From 628d69b6c404c37c511904f38a2e32b23bb8dde0 Mon Sep 17 00:00:00 2001
From: Muhammed Thanish <mnmtanish@gmail.com>
Date: Sat, 18 Jun 2016 14:34:46 +0530
Subject: [PATCH 1/2] Add built socket.io-client

from socketio/socket.io-client 280246357908556dbe98f16d413e6b5030094485
---
 .../preview/components/patched-socket.io.js   | 7252 +++++++++++++++++
 1 file changed, 7252 insertions(+)
 create mode 100644 src/client/preview/components/patched-socket.io.js

diff --git a/src/client/preview/components/patched-socket.io.js b/src/client/preview/components/patched-socket.io.js
new file mode 100644
index 0000000..dc31ae6
--- /dev/null
+++ b/src/client/preview/components/patched-socket.io.js
@@ -0,0 +1,7252 @@
+(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.io = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(_dereq_,module,exports){
+
+module.exports =  _dereq_('./lib/');
+
+},{"./lib/":2}],2:[function(_dereq_,module,exports){
+
+module.exports = _dereq_('./socket');
+
+/**
+ * Exports parser
+ *
+ * @api public
+ *
+ */
+module.exports.parser = _dereq_('engine.io-parser');
+
+},{"./socket":3,"engine.io-parser":19}],3:[function(_dereq_,module,exports){
+(function (global){
+/**
+ * Module dependencies.
+ */
+
+var transports = _dereq_('./transports');
+var Emitter = _dereq_('component-emitter');
+var debug = _dereq_('debug')('engine.io-client:socket');
+var index = _dereq_('indexof');
+var parser = _dereq_('engine.io-parser');
+var parseuri = _dereq_('parseuri');
+var parsejson = _dereq_('parsejson');
+var parseqs = _dereq_('parseqs');
+
+/**
+ * Module exports.
+ */
+
+module.exports = Socket;
+
+/**
+ * Noop function.
+ *
+ * @api private
+ */
+
+function noop(){}
+
+/**
+ * Socket constructor.
+ *
+ * @param {String|Object} uri or options
+ * @param {Object} options
+ * @api public
+ */
+
+function Socket(uri, opts){
+  if (!(this instanceof Socket)) return new Socket(uri, opts);
+
+  opts = opts || {};
+
+  if (uri && 'object' == typeof uri) {
+    opts = uri;
+    uri = null;
+  }
+
+  if (uri) {
+    uri = parseuri(uri);
+    opts.hostname = uri.host;
+    opts.secure = uri.protocol == 'https' || uri.protocol == 'wss';
+    opts.port = uri.port;
+    if (uri.query) opts.query = uri.query;
+  } else if (opts.host) {
+    opts.hostname = parseuri(opts.host).host;
+  }
+
+  this.secure = null != opts.secure ? opts.secure :
+    (global.location && 'https:' == location.protocol);
+
+  if (opts.hostname && !opts.port) {
+    // if no port is specified manually, use the protocol default
+    opts.port = this.secure ? '443' : '80';
+  }
+
+  this.agent = opts.agent || false;
+  this.hostname = opts.hostname ||
+    (global.location ? location.hostname : 'localhost');
+  this.port = opts.port || (global.location && location.port ?
+       location.port :
+       (this.secure ? 443 : 80));
+  this.query = opts.query || {};
+  if ('string' == typeof this.query) this.query = parseqs.decode(this.query);
+  this.upgrade = false !== opts.upgrade;
+  this.path = (opts.path || '/engine.io').replace(/\/$/, '') + '/';
+  this.forceJSONP = !!opts.forceJSONP;
+  this.jsonp = false !== opts.jsonp;
+  this.forceBase64 = !!opts.forceBase64;
+  this.enablesXDR = !!opts.enablesXDR;
+  this.timestampParam = opts.timestampParam || 't';
+  this.timestampRequests = opts.timestampRequests;
+  this.transports = opts.transports || ['polling', 'websocket'];
+  this.readyState = '';
+  this.writeBuffer = [];
+  this.policyPort = opts.policyPort || 843;
+  this.rememberUpgrade = opts.rememberUpgrade || false;
+  this.binaryType = null;
+  this.onlyBinaryUpgrades = opts.onlyBinaryUpgrades;
+  this.perMessageDeflate = false !== opts.perMessageDeflate ? (opts.perMessageDeflate || {}) : false;
+
+  if (true === this.perMessageDeflate) this.perMessageDeflate = {};
+  if (this.perMessageDeflate && null == this.perMessageDeflate.threshold) {
+    this.perMessageDeflate.threshold = 1024;
+  }
+
+  // SSL options for Node.js client
+  this.pfx = opts.pfx || null;
+  this.key = opts.key || null;
+  this.passphrase = opts.passphrase || null;
+  this.cert = opts.cert || null;
+  this.ca = opts.ca || null;
+  this.ciphers = opts.ciphers || null;
+  this.rejectUnauthorized = opts.rejectUnauthorized === undefined ? null : opts.rejectUnauthorized;
+
+  // other options for Node.js client
+  var freeGlobal = typeof global == 'object' && global;
+  if (freeGlobal.global === freeGlobal) {
+    if (opts.extraHeaders && Object.keys(opts.extraHeaders).length > 0) {
+      this.extraHeaders = opts.extraHeaders;
+    }
+  }
+
+  this.open();
+}
+
+Socket.priorWebsocketSuccess = false;
+
+/**
+ * Mix in `Emitter`.
+ */
+
+Emitter(Socket.prototype);
+
+/**
+ * Protocol version.
+ *
+ * @api public
+ */
+
+Socket.protocol = parser.protocol; // this is an int
+
+/**
+ * Expose deps for legacy compatibility
+ * and standalone browser access.
+ */
+
+Socket.Socket = Socket;
+Socket.Transport = _dereq_('./transport');
+Socket.transports = _dereq_('./transports');
+Socket.parser = _dereq_('engine.io-parser');
+
+/**
+ * Creates transport of the given type.
+ *
+ * @param {String} transport name
+ * @return {Transport}
+ * @api private
+ */
+
+Socket.prototype.createTransport = function (name) {
+  debug('creating transport "%s"', name);
+  var query = clone(this.query);
+
+  // append engine.io protocol identifier
+  query.EIO = parser.protocol;
+
+  // transport name
+  query.transport = name;
+
+  // session id if we already have one
+  if (this.id) query.sid = this.id;
+
+  var transport = new transports[name]({
+    agent: this.agent,
+    hostname: this.hostname,
+    port: this.port,
+    secure: this.secure,
+    path: this.path,
+    query: query,
+    forceJSONP: this.forceJSONP,
+    jsonp: this.jsonp,
+    forceBase64: this.forceBase64,
+    enablesXDR: this.enablesXDR,
+    timestampRequests: this.timestampRequests,
+    timestampParam: this.timestampParam,
+    policyPort: this.policyPort,
+    socket: this,
+    pfx: this.pfx,
+    key: this.key,
+    passphrase: this.passphrase,
+    cert: this.cert,
+    ca: this.ca,
+    ciphers: this.ciphers,
+    rejectUnauthorized: this.rejectUnauthorized,
+    perMessageDeflate: this.perMessageDeflate,
+    extraHeaders: this.extraHeaders
+  });
+
+  return transport;
+};
+
+function clone (obj) {
+  var o = {};
+  for (var i in obj) {
+    if (obj.hasOwnProperty(i)) {
+      o[i] = obj[i];
+    }
+  }
+  return o;
+}
+
+/**
+ * Initializes transport to use and starts probe.
+ *
+ * @api private
+ */
+Socket.prototype.open = function () {
+  var transport;
+  if (this.rememberUpgrade && Socket.priorWebsocketSuccess && this.transports.indexOf('websocket') != -1) {
+    transport = 'websocket';
+  } else if (0 === this.transports.length) {
+    // Emit error on next tick so it can be listened to
+    var self = this;
+    setTimeout(function() {
+      self.emit('error', 'No transports available');
+    }, 0);
+    return;
+  } else {
+    transport = this.transports[0];
+  }
+  this.readyState = 'opening';
+
+  // Retry with the next transport if the transport is disabled (jsonp: false)
+  try {
+    transport = this.createTransport(transport);
+  } catch (e) {
+    this.transports.shift();
+    this.open();
+    return;
+  }
+
+  transport.open();
+  this.setTransport(transport);
+};
+
+/**
+ * Sets the current transport. Disables the existing one (if any).
+ *
+ * @api private
+ */
+
+Socket.prototype.setTransport = function(transport){
+  debug('setting transport %s', transport.name);
+  var self = this;
+
+  if (this.transport) {
+    debug('clearing existing transport %s', this.transport.name);
+    this.transport.removeAllListeners();
+  }
+
+  // set up transport
+  this.transport = transport;
+
+  // set up transport listeners
+  transport
+  .on('drain', function(){
+    self.onDrain();
+  })
+  .on('packet', function(packet){
+    self.onPacket(packet);
+  })
+  .on('error', function(e){
+    self.onError(e);
+  })
+  .on('close', function(){
+    self.onClose('transport close');
+  });
+};
+
+/**
+ * Probes a transport.
+ *
+ * @param {String} transport name
+ * @api private
+ */
+
+Socket.prototype.probe = function (name) {
+  debug('probing transport "%s"', name);
+  var transport = this.createTransport(name, { probe: 1 })
+    , failed = false
+    , self = this;
+
+  Socket.priorWebsocketSuccess = false;
+
+  function onTransportOpen(){
+    if (self.onlyBinaryUpgrades) {
+      var upgradeLosesBinary = !this.supportsBinary && self.transport.supportsBinary;
+      failed = failed || upgradeLosesBinary;
+    }
+    if (failed) return;
+
+    debug('probe transport "%s" opened', name);
+    transport.send([{ type: 'ping', data: 'probe' }]);
+    transport.once('packet', function (msg) {
+      if (failed) return;
+      if ('pong' == msg.type && 'probe' == msg.data) {
+        debug('probe transport "%s" pong', name);
+        self.upgrading = true;
+        self.emit('upgrading', transport);
+        if (!transport) return;
+        Socket.priorWebsocketSuccess = 'websocket' == transport.name;
+
+        debug('pausing current transport "%s"', self.transport.name);
+        self.transport.pause(function () {
+          if (failed) return;
+          if ('closed' == self.readyState) return;
+          debug('changing transport and sending upgrade packet');
+
+          cleanup();
+
+          self.setTransport(transport);
+          transport.send([{ type: 'upgrade' }]);
+          self.emit('upgrade', transport);
+          transport = null;
+          self.upgrading = false;
+          self.flush();
+        });
+      } else {
+        debug('probe transport "%s" failed', name);
+        var err = new Error('probe error');
+        err.transport = transport.name;
+        self.emit('upgradeError', err);
+      }
+    });
+  }
+
+  function freezeTransport() {
+    if (failed) return;
+
+    // Any callback called by transport should be ignored since now
+    failed = true;
+
+    cleanup();
+
+    transport.close();
+    transport = null;
+  }
+
+  //Handle any error that happens while probing
+  function onerror(err) {
+    var error = new Error('probe error: ' + err);
+    error.transport = transport.name;
+
+    freezeTransport();
+
+    debug('probe transport "%s" failed because of error: %s', name, err);
+
+    self.emit('upgradeError', error);
+  }
+
+  function onTransportClose(){
+    onerror("transport closed");
+  }
+
+  //When the socket is closed while we're probing
+  function onclose(){
+    onerror("socket closed");
+  }
+
+  //When the socket is upgraded while we're probing
+  function onupgrade(to){
+    if (transport && to.name != transport.name) {
+      debug('"%s" works - aborting "%s"', to.name, transport.name);
+      freezeTransport();
+    }
+  }
+
+  //Remove all listeners on the transport and on self
+  function cleanup(){
+    transport.removeListener('open', onTransportOpen);
+    transport.removeListener('error', onerror);
+    transport.removeListener('close', onTransportClose);
+    self.removeListener('close', onclose);
+    self.removeListener('upgrading', onupgrade);
+  }
+
+  transport.once('open', onTransportOpen);
+  transport.once('error', onerror);
+  transport.once('close', onTransportClose);
+
+  this.once('close', onclose);
+  this.once('upgrading', onupgrade);
+
+  transport.open();
+
+};
+
+/**
+ * Called when connection is deemed open.
+ *
+ * @api public
+ */
+
+Socket.prototype.onOpen = function () {
+  debug('socket open');
+  this.readyState = 'open';
+  Socket.priorWebsocketSuccess = 'websocket' == this.transport.name;
+  this.emit('open');
+  this.flush();
+
+  // we check for `readyState` in case an `open`
+  // listener already closed the socket
+  if ('open' == this.readyState && this.upgrade && this.transport.pause) {
+    debug('starting upgrade probes');
+    for (var i = 0, l = this.upgrades.length; i < l; i++) {
+      this.probe(this.upgrades[i]);
+    }
+  }
+};
+
+/**
+ * Handles a packet.
+ *
+ * @api private
+ */
+
+Socket.prototype.onPacket = function (packet) {
+  if ('opening' == this.readyState || 'open' == this.readyState) {
+    debug('socket receive: type "%s", data "%s"', packet.type, packet.data);
+
+    this.emit('packet', packet);
+
+    // Socket is live - any packet counts
+    this.emit('heartbeat');
+
+    switch (packet.type) {
+      case 'open':
+        this.onHandshake(parsejson(packet.data));
+        break;
+
+      case 'pong':
+        this.setPing();
+        this.emit('pong');
+        break;
+
+      case 'error':
+        var err = new Error('server error');
+        err.code = packet.data;
+        this.onError(err);
+        break;
+
+      case 'message':
+        this.emit('data', packet.data);
+        this.emit('message', packet.data);
+        break;
+    }
+  } else {
+    debug('packet received with socket readyState "%s"', this.readyState);
+  }
+};
+
+/**
+ * Called upon handshake completion.
+ *
+ * @param {Object} handshake obj
+ * @api private
+ */
+
+Socket.prototype.onHandshake = function (data) {
+  this.emit('handshake', data);
+  this.id = data.sid;
+  this.transport.query.sid = data.sid;
+  this.upgrades = this.filterUpgrades(data.upgrades);
+  this.pingInterval = data.pingInterval;
+  this.pingTimeout = data.pingTimeout;
+  this.onOpen();
+  // In case open handler closes socket
+  if  ('closed' == this.readyState) return;
+  this.setPing();
+
+  // Prolong liveness of socket on heartbeat
+  this.removeListener('heartbeat', this.onHeartbeat);
+  this.on('heartbeat', this.onHeartbeat);
+};
+
+/**
+ * Resets ping timeout.
+ *
+ * @api private
+ */
+
+Socket.prototype.onHeartbeat = function (timeout) {
+  clearTimeout(this.pingTimeoutTimer);
+  var self = this;
+  self.pingTimeoutTimer = setTimeout(function () {
+    if ('closed' == self.readyState) return;
+    self.onClose('ping timeout');
+  }, timeout || (self.pingInterval + self.pingTimeout));
+};
+
+/**
+ * Pings server every `this.pingInterval` and expects response
+ * within `this.pingTimeout` or closes connection.
+ *
+ * @api private
+ */
+
+Socket.prototype.setPing = function () {
+  var self = this;
+  clearTimeout(self.pingIntervalTimer);
+  self.pingIntervalTimer = setTimeout(function () {
+    debug('writing ping packet - expecting pong within %sms', self.pingTimeout);
+    self.ping();
+    self.onHeartbeat(self.pingTimeout);
+  }, self.pingInterval);
+};
+
+/**
+* Sends a ping packet.
+*
+* @api private
+*/
+
+Socket.prototype.ping = function () {
+  var self = this;
+  this.sendPacket('ping', function(){
+    self.emit('ping');
+  });
+};
+
+/**
+ * Called on `drain` event
+ *
+ * @api private
+ */
+
+Socket.prototype.onDrain = function() {
+  this.writeBuffer.splice(0, this.prevBufferLen);
+
+  // setting prevBufferLen = 0 is very important
+  // for example, when upgrading, upgrade packet is sent over,
+  // and a nonzero prevBufferLen could cause problems on `drain`
+  this.prevBufferLen = 0;
+
+  if (0 === this.writeBuffer.length) {
+    this.emit('drain');
+  } else {
+    this.flush();
+  }
+};
+
+/**
+ * Flush write buffers.
+ *
+ * @api private
+ */
+
+Socket.prototype.flush = function () {
+  if ('closed' != this.readyState && this.transport.writable &&
+    !this.upgrading && this.writeBuffer.length) {
+    debug('flushing %d packets in socket', this.writeBuffer.length);
+    this.transport.send(this.writeBuffer);
+    // keep track of current length of writeBuffer
+    // splice writeBuffer and callbackBuffer on `drain`
+    this.prevBufferLen = this.writeBuffer.length;
+    this.emit('flush');
+  }
+};
+
+/**
+ * Sends a message.
+ *
+ * @param {String} message.
+ * @param {Function} callback function.
+ * @param {Object} options.
+ * @return {Socket} for chaining.
+ * @api public
+ */
+
+Socket.prototype.write =
+Socket.prototype.send = function (msg, options, fn) {
+  this.sendPacket('message', msg, options, fn);
+  return this;
+};
+
+/**
+ * Sends a packet.
+ *
+ * @param {String} packet type.
+ * @param {String} data.
+ * @param {Object} options.
+ * @param {Function} callback function.
+ * @api private
+ */
+
+Socket.prototype.sendPacket = function (type, data, options, fn) {
+  if('function' == typeof data) {
+    fn = data;
+    data = undefined;
+  }
+
+  if ('function' == typeof options) {
+    fn = options;
+    options = null;
+  }
+
+  if ('closing' == this.readyState || 'closed' == this.readyState) {
+    return;
+  }
+
+  options = options || {};
+  options.compress = false !== options.compress;
+
+  var packet = {
+    type: type,
+    data: data,
+    options: options
+  };
+  this.emit('packetCreate', packet);
+  this.writeBuffer.push(packet);
+  if (fn) this.once('flush', fn);
+  this.flush();
+};
+
+/**
+ * Closes the connection.
+ *
+ * @api private
+ */
+
+Socket.prototype.close = function () {
+  if ('opening' == this.readyState || 'open' == this.readyState) {
+    this.readyState = 'closing';
+
+    var self = this;
+
+    if (this.writeBuffer.length) {
+      this.once('drain', function() {
+        if (this.upgrading) {
+          waitForUpgrade();
+        } else {
+          close();
+        }
+      });
+    } else if (this.upgrading) {
+      waitForUpgrade();
+    } else {
+      close();
+    }
+  }
+
+  function close() {
+    self.onClose('forced close');
+    debug('socket closing - telling transport to close');
+    self.transport.close();
+  }
+
+  function cleanupAndClose() {
+    self.removeListener('upgrade', cleanupAndClose);
+    self.removeListener('upgradeError', cleanupAndClose);
+    close();
+  }
+
+  function waitForUpgrade() {
+    // wait for upgrade to finish since we can't send packets while pausing a transport
+    self.once('upgrade', cleanupAndClose);
+    self.once('upgradeError', cleanupAndClose);
+  }
+
+  return this;
+};
+
+/**
+ * Called upon transport error
+ *
+ * @api private
+ */
+
+Socket.prototype.onError = function (err) {
+  debug('socket error %j', err);
+  Socket.priorWebsocketSuccess = false;
+  this.emit('error', err);
+  this.onClose('transport error', err);
+};
+
+/**
+ * Called upon transport close.
+ *
+ * @api private
+ */
+
+Socket.prototype.onClose = function (reason, desc) {
+  if ('opening' == this.readyState || 'open' == this.readyState || 'closing' == this.readyState) {
+    debug('socket close with reason: "%s"', reason);
+    var self = this;
+
+    // clear timers
+    clearTimeout(this.pingIntervalTimer);
+    clearTimeout(this.pingTimeoutTimer);
+
+    // stop event from firing again for transport
+    this.transport.removeAllListeners('close');
+
+    // ensure transport won't stay open
+    this.transport.close();
+
+    // ignore further transport communication
+    this.transport.removeAllListeners();
+
+    // set ready state
+    this.readyState = 'closed';
+
+    // clear session id
+    this.id = null;
+
+    // emit close event
+    this.emit('close', reason, desc);
+
+    // clean buffers after, so users can still
+    // grab the buffers on `close` event
+    self.writeBuffer = [];
+    self.prevBufferLen = 0;
+  }
+};
+
+/**
+ * Filters upgrades, returning only those matching client transports.
+ *
+ * @param {Array} server upgrades
+ * @api private
+ *
+ */
+
+Socket.prototype.filterUpgrades = function (upgrades) {
+  var filteredUpgrades = [];
+  for (var i = 0, j = upgrades.length; i<j; i++) {
+    if (~index(this.transports, upgrades[i])) filteredUpgrades.push(upgrades[i]);
+  }
+  return filteredUpgrades;
+};
+
+}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
+},{"./transport":4,"./transports":5,"component-emitter":15,"debug":17,"engine.io-parser":19,"indexof":23,"parsejson":26,"parseqs":27,"parseuri":28}],4:[function(_dereq_,module,exports){
+/**
+ * Module dependencies.
+ */
+
+var parser = _dereq_('engine.io-parser');
+var Emitter = _dereq_('component-emitter');
+
+/**
+ * Module exports.
+ */
+
+module.exports = Transport;
+
+/**
+ * Transport abstract constructor.
+ *
+ * @param {Object} options.
+ * @api private
+ */
+
+function Transport (opts) {
+  this.path = opts.path;
+  this.hostname = opts.hostname;
+  this.port = opts.port;
+  this.secure = opts.secure;
+  this.query = opts.query;
+  this.timestampParam = opts.timestampParam;
+  this.timestampRequests = opts.timestampRequests;
+  this.readyState = '';
+  this.agent = opts.agent || false;
+  this.socket = opts.socket;
+  this.enablesXDR = opts.enablesXDR;
+
+  // SSL options for Node.js client
+  this.pfx = opts.pfx;
+  this.key = opts.key;
+  this.passphrase = opts.passphrase;
+  this.cert = opts.cert;
+  this.ca = opts.ca;
+  this.ciphers = opts.ciphers;
+  this.rejectUnauthorized = opts.rejectUnauthorized;
+
+  // other options for Node.js client
+  this.extraHeaders = opts.extraHeaders;
+}
+
+/**
+ * Mix in `Emitter`.
+ */
+
+Emitter(Transport.prototype);
+
+/**
+ * Emits an error.
+ *
+ * @param {String} str
+ * @return {Transport} for chaining
+ * @api public
+ */
+
+Transport.prototype.onError = function (msg, desc) {
+  var err = new Error(msg);
+  err.type = 'TransportError';
+  err.description = desc;
+  this.emit('error', err);
+  return this;
+};
+
+/**
+ * Opens the transport.
+ *
+ * @api public
+ */
+
+Transport.prototype.open = function () {
+  if ('closed' == this.readyState || '' == this.readyState) {
+    this.readyState = 'opening';
+    this.doOpen();
+  }
+
+  return this;
+};
+
+/**
+ * Closes the transport.
+ *
+ * @api private
+ */
+
+Transport.prototype.close = function () {
+  if ('opening' == this.readyState || 'open' == this.readyState) {
+    this.doClose();
+    this.onClose();
+  }
+
+  return this;
+};
+
+/**
+ * Sends multiple packets.
+ *
+ * @param {Array} packets
+ * @api private
+ */
+
+Transport.prototype.send = function(packets){
+  if ('open' == this.readyState) {
+    this.write(packets);
+  } else {
+    throw new Error('Transport not open');
+  }
+};
+
+/**
+ * Called upon open
+ *
+ * @api private
+ */
+
+Transport.prototype.onOpen = function () {
+  this.readyState = 'open';
+  this.writable = true;
+  this.emit('open');
+};
+
+/**
+ * Called with data.
+ *
+ * @param {String} data
+ * @api private
+ */
+
+Transport.prototype.onData = function(data){
+  var packet = parser.decodePacket(data, this.socket.binaryType);
+  this.onPacket(packet);
+};
+
+/**
+ * Called with a decoded packet.
+ */
+
+Transport.prototype.onPacket = function (packet) {
+  this.emit('packet', packet);
+};
+
+/**
+ * Called upon close.
+ *
+ * @api private
+ */
+
+Transport.prototype.onClose = function () {
+  this.readyState = 'closed';
+  this.emit('close');
+};
+
+},{"component-emitter":15,"engine.io-parser":19}],5:[function(_dereq_,module,exports){
+(function (global){
+/**
+ * Module dependencies
+ */
+
+var XMLHttpRequest = _dereq_('xmlhttprequest-ssl');
+var XHR = _dereq_('./polling-xhr');
+var JSONP = _dereq_('./polling-jsonp');
+var websocket = _dereq_('./websocket');
+
+/**
+ * Export transports.
+ */
+
+exports.polling = polling;
+exports.websocket = websocket;
+
+/**
+ * Polling transport polymorphic constructor.
+ * Decides on xhr vs jsonp based on feature detection.
+ *
+ * @api private
+ */
+
+function polling(opts){
+  var xhr;
+  var xd = false;
+  var xs = false;
+  var jsonp = false !== opts.jsonp;
+
+  if (global.location) {
+    var isSSL = 'https:' == location.protocol;
+    var port = location.port;
+
+    // some user agents have empty `location.port`
+    if (!port) {
+      port = isSSL ? 443 : 80;
+    }
+
+    xd = opts.hostname != location.hostname || port != opts.port;
+    xs = opts.secure != isSSL;
+  }
+
+  opts.xdomain = xd;
+  opts.xscheme = xs;
+  xhr = new XMLHttpRequest(opts);
+
+  if ('open' in xhr && !opts.forceJSONP) {
+    return new XHR(opts);
+  } else {
+    if (!jsonp) throw new Error('JSONP disabled');
+    return new JSONP(opts);
+  }
+}
+
+}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
+},{"./polling-jsonp":6,"./polling-xhr":7,"./websocket":9,"xmlhttprequest-ssl":10}],6:[function(_dereq_,module,exports){
+(function (global){
+
+/**
+ * Module requirements.
+ */
+
+var Polling = _dereq_('./polling');
+var inherit = _dereq_('component-inherit');
+
+/**
+ * Module exports.
+ */
+
+module.exports = JSONPPolling;
+
+/**
+ * Cached regular expressions.
+ */
+
+var rNewline = /\n/g;
+var rEscapedNewline = /\\n/g;
+
+/**
+ * Global JSONP callbacks.
+ */
+
+var callbacks;
+
+/**
+ * Callbacks count.
+ */
+
+var index = 0;
+
+/**
+ * Noop.
+ */
+
+function empty () { }
+
+/**
+ * JSONP Polling constructor.
+ *
+ * @param {Object} opts.
+ * @api public
+ */
+
+function JSONPPolling (opts) {
+  Polling.call(this, opts);
+
+  this.query = this.query || {};
+
+  // define global callbacks array if not present
+  // we do this here (lazily) to avoid unneeded global pollution
+  if (!callbacks) {
+    // we need to consider multiple engines in the same page
+    if (!global.___eio) global.___eio = [];
+    callbacks = global.___eio;
+  }
+
+  // callback identifier
+  this.index = callbacks.length;
+
+  // add callback to jsonp global
+  var self = this;
+  callbacks.push(function (msg) {
+    self.onData(msg);
+  });
+
+  // append to query string
+  this.query.j = this.index;
+
+  // prevent spurious errors from being emitted when the window is unloaded
+  if (global.document && global.addEventListener) {
+    global.addEventListener('beforeunload', function () {
+      if (self.script) self.script.onerror = empty;
+    }, false);
+  }
+}
+
+/**
+ * Inherits from Polling.
+ */
+
+inherit(JSONPPolling, Polling);
+
+/*
+ * JSONP only supports binary as base64 encoded strings
+ */
+
+JSONPPolling.prototype.supportsBinary = false;
+
+/**
+ * Closes the socket.
+ *
+ * @api private
+ */
+
+JSONPPolling.prototype.doClose = function () {
+  if (this.script) {
+    this.script.parentNode.removeChild(this.script);
+    this.script = null;
+  }
+
+  if (this.form) {
+    this.form.parentNode.removeChild(this.form);
+    this.form = null;
+    this.iframe = null;
+  }
+
+  Polling.prototype.doClose.call(this);
+};
+
+/**
+ * Starts a poll cycle.
+ *
+ * @api private
+ */
+
+JSONPPolling.prototype.doPoll = function () {
+  var self = this;
+  var script = document.createElement('script');
+
+  if (this.script) {
+    this.script.parentNode.removeChild(this.script);
+    this.script = null;
+  }
+
+  script.async = true;
+  script.src = this.uri();
+  script.onerror = function(e){
+    self.onError('jsonp poll error',e);
+  };
+
+  var insertAt = document.getElementsByTagName('script')[0];
+  if (insertAt) {
+    insertAt.parentNode.insertBefore(script, insertAt);
+  }
+  else {
+    (document.head || document.body).appendChild(script);
+  }
+  this.script = script;
+
+  var isUAgecko = 'undefined' != typeof navigator && /gecko/i.test(navigator.userAgent);
+
+  if (isUAgecko) {
+    setTimeout(function () {
+      var iframe = document.createElement('iframe');
+      document.body.appendChild(iframe);
+      document.body.removeChild(iframe);
+    }, 100);
+  }
+};
+
+/**
+ * Writes with a hidden iframe.
+ *
+ * @param {String} data to send
+ * @param {Function} called upon flush.
+ * @api private
+ */
+
+JSONPPolling.prototype.doWrite = function (data, fn) {
+  var self = this;
+
+  if (!this.form) {
+    var form = document.createElement('form');
+    var area = document.createElement('textarea');
+    var id = this.iframeId = 'eio_iframe_' + this.index;
+    var iframe;
+
+    form.className = 'socketio';
+    form.style.position = 'absolute';
+    form.style.top = '-1000px';
+    form.style.left = '-1000px';
+    form.target = id;
+    form.method = 'POST';
+    form.setAttribute('accept-charset', 'utf-8');
+    area.name = 'd';
+    form.appendChild(area);
+    document.body.appendChild(form);
+
+    this.form = form;
+    this.area = area;
+  }
+
+  this.form.action = this.uri();
+
+  function complete () {
+    initIframe();
+    fn();
+  }
+
+  function initIframe () {
+    if (self.iframe) {
+      try {
+        self.form.removeChild(self.iframe);
+      } catch (e) {
+        self.onError('jsonp polling iframe removal error', e);
+      }
+    }
+
+    try {
+      // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
+      var html = '<iframe src="javascript:0" name="'+ self.iframeId +'">';
+      iframe = document.createElement(html);
+    } catch (e) {
+      iframe = document.createElement('iframe');
+      iframe.name = self.iframeId;
+      iframe.src = 'javascript:0';
+    }
+
+    iframe.id = self.iframeId;
+
+    self.form.appendChild(iframe);
+    self.iframe = iframe;
+  }
+
+  initIframe();
+
+  // escape \n to prevent it from being converted into \r\n by some UAs
+  // double escaping is required for escaped new lines because unescaping of new lines can be done safely on server-side
+  data = data.replace(rEscapedNewline, '\\\n');
+  this.area.value = data.replace(rNewline, '\\n');
+
+  try {
+    this.form.submit();
+  } catch(e) {}
+
+  if (this.iframe.attachEvent) {
+    this.iframe.onreadystatechange = function(){
+      if (self.iframe.readyState == 'complete') {
+        complete();
+      }
+    };
+  } else {
+    this.iframe.onload = complete;
+  }
+};
+
+}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
+},{"./polling":8,"component-inherit":16}],7:[function(_dereq_,module,exports){
+(function (global){
+/**
+ * Module requirements.
+ */
+
+var XMLHttpRequest = _dereq_('xmlhttprequest-ssl');
+var Polling = _dereq_('./polling');
+var Emitter = _dereq_('component-emitter');
+var inherit = _dereq_('component-inherit');
+var debug = _dereq_('debug')('engine.io-client:polling-xhr');
+
+/**
+ * Module exports.
+ */
+
+module.exports = XHR;
+module.exports.Request = Request;
+
+/**
+ * Empty function
+ */
+
+function empty(){}
+
+/**
+ * XHR Polling constructor.
+ *
+ * @param {Object} opts
+ * @api public
+ */
+
+function XHR(opts){
+  Polling.call(this, opts);
+
+  if (global.location) {
+    var isSSL = 'https:' == location.protocol;
+    var port = location.port;
+
+    // some user agents have empty `location.port`
+    if (!port) {
+      port = isSSL ? 443 : 80;
+    }
+
+    this.xd = opts.hostname != global.location.hostname ||
+      port != opts.port;
+    this.xs = opts.secure != isSSL;
+  } else {
+    this.extraHeaders = opts.extraHeaders;
+  }
+}
+
+/**
+ * Inherits from Polling.
+ */
+
+inherit(XHR, Polling);
+
+/**
+ * XHR supports binary
+ */
+
+XHR.prototype.supportsBinary = true;
+
+/**
+ * Creates a request.
+ *
+ * @param {String} method
+ * @api private
+ */
+
+XHR.prototype.request = function(opts){
+  opts = opts || {};
+  opts.uri = this.uri();
+  opts.xd = this.xd;
+  opts.xs = this.xs;
+  opts.agent = this.agent || false;
+  opts.supportsBinary = this.supportsBinary;
+  opts.enablesXDR = this.enablesXDR;
+
+  // SSL options for Node.js client
+  opts.pfx = this.pfx;
+  opts.key = this.key;
+  opts.passphrase = this.passphrase;
+  opts.cert = this.cert;
+  opts.ca = this.ca;
+  opts.ciphers = this.ciphers;
+  opts.rejectUnauthorized = this.rejectUnauthorized;
+
+  // other options for Node.js client
+  opts.extraHeaders = this.extraHeaders;
+
+  return new Request(opts);
+};
+
+/**
+ * Sends data.
+ *
+ * @param {String} data to send.
+ * @param {Function} called upon flush.
+ * @api private
+ */
+
+XHR.prototype.doWrite = function(data, fn){
+  var isBinary = typeof data !== 'string' && data !== undefined;
+  var req = this.request({ method: 'POST', data: data, isBinary: isBinary });
+  var self = this;
+  req.on('success', fn);
+  req.on('error', function(err){
+    self.onError('xhr post error', err);
+  });
+  this.sendXhr = req;
+};
+
+/**
+ * Starts a poll cycle.
+ *
+ * @api private
+ */
+
+XHR.prototype.doPoll = function(){
+  debug('xhr poll');
+  var req = this.request();
+  var self = this;
+  req.on('data', function(data){
+    self.onData(data);
+  });
+  req.on('error', function(err){
+    self.onError('xhr poll error', err);
+  });
+  this.pollXhr = req;
+};
+
+/**
+ * Request constructor
+ *
+ * @param {Object} options
+ * @api public
+ */
+
+function Request(opts){
+  this.method = opts.method || 'GET';
+  this.uri = opts.uri;
+  this.xd = !!opts.xd;
+  this.xs = !!opts.xs;
+  this.async = false !== opts.async;
+  this.data = undefined != opts.data ? opts.data : null;
+  this.agent = opts.agent;
+  this.isBinary = opts.isBinary;
+  this.supportsBinary = opts.supportsBinary;
+  this.enablesXDR = opts.enablesXDR;
+
+  // SSL options for Node.js client
+  this.pfx = opts.pfx;
+  this.key = opts.key;
+  this.passphrase = opts.passphrase;
+  this.cert = opts.cert;
+  this.ca = opts.ca;
+  this.ciphers = opts.ciphers;
+  this.rejectUnauthorized = opts.rejectUnauthorized;
+
+  // other options for Node.js client
+  this.extraHeaders = opts.extraHeaders;
+
+  this.create();
+}
+
+/**
+ * Mix in `Emitter`.
+ */
+
+Emitter(Request.prototype);
+
+/**
+ * Creates the XHR object and sends the request.
+ *
+ * @api private
+ */
+
+Request.prototype.create = function(){
+  var opts = { agent: this.agent, xdomain: this.xd, xscheme: this.xs, enablesXDR: this.enablesXDR };
+
+  // SSL options for Node.js client
+  opts.pfx = this.pfx;
+  opts.key = this.key;
+  opts.passphrase = this.passphrase;
+  opts.cert = this.cert;
+  opts.ca = this.ca;
+  opts.ciphers = this.ciphers;
+  opts.rejectUnauthorized = this.rejectUnauthorized;
+
+  var xhr = this.xhr = new XMLHttpRequest(opts);
+  var self = this;
+
+  try {
+    debug('xhr open %s: %s', this.method, this.uri);
+    xhr.open(this.method, this.uri, this.async);
+    try {
+      if (this.extraHeaders) {
+        xhr.setDisableHeaderCheck(true);
+        for (var i in this.extraHeaders) {
+          if (this.extraHeaders.hasOwnProperty(i)) {
+            xhr.setRequestHeader(i, this.extraHeaders[i]);
+          }
+        }
+      }
+    } catch (e) {}
+    if (this.supportsBinary) {
+      // This has to be done after open because Firefox is stupid
+      // http://stackoverflow.com/questions/13216903/get-binary-data-with-xmlhttprequest-in-a-firefox-extension
+      xhr.responseType = 'arraybuffer';
+    }
+
+    if ('POST' == this.method) {
+      try {
+        if (this.isBinary) {
+          xhr.setRequestHeader('Content-type', 'application/octet-stream');
+        } else {
+          xhr.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');
+        }
+      } catch (e) {}
+    }
+
+    // ie6 check
+    if ('withCredentials' in xhr) {
+      xhr.withCredentials = true;
+    }
+
+    if (this.hasXDR()) {
+      xhr.onload = function(){
+        self.onLoad();
+      };
+      xhr.onerror = function(){
+        self.onError(xhr.responseText);
+      };
+    } else {
+      xhr.onreadystatechange = function(){
+        if (4 != xhr.readyState) return;
+        if (200 == xhr.status || 1223 == xhr.status) {
+          self.onLoad();
+        } else {
+          // make sure the `error` event handler that's user-set
+          // does not throw in the same tick and gets caught here
+          setTimeout(function(){
+            self.onError(xhr.status);
+          }, 0);
+        }
+      };
+    }
+
+    debug('xhr data %s', this.data);
+    xhr.send(this.data);
+  } catch (e) {
+    // Need to defer since .create() is called directly fhrom the constructor
+    // and thus the 'error' event can only be only bound *after* this exception
+    // occurs.  Therefore, also, we cannot throw here at all.
+    setTimeout(function() {
+      self.onError(e);
+    }, 0);
+    return;
+  }
+
+  if (global.document) {
+    this.index = Request.requestsCount++;
+    Request.requests[this.index] = this;
+  }
+};
+
+/**
+ * Called upon successful response.
+ *
+ * @api private
+ */
+
+Request.prototype.onSuccess = function(){
+  this.emit('success');
+  this.cleanup();
+};
+
+/**
+ * Called if we have data.
+ *
+ * @api private
+ */
+
+Request.prototype.onData = function(data){
+  this.emit('data', data);
+  this.onSuccess();
+};
+
+/**
+ * Called upon error.
+ *
+ * @api private
+ */
+
+Request.prototype.onError = function(err){
+  this.emit('error', err);
+  this.cleanup(true);
+};
+
+/**
+ * Cleans up house.
+ *
+ * @api private
+ */
+
+Request.prototype.cleanup = function(fromError){
+  if ('undefined' == typeof this.xhr || null === this.xhr) {
+    return;
+  }
+  // xmlhttprequest
+  if (this.hasXDR()) {
+    this.xhr.onload = this.xhr.onerror = empty;
+  } else {
+    this.xhr.onreadystatechange = empty;
+  }
+
+  if (fromError) {
+    try {
+      this.xhr.abort();
+    } catch(e) {}
+  }
+
+  if (global.document) {
+    delete Request.requests[this.index];
+  }
+
+  this.xhr = null;
+};
+
+/**
+ * Called upon load.
+ *
+ * @api private
+ */
+
+Request.prototype.onLoad = function(){
+  var data;
+  try {
+    var contentType;
+    try {
+      contentType = this.xhr.getResponseHeader('Content-Type').split(';')[0];
+    } catch (e) {}
+    if (contentType === 'application/octet-stream') {
+      data = this.xhr.response;
+    } else {
+      if (!this.supportsBinary) {
+        data = this.xhr.responseText;
+      } else {
+        try {
+          data = String.fromCharCode.apply(null, new Uint8Array(this.xhr.response));
+        } catch (e) {
+          var ui8Arr = new Uint8Array(this.xhr.response);
+          var dataArray = [];
+          for (var idx = 0, length = ui8Arr.length; idx < length; idx++) {
+            dataArray.push(ui8Arr[idx]);
+          }
+
+          data = String.fromCharCode.apply(null, dataArray);
+        }
+      }
+    }
+  } catch (e) {
+    this.onError(e);
+  }
+  if (null != data) {
+    this.onData(data);
+  }
+};
+
+/**
+ * Check if it has XDomainRequest.
+ *
+ * @api private
+ */
+
+Request.prototype.hasXDR = function(){
+  return 'undefined' !== typeof global.XDomainRequest && !this.xs && this.enablesXDR;
+};
+
+/**
+ * Aborts the request.
+ *
+ * @api public
+ */
+
+Request.prototype.abort = function(){
+  this.cleanup();
+};
+
+/**
+ * Aborts pending requests when unloading the window. This is needed to prevent
+ * memory leaks (e.g. when using IE) and to ensure that no spurious error is
+ * emitted.
+ */
+
+if (global.document) {
+  Request.requestsCount = 0;
+  Request.requests = {};
+  if (global.attachEvent) {
+    global.attachEvent('onunload', unloadHandler);
+  } else if (global.addEventListener) {
+    global.addEventListener('beforeunload', unloadHandler, false);
+  }
+}
+
+function unloadHandler() {
+  for (var i in Request.requests) {
+    if (Request.requests.hasOwnProperty(i)) {
+      Request.requests[i].abort();
+    }
+  }
+}
+
+}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
+},{"./polling":8,"component-emitter":15,"component-inherit":16,"debug":17,"xmlhttprequest-ssl":10}],8:[function(_dereq_,module,exports){
+/**
+ * Module dependencies.
+ */
+
+var Transport = _dereq_('../transport');
+var parseqs = _dereq_('parseqs');
+var parser = _dereq_('engine.io-parser');
+var inherit = _dereq_('component-inherit');
+var yeast = _dereq_('yeast');
+var debug = _dereq_('debug')('engine.io-client:polling');
+
+/**
+ * Module exports.
+ */
+
+module.exports = Polling;
+
+/**
+ * Is XHR2 supported?
+ */
+
+var hasXHR2 = (function() {
+  var XMLHttpRequest = _dereq_('xmlhttprequest-ssl');
+  var xhr = new XMLHttpRequest({ xdomain: false });
+  return null != xhr.responseType;
+})();
+
+/**
+ * Polling interface.
+ *
+ * @param {Object} opts
+ * @api private
+ */
+
+function Polling(opts){
+  var forceBase64 = (opts && opts.forceBase64);
+  if (!hasXHR2 || forceBase64) {
+    this.supportsBinary = false;
+  }
+  Transport.call(this, opts);
+}
+
+/**
+ * Inherits from Transport.
+ */
+
+inherit(Polling, Transport);
+
+/**
+ * Transport name.
+ */
+
+Polling.prototype.name = 'polling';
+
+/**
+ * Opens the socket (triggers polling). We write a PING message to determine
+ * when the transport is open.
+ *
+ * @api private
+ */
+
+Polling.prototype.doOpen = function(){
+  this.poll();
+};
+
+/**
+ * Pauses polling.
+ *
+ * @param {Function} callback upon buffers are flushed and transport is paused
+ * @api private
+ */
+
+Polling.prototype.pause = function(onPause){
+  var pending = 0;
+  var self = this;
+
+  this.readyState = 'pausing';
+
+  function pause(){
+    debug('paused');
+    self.readyState = 'paused';
+    onPause();
+  }
+
+  if (this.polling || !this.writable) {
+    var total = 0;
+
+    if (this.polling) {
+      debug('we are currently polling - waiting to pause');
+      total++;
+      this.once('pollComplete', function(){
+        debug('pre-pause polling complete');
+        --total || pause();
+      });
+    }
+
+    if (!this.writable) {
+      debug('we are currently writing - waiting to pause');
+      total++;
+      this.once('drain', function(){
+        debug('pre-pause writing complete');
+        --total || pause();
+      });
+    }
+  } else {
+    pause();
+  }
+};
+
+/**
+ * Starts polling cycle.
+ *
+ * @api public
+ */
+
+Polling.prototype.poll = function(){
+  debug('polling');
+  this.polling = true;
+  this.doPoll();
+  this.emit('poll');
+};
+
+/**
+ * Overloads onData to detect payloads.
+ *
+ * @api private
+ */
+
+Polling.prototype.onData = function(data){
+  var self = this;
+  debug('polling got data %s', data);
+  var callback = function(packet, index, total) {
+    // if its the first message we consider the transport open
+    if ('opening' == self.readyState) {
+      self.onOpen();
+    }
+
+    // if its a close packet, we close the ongoing requests
+    if ('close' == packet.type) {
+      self.onClose();
+      return false;
+    }
+
+    // otherwise bypass onData and handle the message
+    self.onPacket(packet);
+  };
+
+  // decode payload
+  parser.decodePayload(data, this.socket.binaryType, callback);
+
+  // if an event did not trigger closing
+  if ('closed' != this.readyState) {
+    // if we got data we're not polling
+    this.polling = false;
+    this.emit('pollComplete');
+
+    if ('open' == this.readyState) {
+      this.poll();
+    } else {
+      debug('ignoring poll - transport state "%s"', this.readyState);
+    }
+  }
+};
+
+/**
+ * For polling, send a close packet.
+ *
+ * @api private
+ */
+
+Polling.prototype.doClose = function(){
+  var self = this;
+
+  function close(){
+    debug('writing close packet');
+    self.write([{ type: 'close' }]);
+  }
+
+  if ('open' == this.readyState) {
+    debug('transport open - closing');
+    close();
+  } else {
+    // in case we're trying to close while
+    // handshaking is in progress (GH-164)
+    debug('transport not open - deferring close');
+    this.once('open', close);
+  }
+};
+
+/**
+ * Writes a packets payload.
+ *
+ * @param {Array} data packets
+ * @param {Function} drain callback
+ * @api private
+ */
+
+Polling.prototype.write = function(packets){
+  var self = this;
+  this.writable = false;
+  var callbackfn = function() {
+    self.writable = true;
+    self.emit('drain');
+  };
+
+  var self = this;
+  parser.encodePayload(packets, this.supportsBinary, function(data) {
+    self.doWrite(data, callbackfn);
+  });
+};
+
+/**
+ * Generates uri for connection.
+ *
+ * @api private
+ */
+
+Polling.prototype.uri = function(){
+  var query = this.query || {};
+  var schema = this.secure ? 'https' : 'http';
+  var port = '';
+
+  // cache busting is forced
+  if (false !== this.timestampRequests) {
+    query[this.timestampParam] = yeast();
+  }
+
+  if (!this.supportsBinary && !query.sid) {
+    query.b64 = 1;
+  }
+
+  query = parseqs.encode(query);
+
+  // avoid port if default for schema
+  if (this.port && (('https' == schema && this.port != 443) ||
+     ('http' == schema && this.port != 80))) {
+    port = ':' + this.port;
+  }
+
+  // prepend ? to query
+  if (query.length) {
+    query = '?' + query;
+  }
+
+  var ipv6 = this.hostname.indexOf(':') !== -1;
+  return schema + '://' + (ipv6 ? '[' + this.hostname + ']' : this.hostname) + port + this.path + query;
+};
+
+},{"../transport":4,"component-inherit":16,"debug":17,"engine.io-parser":19,"parseqs":27,"xmlhttprequest-ssl":10,"yeast":30}],9:[function(_dereq_,module,exports){
+(function (global){
+/**
+ * Module dependencies.
+ */
+
+var Transport = _dereq_('../transport');
+var parser = _dereq_('engine.io-parser');
+var parseqs = _dereq_('parseqs');
+var inherit = _dereq_('component-inherit');
+var yeast = _dereq_('yeast');
+var debug = _dereq_('debug')('engine.io-client:websocket');
+var BrowserWebSocket = global.WebSocket || global.MozWebSocket;
+
+/**
+ * Get either the `WebSocket` or `MozWebSocket` globals
+ * in the browser or try to resolve WebSocket-compatible
+ * interface exposed by `ws` for Node-like environment.
+ */
+
+var WebSocket = BrowserWebSocket;
+if (!WebSocket && typeof window === 'undefined') {
+  try {
+    WebSocket = _dereq_('ws');
+  } catch (e) { }
+}
+
+/**
+ * Module exports.
+ */
+
+module.exports = WS;
+
+/**
+ * WebSocket transport constructor.
+ *
+ * @api {Object} connection options
+ * @api public
+ */
+
+function WS(opts){
+  var forceBase64 = (opts && opts.forceBase64);
+  if (forceBase64) {
+    this.supportsBinary = false;
+  }
+  this.perMessageDeflate = opts.perMessageDeflate;
+  Transport.call(this, opts);
+}
+
+/**
+ * Inherits from Transport.
+ */
+
+inherit(WS, Transport);
+
+/**
+ * Transport name.
+ *
+ * @api public
+ */
+
+WS.prototype.name = 'websocket';
+
+/*
+ * WebSockets support binary
+ */
+
+WS.prototype.supportsBinary = true;
+
+/**
+ * Opens socket.
+ *
+ * @api private
+ */
+
+WS.prototype.doOpen = function(){
+  if (!this.check()) {
+    // let probe timeout
+    return;
+  }
+
+  var self = this;
+  var uri = this.uri();
+  var protocols = void(0);
+  var opts = {
+    agent: this.agent,
+    perMessageDeflate: this.perMessageDeflate
+  };
+
+  // SSL options for Node.js client
+  opts.pfx = this.pfx;
+  opts.key = this.key;
+  opts.passphrase = this.passphrase;
+  opts.cert = this.cert;
+  opts.ca = this.ca;
+  opts.ciphers = this.ciphers;
+  opts.rejectUnauthorized = this.rejectUnauthorized;
+  if (this.extraHeaders) {
+    opts.headers = this.extraHeaders;
+  }
+
+  this.ws = BrowserWebSocket ? new WebSocket(uri) : new WebSocket(uri, protocols, opts);
+
+  if (this.ws.binaryType === undefined) {
+    this.supportsBinary = false;
+  }
+
+  if (this.ws.supports && this.ws.supports.binary) {
+    this.supportsBinary = true;
+    this.ws.binaryType = 'buffer';
+  } else {
+    this.ws.binaryType = 'arraybuffer';
+  }
+
+  this.addEventListeners();
+};
+
+/**
+ * Adds event listeners to the socket
+ *
+ * @api private
+ */
+
+WS.prototype.addEventListeners = function(){
+  var self = this;
+
+  this.ws.onopen = function(){
+    self.onOpen();
+  };
+  this.ws.onclose = function(){
+    self.onClose();
+  };
+  this.ws.onmessage = function(ev){
+    self.onData(ev.data);
+  };
+  this.ws.onerror = function(e){
+    self.onError('websocket error', e);
+  };
+};
+
+/**
+ * Override `onData` to use a timer on iOS.
+ * See: https://gist.github.com/mloughran/2052006
+ *
+ * @api private
+ */
+
+if ('undefined' != typeof navigator
+  && /iPad|iPhone|iPod/i.test(navigator.userAgent)) {
+  WS.prototype.onData = function(data){
+    var self = this;
+    setTimeout(function(){
+      Transport.prototype.onData.call(self, data);
+    }, 0);
+  };
+}
+
+/**
+ * Writes data to socket.
+ *
+ * @param {Array} array of packets.
+ * @api private
+ */
+
+WS.prototype.write = function(packets){
+  var self = this;
+  this.writable = false;
+
+  // encodePacket efficient as it uses WS framing
+  // no need for encodePayload
+  var total = packets.length;
+  for (var i = 0, l = total; i < l; i++) {
+    (function(packet) {
+      parser.encodePacket(packet, self.supportsBinary, function(data) {
+        if (!BrowserWebSocket) {
+          // always create a new object (GH-437)
+          var opts = {};
+          if (packet.options) {
+            opts.compress = packet.options.compress;
+          }
+
+          if (self.perMessageDeflate) {
+            var len = 'string' == typeof data ? global.Buffer.byteLength(data) : data.length;
+            if (len < self.perMessageDeflate.threshold) {
+              opts.compress = false;
+            }
+          }
+        }
+
+        //Sometimes the websocket has already been closed but the browser didn't
+        //have a chance of informing us about it yet, in that case send will
+        //throw an error
+        try {
+          if (BrowserWebSocket) {
+            // TypeError is thrown when passing the second argument on Safari
+            self.ws.send(data);
+          } else {
+            self.ws.send(data, opts);
+          }
+        } catch (e){
+          debug('websocket closed before onclose event');
+        }
+
+        --total || done();
+      });
+    })(packets[i]);
+  }
+
+  function done(){
+    self.emit('flush');
+
+    // fake drain
+    // defer to next tick to allow Socket to clear writeBuffer
+    setTimeout(function(){
+      self.writable = true;
+      self.emit('drain');
+    }, 0);
+  }
+};
+
+/**
+ * Called upon close
+ *
+ * @api private
+ */
+
+WS.prototype.onClose = function(){
+  Transport.prototype.onClose.call(this);
+};
+
+/**
+ * Closes socket.
+ *
+ * @api private
+ */
+
+WS.prototype.doClose = function(){
+  if (typeof this.ws !== 'undefined') {
+    this.ws.close();
+  }
+};
+
+/**
+ * Generates uri for connection.
+ *
+ * @api private
+ */
+
+WS.prototype.uri = function(){
+  var query = this.query || {};
+  var schema = this.secure ? 'wss' : 'ws';
+  var port = '';
+
+  // avoid port if default for schema
+  if (this.port && (('wss' == schema && this.port != 443)
+    || ('ws' == schema && this.port != 80))) {
+    port = ':' + this.port;
+  }
+
+  // append timestamp to URI
+  if (this.timestampRequests) {
+    query[this.timestampParam] = yeast();
+  }
+
+  // communicate binary support capabilities
+  if (!this.supportsBinary) {
+    query.b64 = 1;
+  }
+
+  query = parseqs.encode(query);
+
+  // prepend ? to query
+  if (query.length) {
+    query = '?' + query;
+  }
+
+  var ipv6 = this.hostname.indexOf(':') !== -1;
+  return schema + '://' + (ipv6 ? '[' + this.hostname + ']' : this.hostname) + port + this.path + query;
+};
+
+/**
+ * Feature detection for WebSocket.
+ *
+ * @return {Boolean} whether this transport is available.
+ * @api public
+ */
+
+WS.prototype.check = function(){
+  return !!WebSocket && !('__initialize' in WebSocket && this.name === WS.prototype.name);
+};
+
+}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
+},{"../transport":4,"component-inherit":16,"debug":17,"engine.io-parser":19,"parseqs":27,"ws":undefined,"yeast":30}],10:[function(_dereq_,module,exports){
+// browser shim for xmlhttprequest module
+var hasCORS = _dereq_('has-cors');
+
+module.exports = function(opts) {
+  var xdomain = opts.xdomain;
+
+  // scheme must be same when usign XDomainRequest
+  // http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx
+  var xscheme = opts.xscheme;
+
+  // XDomainRequest has a flow of not sending cookie, therefore it should be disabled as a default.
+  // https://github.com/Automattic/engine.io-client/pull/217
+  var enablesXDR = opts.enablesXDR;
+
+  // XMLHttpRequest can be disabled on IE
+  try {
+    if ('undefined' != typeof XMLHttpRequest && (!xdomain || hasCORS)) {
+      return new XMLHttpRequest();
+    }
+  } catch (e) { }
+
+  // Use XDomainRequest for IE8 if enablesXDR is true
+  // because loading bar keeps flashing when using jsonp-polling
+  // https://github.com/yujiosaka/socke.io-ie8-loading-example
+  try {
+    if ('undefined' != typeof XDomainRequest && !xscheme && enablesXDR) {
+      return new XDomainRequest();
+    }
+  } catch (e) { }
+
+  if (!xdomain) {
+    try {
+      return new ActiveXObject('Microsoft.XMLHTTP');
+    } catch(e) { }
+  }
+}
+
+},{"has-cors":22}],11:[function(_dereq_,module,exports){
+module.exports = after
+
+function after(count, callback, err_cb) {
+    var bail = false
+    err_cb = err_cb || noop
+    proxy.count = count
+
+    return (count === 0) ? callback() : proxy
+
+    function proxy(err, result) {
+        if (proxy.count <= 0) {
+            throw new Error('after called too many times')
+        }
+        --proxy.count
+
+        // after first error, rest are passed to err_cb
+        if (err) {
+            bail = true
+            callback(err)
+            // future error callbacks will go to error handler
+            callback = err_cb
+        } else if (proxy.count === 0 && !bail) {
+            callback(null, result)
+        }
+    }
+}
+
+function noop() {}
+
+},{}],12:[function(_dereq_,module,exports){
+/**
+ * An abstraction for slicing an arraybuffer even when
+ * ArrayBuffer.prototype.slice is not supported
+ *
+ * @api public
+ */
+
+module.exports = function(arraybuffer, start, end) {
+  var bytes = arraybuffer.byteLength;
+  start = start || 0;
+  end = end || bytes;
+
+  if (arraybuffer.slice) { return arraybuffer.slice(start, end); }
+
+  if (start < 0) { start += bytes; }
+  if (end < 0) { end += bytes; }
+  if (end > bytes) { end = bytes; }
+
+  if (start >= bytes || start >= end || bytes === 0) {
+    return new ArrayBuffer(0);
+  }
+
+  var abv = new Uint8Array(arraybuffer);
+  var result = new Uint8Array(end - start);
+  for (var i = start, ii = 0; i < end; i++, ii++) {
+    result[ii] = abv[i];
+  }
+  return result.buffer;
+};
+
+},{}],13:[function(_dereq_,module,exports){
+/*
+ * base64-arraybuffer
+ * https://github.com/niklasvh/base64-arraybuffer
+ *
+ * Copyright (c) 2012 Niklas von Hertzen
+ * Licensed under the MIT license.
+ */
+(function(chars){
+  "use strict";
+
+  exports.encode = function(arraybuffer) {
+    var bytes = new Uint8Array(arraybuffer),
+    i, len = bytes.length, base64 = "";
+
+    for (i = 0; i < len; i+=3) {
+      base64 += chars[bytes[i] >> 2];
+      base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
+      base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
+      base64 += chars[bytes[i + 2] & 63];
+    }
+
+    if ((len % 3) === 2) {
+      base64 = base64.substring(0, base64.length - 1) + "=";
+    } else if (len % 3 === 1) {
+      base64 = base64.substring(0, base64.length - 2) + "==";
+    }
+
+    return base64;
+  };
+
+  exports.decode =  function(base64) {
+    var bufferLength = base64.length * 0.75,
+    len = base64.length, i, p = 0,
+    encoded1, encoded2, encoded3, encoded4;
+
+    if (base64[base64.length - 1] === "=") {
+      bufferLength--;
+      if (base64[base64.length - 2] === "=") {
+        bufferLength--;
+      }
+    }
+
+    var arraybuffer = new ArrayBuffer(bufferLength),
+    bytes = new Uint8Array(arraybuffer);
+
+    for (i = 0; i < len; i+=4) {
+      encoded1 = chars.indexOf(base64[i]);
+      encoded2 = chars.indexOf(base64[i+1]);
+      encoded3 = chars.indexOf(base64[i+2]);
+      encoded4 = chars.indexOf(base64[i+3]);
+
+      bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
+      bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
+      bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
+    }
+
+    return arraybuffer;
+  };
+})("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");
+
+},{}],14:[function(_dereq_,module,exports){
+(function (global){
+/**
+ * Create a blob builder even when vendor prefixes exist
+ */
+
+var BlobBuilder = global.BlobBuilder
+  || global.WebKitBlobBuilder
+  || global.MSBlobBuilder
+  || global.MozBlobBuilder;
+
+/**
+ * Check if Blob constructor is supported
+ */
+
+var blobSupported = (function() {
+  try {
+    var a = new Blob(['hi']);
+    return a.size === 2;
+  } catch(e) {
+    return false;
+  }
+})();
+
+/**
+ * Check if Blob constructor supports ArrayBufferViews
+ * Fails in Safari 6, so we need to map to ArrayBuffers there.
+ */
+
+var blobSupportsArrayBufferView = blobSupported && (function() {
+  try {
+    var b = new Blob([new Uint8Array([1,2])]);
+    return b.size === 2;
+  } catch(e) {
+    return false;
+  }
+})();
+
+/**
+ * Check if BlobBuilder is supported
+ */
+
+var blobBuilderSupported = BlobBuilder
+  && BlobBuilder.prototype.append
+  && BlobBuilder.prototype.getBlob;
+
+/**
+ * Helper function that maps ArrayBufferViews to ArrayBuffers
+ * Used by BlobBuilder constructor and old browsers that didn't
+ * support it in the Blob constructor.
+ */
+
+function mapArrayBufferViews(ary) {
+  for (var i = 0; i < ary.length; i++) {
+    var chunk = ary[i];
+    if (chunk.buffer instanceof ArrayBuffer) {
+      var buf = chunk.buffer;
+
+      // if this is a subarray, make a copy so we only
+      // include the subarray region from the underlying buffer
+      if (chunk.byteLength !== buf.byteLength) {
+        var copy = new Uint8Array(chunk.byteLength);
+        copy.set(new Uint8Array(buf, chunk.byteOffset, chunk.byteLength));
+        buf = copy.buffer;
+      }
+
+      ary[i] = buf;
+    }
+  }
+}
+
+function BlobBuilderConstructor(ary, options) {
+  options = options || {};
+
+  var bb = new BlobBuilder();
+  mapArrayBufferViews(ary);
+
+  for (var i = 0; i < ary.length; i++) {
+    bb.append(ary[i]);
+  }
+
+  return (options.type) ? bb.getBlob(options.type) : bb.getBlob();
+};
+
+function BlobConstructor(ary, options) {
+  mapArrayBufferViews(ary);
+  return new Blob(ary, options || {});
+};
+
+module.exports = (function() {
+  if (blobSupported) {
+    return blobSupportsArrayBufferView ? global.Blob : BlobConstructor;
+  } else if (blobBuilderSupported) {
+    return BlobBuilderConstructor;
+  } else {
+    return undefined;
+  }
+})();
+
+}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
+},{}],15:[function(_dereq_,module,exports){
+
+/**
+ * Expose `Emitter`.
+ */
+
+module.exports = Emitter;
+
+/**
+ * Initialize a new `Emitter`.
+ *
+ * @api public
+ */
+
+function Emitter(obj) {
+  if (obj) return mixin(obj);
+};
+
+/**
+ * Mixin the emitter properties.
+ *
+ * @param {Object} obj
+ * @return {Object}
+ * @api private
+ */
+
+function mixin(obj) {
+  for (var key in Emitter.prototype) {
+    obj[key] = Emitter.prototype[key];
+  }
+  return obj;
+}
+
+/**
+ * Listen on the given `event` with `fn`.
+ *
+ * @param {String} event
+ * @param {Function} fn
+ * @return {Emitter}
+ * @api public
+ */
+
+Emitter.prototype.on =
+Emitter.prototype.addEventListener = function(event, fn){
+  this._callbacks = this._callbacks || {};
+  (this._callbacks[event] = this._callbacks[event] || [])
+    .push(fn);
+  return this;
+};
+
+/**
+ * Adds an `event` listener that will be invoked a single
+ * time then automatically removed.
+ *
+ * @param {String} event
+ * @param {Function} fn
+ * @return {Emitter}
+ * @api public
+ */
+
+Emitter.prototype.once = function(event, fn){
+  var self = this;
+  this._callbacks = this._callbacks || {};
+
+  function on() {
+    self.off(event, on);
+    fn.apply(this, arguments);
+  }
+
+  on.fn = fn;
+  this.on(event, on);
+  return this;
+};
+
+/**
+ * Remove the given callback for `event` or all
+ * registered callbacks.
+ *
+ * @param {String} event
+ * @param {Function} fn
+ * @return {Emitter}
+ * @api public
+ */
+
+Emitter.prototype.off =
+Emitter.prototype.removeListener =
+Emitter.prototype.removeAllListeners =
+Emitter.prototype.removeEventListener = function(event, fn){
+  this._callbacks = this._callbacks || {};
+
+  // all
+  if (0 == arguments.length) {
+    this._callbacks = {};
+    return this;
+  }
+
+  // specific event
+  var callbacks = this._callbacks[event];
+  if (!callbacks) return this;
+
+  // remove all handlers
+  if (1 == arguments.length) {
+    delete this._callbacks[event];
+    return this;
+  }
+
+  // remove specific handler
+  var cb;
+  for (var i = 0; i < callbacks.length; i++) {
+    cb = callbacks[i];
+    if (cb === fn || cb.fn === fn) {
+      callbacks.splice(i, 1);
+      break;
+    }
+  }
+  return this;
+};
+
+/**
+ * Emit `event` with the given args.
+ *
+ * @param {String} event
+ * @param {Mixed} ...
+ * @return {Emitter}
+ */
+
+Emitter.prototype.emit = function(event){
+  this._callbacks = this._callbacks || {};
+  var args = [].slice.call(arguments, 1)
+    , callbacks = this._callbacks[event];
+
+  if (callbacks) {
+    callbacks = callbacks.slice(0);
+    for (var i = 0, len = callbacks.length; i < len; ++i) {
+      callbacks[i].apply(this, args);
+    }
+  }
+
+  return this;
+};
+
+/**
+ * Return array of callbacks for `event`.
+ *
+ * @param {String} event
+ * @return {Array}
+ * @api public
+ */
+
+Emitter.prototype.listeners = function(event){
+  this._callbacks = this._callbacks || {};
+  return this._callbacks[event] || [];
+};
+
+/**
+ * Check if this emitter has `event` handlers.
+ *
+ * @param {String} event
+ * @return {Boolean}
+ * @api public
+ */
+
+Emitter.prototype.hasListeners = function(event){
+  return !! this.listeners(event).length;
+};
+
+},{}],16:[function(_dereq_,module,exports){
+
+module.exports = function(a, b){
+  var fn = function(){};
+  fn.prototype = b.prototype;
+  a.prototype = new fn;
+  a.prototype.constructor = a;
+};
+},{}],17:[function(_dereq_,module,exports){
+
+/**
+ * This is the web browser implementation of `debug()`.
+ *
+ * Expose `debug()` as the module.
+ */
+
+exports = module.exports = _dereq_('./debug');
+exports.log = log;
+exports.formatArgs = formatArgs;
+exports.save = save;
+exports.load = load;
+exports.useColors = useColors;
+exports.storage = 'undefined' != typeof chrome
+               && 'undefined' != typeof chrome.storage
+                  ? chrome.storage.local
+                  : localstorage();
+
+/**
+ * Colors.
+ */
+
+exports.colors = [
+  'lightseagreen',
+  'forestgreen',
+  'goldenrod',
+  'dodgerblue',
+  'darkorchid',
+  'crimson'
+];
+
+/**
+ * Currently only WebKit-based Web Inspectors, Firefox >= v31,
+ * and the Firebug extension (any Firefox version) are known
+ * to support "%c" CSS customizations.
+ *
+ * TODO: add a `localStorage` variable to explicitly enable/disable colors
+ */
+
+function useColors() {
+  // is webkit? http://stackoverflow.com/a/16459606/376773
+  return ('WebkitAppearance' in document.documentElement.style) ||
+    // is firebug? http://stackoverflow.com/a/398120/376773
+    (window.console && (console.firebug || (console.exception && console.table))) ||
+    // is firefox >= v31?
+    // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
+    (navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31);
+}
+
+/**
+ * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
+ */
+
+exports.formatters.j = function(v) {
+  return JSON.stringify(v);
+};
+
+
+/**
+ * Colorize log arguments if enabled.
+ *
+ * @api public
+ */
+
+function formatArgs() {
+  var args = arguments;
+  var useColors = this.useColors;
+
+  args[0] = (useColors ? '%c' : '')
+    + this.namespace
+    + (useColors ? ' %c' : ' ')
+    + args[0]
+    + (useColors ? '%c ' : ' ')
+    + '+' + exports.humanize(this.diff);
+
+  if (!useColors) return args;
+
+  var c = 'color: ' + this.color;
+  args = [args[0], c, 'color: inherit'].concat(Array.prototype.slice.call(args, 1));
+
+  // the final "%c" is somewhat tricky, because there could be other
+  // arguments passed either before or after the %c, so we need to
+  // figure out the correct index to insert the CSS into
+  var index = 0;
+  var lastC = 0;
+  args[0].replace(/%[a-z%]/g, function(match) {
+    if ('%%' === match) return;
+    index++;
+    if ('%c' === match) {
+      // we only are interested in the *last* %c
+      // (the user may have provided their own)
+      lastC = index;
+    }
+  });
+
+  args.splice(lastC, 0, c);
+  return args;
+}
+
+/**
+ * Invokes `console.log()` when available.
+ * No-op when `console.log` is not a "function".
+ *
+ * @api public
+ */
+
+function log() {
+  // this hackery is required for IE8/9, where
+  // the `console.log` function doesn't have 'apply'
+  return 'object' === typeof console
+    && console.log
+    && Function.prototype.apply.call(console.log, console, arguments);
+}
+
+/**
+ * Save `namespaces`.
+ *
+ * @param {String} namespaces
+ * @api private
+ */
+
+function save(namespaces) {
+  try {
+    if (null == namespaces) {
+      exports.storage.removeItem('debug');
+    } else {
+      exports.storage.debug = namespaces;
+    }
+  } catch(e) {}
+}
+
+/**
+ * Load `namespaces`.
+ *
+ * @return {String} returns the previously persisted debug modes
+ * @api private
+ */
+
+function load() {
+  var r;
+  try {
+    r = exports.storage.debug;
+  } catch(e) {}
+  return r;
+}
+
+/**
+ * Enable namespaces listed in `localStorage.debug` initially.
+ */
+
+exports.enable(load());
+
+/**
+ * Localstorage attempts to return the localstorage.
+ *
+ * This is necessary because safari throws
+ * when a user disables cookies/localstorage
+ * and you attempt to access it.
+ *
+ * @return {LocalStorage}
+ * @api private
+ */
+
+function localstorage(){
+  try {
+    return window.localStorage;
+  } catch (e) {}
+}
+
+},{"./debug":18}],18:[function(_dereq_,module,exports){
+
+/**
+ * This is the common logic for both the Node.js and web browser
+ * implementations of `debug()`.
+ *
+ * Expose `debug()` as the module.
+ */
+
+exports = module.exports = debug;
+exports.coerce = coerce;
+exports.disable = disable;
+exports.enable = enable;
+exports.enabled = enabled;
+exports.humanize = _dereq_('ms');
+
+/**
+ * The currently active debug mode names, and names to skip.
+ */
+
+exports.names = [];
+exports.skips = [];
+
+/**
+ * Map of special "%n" handling functions, for the debug "format" argument.
+ *
+ * Valid key names are a single, lowercased letter, i.e. "n".
+ */
+
+exports.formatters = {};
+
+/**
+ * Previously assigned color.
+ */
+
+var prevColor = 0;
+
+/**
+ * Previous log timestamp.
+ */
+
+var prevTime;
+
+/**
+ * Select a color.
+ *
+ * @return {Number}
+ * @api private
+ */
+
+function selectColor() {
+  return exports.colors[prevColor++ % exports.colors.length];
+}
+
+/**
+ * Create a debugger with the given `namespace`.
+ *
+ * @param {String} namespace
+ * @return {Function}
+ * @api public
+ */
+
+function debug(namespace) {
+
+  // define the `disabled` version
+  function disabled() {
+  }
+  disabled.enabled = false;
+
+  // define the `enabled` version
+  function enabled() {
+
+    var self = enabled;
+
+    // set `diff` timestamp
+    var curr = +new Date();
+    var ms = curr - (prevTime || curr);
+    self.diff = ms;
+    self.prev = prevTime;
+    self.curr = curr;
+    prevTime = curr;
+
+    // add the `color` if not set
+    if (null == self.useColors) self.useColors = exports.useColors();
+    if (null == self.color && self.useColors) self.color = selectColor();
+
+    var args = Array.prototype.slice.call(arguments);
+
+    args[0] = exports.coerce(args[0]);
+
+    if ('string' !== typeof args[0]) {
+      // anything else let's inspect with %o
+      args = ['%o'].concat(args);
+    }
+
+    // apply any `formatters` transformations
+    var index = 0;
+    args[0] = args[0].replace(/%([a-z%])/g, function(match, format) {
+      // if we encounter an escaped % then don't increase the array index
+      if (match === '%%') return match;
+      index++;
+      var formatter = exports.formatters[format];
+      if ('function' === typeof formatter) {
+        var val = args[index];
+        match = formatter.call(self, val);
+
+        // now we need to remove `args[index]` since it's inlined in the `format`
+        args.splice(index, 1);
+        index--;
+      }
+      return match;
+    });
+
+    if ('function' === typeof exports.formatArgs) {
+      args = exports.formatArgs.apply(self, args);
+    }
+    var logFn = enabled.log || exports.log || console.log.bind(console);
+    logFn.apply(self, args);
+  }
+  enabled.enabled = true;
+
+  var fn = exports.enabled(namespace) ? enabled : disabled;
+
+  fn.namespace = namespace;
+
+  return fn;
+}
+
+/**
+ * Enables a debug mode by namespaces. This can include modes
+ * separated by a colon and wildcards.
+ *
+ * @param {String} namespaces
+ * @api public
+ */
+
+function enable(namespaces) {
+  exports.save(namespaces);
+
+  var split = (namespaces || '').split(/[\s,]+/);
+  var len = split.length;
+
+  for (var i = 0; i < len; i++) {
+    if (!split[i]) continue; // ignore empty strings
+    namespaces = split[i].replace(/\*/g, '.*?');
+    if (namespaces[0] === '-') {
+      exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
+    } else {
+      exports.names.push(new RegExp('^' + namespaces + '$'));
+    }
+  }
+}
+
+/**
+ * Disable debug output.
+ *
+ * @api public
+ */
+
+function disable() {
+  exports.enable('');
+}
+
+/**
+ * Returns true if the given mode name is enabled, false otherwise.
+ *
+ * @param {String} name
+ * @return {Boolean}
+ * @api public
+ */
+
+function enabled(name) {
+  var i, len;
+  for (i = 0, len = exports.skips.length; i < len; i++) {
+    if (exports.skips[i].test(name)) {
+      return false;
+    }
+  }
+  for (i = 0, len = exports.names.length; i < len; i++) {
+    if (exports.names[i].test(name)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * Coerce `val`.
+ *
+ * @param {Mixed} val
+ * @return {Mixed}
+ * @api private
+ */
+
+function coerce(val) {
+  if (val instanceof Error) return val.stack || val.message;
+  return val;
+}
+
+},{"ms":25}],19:[function(_dereq_,module,exports){
+(function (global){
+/**
+ * Module dependencies.
+ */
+
+var keys = _dereq_('./keys');
+var hasBinary = _dereq_('has-binary');
+var sliceBuffer = _dereq_('arraybuffer.slice');
+var base64encoder = _dereq_('base64-arraybuffer');
+var after = _dereq_('after');
+var utf8 = _dereq_('utf8');
+
+/**
+ * Check if we are running an android browser. That requires us to use
+ * ArrayBuffer with polling transports...
+ *
+ * http://ghinda.net/jpeg-blob-ajax-android/
+ */
+
+var isAndroid = navigator.userAgent.match(/Android/i);
+
+/**
+ * Check if we are running in PhantomJS.
+ * Uploading a Blob with PhantomJS does not work correctly, as reported here:
+ * https://github.com/ariya/phantomjs/issues/11395
+ * @type boolean
+ */
+var isPhantomJS = /PhantomJS/i.test(navigator.userAgent);
+
+/**
+ * When true, avoids using Blobs to encode payloads.
+ * @type boolean
+ */
+var dontSendBlobs = isAndroid || isPhantomJS;
+
+/**
+ * Current protocol version.
+ */
+
+exports.protocol = 3;
+
+/**
+ * Packet types.
+ */
+
+var packets = exports.packets = {
+    open:     0    // non-ws
+  , close:    1    // non-ws
+  , ping:     2
+  , pong:     3
+  , message:  4
+  , upgrade:  5
+  , noop:     6
+};
+
+var packetslist = keys(packets);
+
+/**
+ * Premade error packet.
+ */
+
+var err = { type: 'error', data: 'parser error' };
+
+/**
+ * Create a blob api even for blob builder when vendor prefixes exist
+ */
+
+var Blob = _dereq_('blob');
+
+/**
+ * Encodes a packet.
+ *
+ *     <packet type id> [ <data> ]
+ *
+ * Example:
+ *
+ *     5hello world
+ *     3
+ *     4
+ *
+ * Binary is encoded in an identical principle
+ *
+ * @api private
+ */
+
+exports.encodePacket = function (packet, supportsBinary, utf8encode, callback) {
+  if ('function' == typeof supportsBinary) {
+    callback = supportsBinary;
+    supportsBinary = false;
+  }
+
+  if ('function' == typeof utf8encode) {
+    callback = utf8encode;
+    utf8encode = null;
+  }
+
+  var data = (packet.data === undefined)
+    ? undefined
+    : packet.data.buffer || packet.data;
+
+  if (global.ArrayBuffer && data instanceof ArrayBuffer) {
+    return encodeArrayBuffer(packet, supportsBinary, callback);
+  } else if (Blob && data instanceof global.Blob) {
+    return encodeBlob(packet, supportsBinary, callback);
+  }
+
+  // might be an object with { base64: true, data: dataAsBase64String }
+  if (data && data.base64) {
+    return encodeBase64Object(packet, callback);
+  }
+
+  // Sending data as a utf-8 string
+  var encoded = packets[packet.type];
+
+  // data fragment is optional
+  if (undefined !== packet.data) {
+    encoded += utf8encode ? utf8.encode(String(packet.data)) : String(packet.data);
+  }
+
+  return callback('' + encoded);
+
+};
+
+function encodeBase64Object(packet, callback) {
+  // packet data is an object { base64: true, data: dataAsBase64String }
+  var message = 'b' + exports.packets[packet.type] + packet.data.data;
+  return callback(message);
+}
+
+/**
+ * Encode packet helpers for binary types
+ */
+
+function encodeArrayBuffer(packet, supportsBinary, callback) {
+  if (!supportsBinary) {
+    return exports.encodeBase64Packet(packet, callback);
+  }
+
+  var data = packet.data;
+  var contentArray = new Uint8Array(data);
+  var resultBuffer = new Uint8Array(1 + data.byteLength);
+
+  resultBuffer[0] = packets[packet.type];
+  for (var i = 0; i < contentArray.length; i++) {
+    resultBuffer[i+1] = contentArray[i];
+  }
+
+  return callback(resultBuffer.buffer);
+}
+
+function encodeBlobAsArrayBuffer(packet, supportsBinary, callback) {
+  if (!supportsBinary) {
+    return exports.encodeBase64Packet(packet, callback);
+  }
+
+  var fr = new FileReader();
+  fr.onload = function() {
+    packet.data = fr.result;
+    exports.encodePacket(packet, supportsBinary, true, callback);
+  };
+  return fr.readAsArrayBuffer(packet.data);
+}
+
+function encodeBlob(packet, supportsBinary, callback) {
+  if (!supportsBinary) {
+    return exports.encodeBase64Packet(packet, callback);
+  }
+
+  if (dontSendBlobs) {
+    return encodeBlobAsArrayBuffer(packet, supportsBinary, callback);
+  }
+
+  var length = new Uint8Array(1);
+  length[0] = packets[packet.type];
+  var blob = new Blob([length.buffer, packet.data]);
+
+  return callback(blob);
+}
+
+/**
+ * Encodes a packet with binary data in a base64 string
+ *
+ * @param {Object} packet, has `type` and `data`
+ * @return {String} base64 encoded message
+ */
+
+exports.encodeBase64Packet = function(packet, callback) {
+  var message = 'b' + exports.packets[packet.type];
+  if (Blob && packet.data instanceof global.Blob) {
+    var fr = new FileReader();
+    fr.onload = function() {
+      var b64 = fr.result.split(',')[1];
+      callback(message + b64);
+    };
+    return fr.readAsDataURL(packet.data);
+  }
+
+  var b64data;
+  try {
+    b64data = String.fromCharCode.apply(null, new Uint8Array(packet.data));
+  } catch (e) {
+    // iPhone Safari doesn't let you apply with typed arrays
+    var typed = new Uint8Array(packet.data);
+    var basic = new Array(typed.length);
+    for (var i = 0; i < typed.length; i++) {
+      basic[i] = typed[i];
+    }
+    b64data = String.fromCharCode.apply(null, basic);
+  }
+  message += global.btoa(b64data);
+  return callback(message);
+};
+
+/**
+ * Decodes a packet. Changes format to Blob if requested.
+ *
+ * @return {Object} with `type` and `data` (if any)
+ * @api private
+ */
+
+exports.decodePacket = function (data, binaryType, utf8decode) {
+  // String data
+  if (typeof data == 'string' || data === undefined) {
+    if (data.charAt(0) == 'b') {
+      return exports.decodeBase64Packet(data.substr(1), binaryType);
+    }
+
+    if (utf8decode) {
+      try {
+        data = utf8.decode(data);
+      } catch (e) {
+        return err;
+      }
+    }
+    var type = data.charAt(0);
+
+    if (Number(type) != type || !packetslist[type]) {
+      return err;
+    }
+
+    if (data.length > 1) {
+      return { type: packetslist[type], data: data.substring(1) };
+    } else {
+      return { type: packetslist[type] };
+    }
+  }
+
+  var asArray = new Uint8Array(data);
+  var type = asArray[0];
+  var rest = sliceBuffer(data, 1);
+  if (Blob && binaryType === 'blob') {
+    rest = new Blob([rest]);
+  }
+  return { type: packetslist[type], data: rest };
+};
+
+/**
+ * Decodes a packet encoded in a base64 string
+ *
+ * @param {String} base64 encoded message
+ * @return {Object} with `type` and `data` (if any)
+ */
+
+exports.decodeBase64Packet = function(msg, binaryType) {
+  var type = packetslist[msg.charAt(0)];
+  if (!global.ArrayBuffer) {
+    return { type: type, data: { base64: true, data: msg.substr(1) } };
+  }
+
+  var data = base64encoder.decode(msg.substr(1));
+
+  if (binaryType === 'blob' && Blob) {
+    data = new Blob([data]);
+  }
+
+  return { type: type, data: data };
+};
+
+/**
+ * Encodes multiple messages (payload).
+ *
+ *     <length>:data
+ *
+ * Example:
+ *
+ *     11:hello world2:hi
+ *
+ * If any contents are binary, they will be encoded as base64 strings. Base64
+ * encoded strings are marked with a b before the length specifier
+ *
+ * @param {Array} packets
+ * @api private
+ */
+
+exports.encodePayload = function (packets, supportsBinary, callback) {
+  if (typeof supportsBinary == 'function') {
+    callback = supportsBinary;
+    supportsBinary = null;
+  }
+
+  var isBinary = hasBinary(packets);
+
+  if (supportsBinary && isBinary) {
+    if (Blob && !dontSendBlobs) {
+      return exports.encodePayloadAsBlob(packets, callback);
+    }
+
+    return exports.encodePayloadAsArrayBuffer(packets, callback);
+  }
+
+  if (!packets.length) {
+    return callback('0:');
+  }
+
+  function setLengthHeader(message) {
+    return message.length + ':' + message;
+  }
+
+  function encodeOne(packet, doneCallback) {
+    exports.encodePacket(packet, !isBinary ? false : supportsBinary, true, function(message) {
+      doneCallback(null, setLengthHeader(message));
+    });
+  }
+
+  map(packets, encodeOne, function(err, results) {
+    return callback(results.join(''));
+  });
+};
+
+/**
+ * Async array map using after
+ */
+
+function map(ary, each, done) {
+  var result = new Array(ary.length);
+  var next = after(ary.length, done);
+
+  var eachWithIndex = function(i, el, cb) {
+    each(el, function(error, msg) {
+      result[i] = msg;
+      cb(error, result);
+    });
+  };
+
+  for (var i = 0; i < ary.length; i++) {
+    eachWithIndex(i, ary[i], next);
+  }
+}
+
+/*
+ * Decodes data when a payload is maybe expected. Possible binary contents are
+ * decoded from their base64 representation
+ *
+ * @param {String} data, callback method
+ * @api public
+ */
+
+exports.decodePayload = function (data, binaryType, callback) {
+  if (typeof data != 'string') {
+    return exports.decodePayloadAsBinary(data, binaryType, callback);
+  }
+
+  if (typeof binaryType === 'function') {
+    callback = binaryType;
+    binaryType = null;
+  }
+
+  var packet;
+  if (data == '') {
+    // parser error - ignoring payload
+    return callback(err, 0, 1);
+  }
+
+  var length = ''
+    , n, msg;
+
+  for (var i = 0, l = data.length; i < l; i++) {
+    var chr = data.charAt(i);
+
+    if (':' != chr) {
+      length += chr;
+    } else {
+      if ('' == length || (length != (n = Number(length)))) {
+        // parser error - ignoring payload
+        return callback(err, 0, 1);
+      }
+
+      msg = data.substr(i + 1, n);
+
+      if (length != msg.length) {
+        // parser error - ignoring payload
+        return callback(err, 0, 1);
+      }
+
+      if (msg.length) {
+        packet = exports.decodePacket(msg, binaryType, true);
+
+        if (err.type == packet.type && err.data == packet.data) {
+          // parser error in individual packet - ignoring payload
+          return callback(err, 0, 1);
+        }
+
+        var ret = callback(packet, i + n, l);
+        if (false === ret) return;
+      }
+
+      // advance cursor
+      i += n;
+      length = '';
+    }
+  }
+
+  if (length != '') {
+    // parser error - ignoring payload
+    return callback(err, 0, 1);
+  }
+
+};
+
+/**
+ * Encodes multiple messages (payload) as binary.
+ *
+ * <1 = binary, 0 = string><number from 0-9><number from 0-9>[...]<number
+ * 255><data>
+ *
+ * Example:
+ * 1 3 255 1 2 3, if the binary contents are interpreted as 8 bit integers
+ *
+ * @param {Array} packets
+ * @return {ArrayBuffer} encoded payload
+ * @api private
+ */
+
+exports.encodePayloadAsArrayBuffer = function(packets, callback) {
+  if (!packets.length) {
+    return callback(new ArrayBuffer(0));
+  }
+
+  function encodeOne(packet, doneCallback) {
+    exports.encodePacket(packet, true, true, function(data) {
+      return doneCallback(null, data);
+    });
+  }
+
+  map(packets, encodeOne, function(err, encodedPackets) {
+    var totalLength = encodedPackets.reduce(function(acc, p) {
+      var len;
+      if (typeof p === 'string'){
+        len = p.length;
+      } else {
+        len = p.byteLength;
+      }
+      return acc + len.toString().length + len + 2; // string/binary identifier + separator = 2
+    }, 0);
+
+    var resultArray = new Uint8Array(totalLength);
+
+    var bufferIndex = 0;
+    encodedPackets.forEach(function(p) {
+      var isString = typeof p === 'string';
+      var ab = p;
+      if (isString) {
+        var view = new Uint8Array(p.length);
+        for (var i = 0; i < p.length; i++) {
+          view[i] = p.charCodeAt(i);
+        }
+        ab = view.buffer;
+      }
+
+      if (isString) { // not true binary
+        resultArray[bufferIndex++] = 0;
+      } else { // true binary
+        resultArray[bufferIndex++] = 1;
+      }
+
+      var lenStr = ab.byteLength.toString();
+      for (var i = 0; i < lenStr.length; i++) {
+        resultArray[bufferIndex++] = parseInt(lenStr[i]);
+      }
+      resultArray[bufferIndex++] = 255;
+
+      var view = new Uint8Array(ab);
+      for (var i = 0; i < view.length; i++) {
+        resultArray[bufferIndex++] = view[i];
+      }
+    });
+
+    return callback(resultArray.buffer);
+  });
+};
+
+/**
+ * Encode as Blob
+ */
+
+exports.encodePayloadAsBlob = function(packets, callback) {
+  function encodeOne(packet, doneCallback) {
+    exports.encodePacket(packet, true, true, function(encoded) {
+      var binaryIdentifier = new Uint8Array(1);
+      binaryIdentifier[0] = 1;
+      if (typeof encoded === 'string') {
+        var view = new Uint8Array(encoded.length);
+        for (var i = 0; i < encoded.length; i++) {
+          view[i] = encoded.charCodeAt(i);
+        }
+        encoded = view.buffer;
+        binaryIdentifier[0] = 0;
+      }
+
+      var len = (encoded instanceof ArrayBuffer)
+        ? encoded.byteLength
+        : encoded.size;
+
+      var lenStr = len.toString();
+      var lengthAry = new Uint8Array(lenStr.length + 1);
+      for (var i = 0; i < lenStr.length; i++) {
+        lengthAry[i] = parseInt(lenStr[i]);
+      }
+      lengthAry[lenStr.length] = 255;
+
+      if (Blob) {
+        var blob = new Blob([binaryIdentifier.buffer, lengthAry.buffer, encoded]);
+        doneCallback(null, blob);
+      }
+    });
+  }
+
+  map(packets, encodeOne, function(err, results) {
+    return callback(new Blob(results));
+  });
+};
+
+/*
+ * Decodes data when a payload is maybe expected. Strings are decoded by
+ * interpreting each byte as a key code for entries marked to start with 0. See
+ * description of encodePayloadAsBinary
+ *
+ * @param {ArrayBuffer} data, callback method
+ * @api public
+ */
+
+exports.decodePayloadAsBinary = function (data, binaryType, callback) {
+  if (typeof binaryType === 'function') {
+    callback = binaryType;
+    binaryType = null;
+  }
+
+  var bufferTail = data;
+  var buffers = [];
+
+  var numberTooLong = false;
+  while (bufferTail.byteLength > 0) {
+    var tailArray = new Uint8Array(bufferTail);
+    var isString = tailArray[0] === 0;
+    var msgLength = '';
+
+    for (var i = 1; ; i++) {
+      if (tailArray[i] == 255) break;
+
+      if (msgLength.length > 310) {
+        numberTooLong = true;
+        break;
+      }
+
+      msgLength += tailArray[i];
+    }
+
+    if(numberTooLong) return callback(err, 0, 1);
+
+    bufferTail = sliceBuffer(bufferTail, 2 + msgLength.length);
+    msgLength = parseInt(msgLength);
+
+    var msg = sliceBuffer(bufferTail, 0, msgLength);
+    if (isString) {
+      try {
+        msg = String.fromCharCode.apply(null, new Uint8Array(msg));
+      } catch (e) {
+        // iPhone Safari doesn't let you apply to typed arrays
+        var typed = new Uint8Array(msg);
+        msg = '';
+        for (var i = 0; i < typed.length; i++) {
+          msg += String.fromCharCode(typed[i]);
+        }
+      }
+    }
+
+    buffers.push(msg);
+    bufferTail = sliceBuffer(bufferTail, msgLength);
+  }
+
+  var total = buffers.length;
+  buffers.forEach(function(buffer, i) {
+    callback(exports.decodePacket(buffer, binaryType, true), i, total);
+  });
+};
+
+}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
+},{"./keys":20,"after":11,"arraybuffer.slice":12,"base64-arraybuffer":13,"blob":14,"has-binary":21,"utf8":29}],20:[function(_dereq_,module,exports){
+
+/**
+ * Gets the keys for an object.
+ *
+ * @return {Array} keys
+ * @api private
+ */
+
+module.exports = Object.keys || function keys (obj){
+  var arr = [];
+  var has = Object.prototype.hasOwnProperty;
+
+  for (var i in obj) {
+    if (has.call(obj, i)) {
+      arr.push(i);
+    }
+  }
+  return arr;
+};
+
+},{}],21:[function(_dereq_,module,exports){
+(function (global){
+
+/*
+ * Module requirements.
+ */
+
+var isArray = _dereq_('isarray');
+
+/**
+ * Module exports.
+ */
+
+module.exports = hasBinary;
+
+/**
+ * Checks for binary data.
+ *
+ * Right now only Buffer and ArrayBuffer are supported..
+ *
+ * @param {Object} anything
+ * @api public
+ */
+
+function hasBinary(data) {
+
+  function _hasBinary(obj) {
+    if (!obj) return false;
+
+    if ( (global.Buffer && global.Buffer.isBuffer(obj)) ||
+         (global.ArrayBuffer && obj instanceof ArrayBuffer) ||
+         (global.Blob && obj instanceof Blob) ||
+         (global.File && obj instanceof File)
+        ) {
+      return true;
+    }
+
+    if (isArray(obj)) {
+      for (var i = 0; i < obj.length; i++) {
+          if (_hasBinary(obj[i])) {
+              return true;
+          }
+      }
+    } else if (obj && 'object' == typeof obj) {
+      if (obj.toJSON) {
+        obj = obj.toJSON();
+      }
+
+      for (var key in obj) {
+        if (Object.prototype.hasOwnProperty.call(obj, key) && _hasBinary(obj[key])) {
+          return true;
+        }
+      }
+    }
+
+    return false;
+  }
+
+  return _hasBinary(data);
+}
+
+}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
+},{"isarray":24}],22:[function(_dereq_,module,exports){
+
+/**
+ * Module exports.
+ *
+ * Logic borrowed from Modernizr:
+ *
+ *   - https://github.com/Modernizr/Modernizr/blob/master/feature-detects/cors.js
+ */
+
+try {
+  module.exports = typeof XMLHttpRequest !== 'undefined' &&
+    'withCredentials' in new XMLHttpRequest();
+} catch (err) {
+  // if XMLHttp support is disabled in IE then it will throw
+  // when trying to create
+  module.exports = false;
+}
+
+},{}],23:[function(_dereq_,module,exports){
+
+var indexOf = [].indexOf;
+
+module.exports = function(arr, obj){
+  if (indexOf) return arr.indexOf(obj);
+  for (var i = 0; i < arr.length; ++i) {
+    if (arr[i] === obj) return i;
+  }
+  return -1;
+};
+},{}],24:[function(_dereq_,module,exports){
+module.exports = Array.isArray || function (arr) {
+  return Object.prototype.toString.call(arr) == '[object Array]';
+};
+
+},{}],25:[function(_dereq_,module,exports){
+/**
+ * Helpers.
+ */
+
+var s = 1000;
+var m = s * 60;
+var h = m * 60;
+var d = h * 24;
+var y = d * 365.25;
+
+/**
+ * Parse or format the given `val`.
+ *
+ * Options:
+ *
+ *  - `long` verbose formatting [false]
+ *
+ * @param {String|Number} val
+ * @param {Object} options
+ * @return {String|Number}
+ * @api public
+ */
+
+module.exports = function(val, options){
+  options = options || {};
+  if ('string' == typeof val) return parse(val);
+  return options.long
+    ? long(val)
+    : short(val);
+};
+
+/**
+ * Parse the given `str` and return milliseconds.
+ *
+ * @param {String} str
+ * @return {Number}
+ * @api private
+ */
+
+function parse(str) {
+  str = '' + str;
+  if (str.length > 10000) return;
+  var match = /^((?:\d+)?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|years?|yrs?|y)?$/i.exec(str);
+  if (!match) return;
+  var n = parseFloat(match[1]);
+  var type = (match[2] || 'ms').toLowerCase();
+  switch (type) {
+    case 'years':
+    case 'year':
+    case 'yrs':
+    case 'yr':
+    case 'y':
+      return n * y;
+    case 'days':
+    case 'day':
+    case 'd':
+      return n * d;
+    case 'hours':
+    case 'hour':
+    case 'hrs':
+    case 'hr':
+    case 'h':
+      return n * h;
+    case 'minutes':
+    case 'minute':
+    case 'mins':
+    case 'min':
+    case 'm':
+      return n * m;
+    case 'seconds':
+    case 'second':
+    case 'secs':
+    case 'sec':
+    case 's':
+      return n * s;
+    case 'milliseconds':
+    case 'millisecond':
+    case 'msecs':
+    case 'msec':
+    case 'ms':
+      return n;
+  }
+}
+
+/**
+ * Short format for `ms`.
+ *
+ * @param {Number} ms
+ * @return {String}
+ * @api private
+ */
+
+function short(ms) {
+  if (ms >= d) return Math.round(ms / d) + 'd';
+  if (ms >= h) return Math.round(ms / h) + 'h';
+  if (ms >= m) return Math.round(ms / m) + 'm';
+  if (ms >= s) return Math.round(ms / s) + 's';
+  return ms + 'ms';
+}
+
+/**
+ * Long format for `ms`.
+ *
+ * @param {Number} ms
+ * @return {String}
+ * @api private
+ */
+
+function long(ms) {
+  return plural(ms, d, 'day')
+    || plural(ms, h, 'hour')
+    || plural(ms, m, 'minute')
+    || plural(ms, s, 'second')
+    || ms + ' ms';
+}
+
+/**
+ * Pluralization helper.
+ */
+
+function plural(ms, n, name) {
+  if (ms < n) return;
+  if (ms < n * 1.5) return Math.floor(ms / n) + ' ' + name;
+  return Math.ceil(ms / n) + ' ' + name + 's';
+}
+
+},{}],26:[function(_dereq_,module,exports){
+(function (global){
+/**
+ * JSON parse.
+ *
+ * @see Based on jQuery#parseJSON (MIT) and JSON2
+ * @api private
+ */
+
+var rvalidchars = /^[\],:{}\s]*$/;
+var rvalidescape = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
+var rvalidtokens = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
+var rvalidbraces = /(?:^|:|,)(?:\s*\[)+/g;
+var rtrimLeft = /^\s+/;
+var rtrimRight = /\s+$/;
+
+module.exports = function parsejson(data) {
+  if ('string' != typeof data || !data) {
+    return null;
+  }
+
+  data = data.replace(rtrimLeft, '').replace(rtrimRight, '');
+
+  // Attempt to parse using the native JSON parser first
+  if (global.JSON && JSON.parse) {
+    return JSON.parse(data);
+  }
+
+  if (rvalidchars.test(data.replace(rvalidescape, '@')
+      .replace(rvalidtokens, ']')
+      .replace(rvalidbraces, ''))) {
+    return (new Function('return ' + data))();
+  }
+};
+}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
+},{}],27:[function(_dereq_,module,exports){
+/**
+ * Compiles a querystring
+ * Returns string representation of the object
+ *
+ * @param {Object}
+ * @api private
+ */
+
+exports.encode = function (obj) {
+  var str = '';
+
+  for (var i in obj) {
+    if (obj.hasOwnProperty(i)) {
+      if (str.length) str += '&';
+      str += encodeURIComponent(i) + '=' + encodeURIComponent(obj[i]);
+    }
+  }
+
+  return str;
+};
+
+/**
+ * Parses a simple querystring into an object
+ *
+ * @param {String} qs
+ * @api private
+ */
+
+exports.decode = function(qs){
+  var qry = {};
+  var pairs = qs.split('&');
+  for (var i = 0, l = pairs.length; i < l; i++) {
+    var pair = pairs[i].split('=');
+    qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
+  }
+  return qry;
+};
+
+},{}],28:[function(_dereq_,module,exports){
+/**
+ * Parses an URI
+ *
+ * @author Steven Levithan <stevenlevithan.com> (MIT license)
+ * @api private
+ */
+
+var re = /^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;
+
+var parts = [
+    'source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'
+];
+
+module.exports = function parseuri(str) {
+    var src = str,
+        b = str.indexOf('['),
+        e = str.indexOf(']');
+
+    if (b != -1 && e != -1) {
+        str = str.substring(0, b) + str.substring(b, e).replace(/:/g, ';') + str.substring(e, str.length);
+    }
+
+    var m = re.exec(str || ''),
+        uri = {},
+        i = 14;
+
+    while (i--) {
+        uri[parts[i]] = m[i] || '';
+    }
+
+    if (b != -1 && e != -1) {
+        uri.source = src;
+        uri.host = uri.host.substring(1, uri.host.length - 1).replace(/;/g, ':');
+        uri.authority = uri.authority.replace('[', '').replace(']', '').replace(/;/g, ':');
+        uri.ipv6uri = true;
+    }
+
+    return uri;
+};
+
+},{}],29:[function(_dereq_,module,exports){
+(function (global){
+/*! https://mths.be/utf8js v2.0.0 by @mathias */
+;(function(root) {
+
+	// Detect free variables `exports`
+	var freeExports = typeof exports == 'object' && exports;
+
+	// Detect free variable `module`
+	var freeModule = typeof module == 'object' && module &&
+		module.exports == freeExports && module;
+
+	// Detect free variable `global`, from Node.js or Browserified code,
+	// and use it as `root`
+	var freeGlobal = typeof global == 'object' && global;
+	if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
+		root = freeGlobal;
+	}
+
+	/*--------------------------------------------------------------------------*/
+
+	var stringFromCharCode = String.fromCharCode;
+
+	// Taken from https://mths.be/punycode
+	function ucs2decode(string) {
+		var output = [];
+		var counter = 0;
+		var length = string.length;
+		var value;
+		var extra;
+		while (counter < length) {
+			value = string.charCodeAt(counter++);
+			if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
+				// high surrogate, and there is a next character
+				extra = string.charCodeAt(counter++);
+				if ((extra & 0xFC00) == 0xDC00) { // low surrogate
+					output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
+				} else {
+					// unmatched surrogate; only append this code unit, in case the next
+					// code unit is the high surrogate of a surrogate pair
+					output.push(value);
+					counter--;
+				}
+			} else {
+				output.push(value);
+			}
+		}
+		return output;
+	}
+
+	// Taken from https://mths.be/punycode
+	function ucs2encode(array) {
+		var length = array.length;
+		var index = -1;
+		var value;
+		var output = '';
+		while (++index < length) {
+			value = array[index];
+			if (value > 0xFFFF) {
+				value -= 0x10000;
+				output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
+				value = 0xDC00 | value & 0x3FF;
+			}
+			output += stringFromCharCode(value);
+		}
+		return output;
+	}
+
+	function checkScalarValue(codePoint) {
+		if (codePoint >= 0xD800 && codePoint <= 0xDFFF) {
+			throw Error(
+				'Lone surrogate U+' + codePoint.toString(16).toUpperCase() +
+				' is not a scalar value'
+			);
+		}
+	}
+	/*--------------------------------------------------------------------------*/
+
+	function createByte(codePoint, shift) {
+		return stringFromCharCode(((codePoint >> shift) & 0x3F) | 0x80);
+	}
+
+	function encodeCodePoint(codePoint) {
+		if ((codePoint & 0xFFFFFF80) == 0) { // 1-byte sequence
+			return stringFromCharCode(codePoint);
+		}
+		var symbol = '';
+		if ((codePoint & 0xFFFFF800) == 0) { // 2-byte sequence
+			symbol = stringFromCharCode(((codePoint >> 6) & 0x1F) | 0xC0);
+		}
+		else if ((codePoint & 0xFFFF0000) == 0) { // 3-byte sequence
+			checkScalarValue(codePoint);
+			symbol = stringFromCharCode(((codePoint >> 12) & 0x0F) | 0xE0);
+			symbol += createByte(codePoint, 6);
+		}
+		else if ((codePoint & 0xFFE00000) == 0) { // 4-byte sequence
+			symbol = stringFromCharCode(((codePoint >> 18) & 0x07) | 0xF0);
+			symbol += createByte(codePoint, 12);
+			symbol += createByte(codePoint, 6);
+		}
+		symbol += stringFromCharCode((codePoint & 0x3F) | 0x80);
+		return symbol;
+	}
+
+	function utf8encode(string) {
+		var codePoints = ucs2decode(string);
+		var length = codePoints.length;
+		var index = -1;
+		var codePoint;
+		var byteString = '';
+		while (++index < length) {
+			codePoint = codePoints[index];
+			byteString += encodeCodePoint(codePoint);
+		}
+		return byteString;
+	}
+
+	/*--------------------------------------------------------------------------*/
+
+	function readContinuationByte() {
+		if (byteIndex >= byteCount) {
+			throw Error('Invalid byte index');
+		}
+
+		var continuationByte = byteArray[byteIndex] & 0xFF;
+		byteIndex++;
+
+		if ((continuationByte & 0xC0) == 0x80) {
+			return continuationByte & 0x3F;
+		}
+
+		// If we end up here, it’s not a continuation byte
+		throw Error('Invalid continuation byte');
+	}
+
+	function decodeSymbol() {
+		var byte1;
+		var byte2;
+		var byte3;
+		var byte4;
+		var codePoint;
+
+		if (byteIndex > byteCount) {
+			throw Error('Invalid byte index');
+		}
+
+		if (byteIndex == byteCount) {
+			return false;
+		}
+
+		// Read first byte
+		byte1 = byteArray[byteIndex] & 0xFF;
+		byteIndex++;
+
+		// 1-byte sequence (no continuation bytes)
+		if ((byte1 & 0x80) == 0) {
+			return byte1;
+		}
+
+		// 2-byte sequence
+		if ((byte1 & 0xE0) == 0xC0) {
+			var byte2 = readContinuationByte();
+			codePoint = ((byte1 & 0x1F) << 6) | byte2;
+			if (codePoint >= 0x80) {
+				return codePoint;
+			} else {
+				throw Error('Invalid continuation byte');
+			}
+		}
+
+		// 3-byte sequence (may include unpaired surrogates)
+		if ((byte1 & 0xF0) == 0xE0) {
+			byte2 = readContinuationByte();
+			byte3 = readContinuationByte();
+			codePoint = ((byte1 & 0x0F) << 12) | (byte2 << 6) | byte3;
+			if (codePoint >= 0x0800) {
+				checkScalarValue(codePoint);
+				return codePoint;
+			} else {
+				throw Error('Invalid continuation byte');
+			}
+		}
+
+		// 4-byte sequence
+		if ((byte1 & 0xF8) == 0xF0) {
+			byte2 = readContinuationByte();
+			byte3 = readContinuationByte();
+			byte4 = readContinuationByte();
+			codePoint = ((byte1 & 0x0F) << 0x12) | (byte2 << 0x0C) |
+				(byte3 << 0x06) | byte4;
+			if (codePoint >= 0x010000 && codePoint <= 0x10FFFF) {
+				return codePoint;
+			}
+		}
+
+		throw Error('Invalid UTF-8 detected');
+	}
+
+	var byteArray;
+	var byteCount;
+	var byteIndex;
+	function utf8decode(byteString) {
+		byteArray = ucs2decode(byteString);
+		byteCount = byteArray.length;
+		byteIndex = 0;
+		var codePoints = [];
+		var tmp;
+		while ((tmp = decodeSymbol()) !== false) {
+			codePoints.push(tmp);
+		}
+		return ucs2encode(codePoints);
+	}
+
+	/*--------------------------------------------------------------------------*/
+
+	var utf8 = {
+		'version': '2.0.0',
+		'encode': utf8encode,
+		'decode': utf8decode
+	};
+
+	// Some AMD build optimizers, like r.js, check for specific condition patterns
+	// like the following:
+	if (
+		typeof define == 'function' &&
+		typeof define.amd == 'object' &&
+		define.amd
+	) {
+		define(function() {
+			return utf8;
+		});
+	}	else if (freeExports && !freeExports.nodeType) {
+		if (freeModule) { // in Node.js or RingoJS v0.8.0+
+			freeModule.exports = utf8;
+		} else { // in Narwhal or RingoJS v0.7.0-
+			var object = {};
+			var hasOwnProperty = object.hasOwnProperty;
+			for (var key in utf8) {
+				hasOwnProperty.call(utf8, key) && (freeExports[key] = utf8[key]);
+			}
+		}
+	} else { // in Rhino or a web browser
+		root.utf8 = utf8;
+	}
+
+}(this));
+
+}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
+},{}],30:[function(_dereq_,module,exports){
+'use strict';
+
+var alphabet = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_'.split('')
+  , length = 64
+  , map = {}
+  , seed = 0
+  , i = 0
+  , prev;
+
+/**
+ * Return a string representing the specified number.
+ *
+ * @param {Number} num The number to convert.
+ * @returns {String} The string representation of the number.
+ * @api public
+ */
+function encode(num) {
+  var encoded = '';
+
+  do {
+    encoded = alphabet[num % length] + encoded;
+    num = Math.floor(num / length);
+  } while (num > 0);
+
+  return encoded;
+}
+
+/**
+ * Return the integer value specified by the given string.
+ *
+ * @param {String} str The string to convert.
+ * @returns {Number} The integer value represented by the string.
+ * @api public
+ */
+function decode(str) {
+  var decoded = 0;
+
+  for (i = 0; i < str.length; i++) {
+    decoded = decoded * length + map[str.charAt(i)];
+  }
+
+  return decoded;
+}
+
+/**
+ * Yeast: A tiny growing id generator.
+ *
+ * @returns {String} A unique id.
+ * @api public
+ */
+function yeast() {
+  var now = encode(+new Date());
+
+  if (now !== prev) return seed = 0, prev = now;
+  return now +'.'+ encode(seed++);
+}
+
+//
+// Map each character to its index.
+//
+for (; i < length; i++) map[alphabet[i]] = i;
+
+//
+// Expose the `yeast`, `encode` and `decode` functions.
+//
+yeast.encode = encode;
+yeast.decode = decode;
+module.exports = yeast;
+
+},{}],31:[function(_dereq_,module,exports){
+
+/**
+ * Module dependencies.
+ */
+
+var url = _dereq_('./url');
+var parser = _dereq_('socket.io-parser');
+var Manager = _dereq_('./manager');
+var debug = _dereq_('debug')('socket.io-client');
+
+/**
+ * Module exports.
+ */
+
+module.exports = exports = lookup;
+
+/**
+ * Managers cache.
+ */
+
+var cache = exports.managers = {};
+
+/**
+ * Looks up an existing `Manager` for multiplexing.
+ * If the user summons:
+ *
+ *   `io('http://localhost/a');`
+ *   `io('http://localhost/b');`
+ *
+ * We reuse the existing instance based on same scheme/port/host,
+ * and we initialize sockets for each namespace.
+ *
+ * @api public
+ */
+
+function lookup(uri, opts) {
+  if (typeof uri == 'object') {
+    opts = uri;
+    uri = undefined;
+  }
+
+  opts = opts || {};
+
+  var parsed = url(uri);
+  var source = parsed.source;
+  var id = parsed.id;
+  var path = parsed.path;
+  var sameNamespace = cache[id] && path in cache[id].nsps;
+  var newConnection = opts.forceNew || opts['force new connection'] ||
+                      false === opts.multiplex || sameNamespace;
+
+  var io;
+
+  if (newConnection) {
+    debug('ignoring socket cache for %s', source);
+    io = Manager(source, opts);
+  } else {
+    if (!cache[id]) {
+      debug('new io instance for %s', source);
+      cache[id] = Manager(source, opts);
+    }
+    io = cache[id];
+  }
+
+  return io.socket(parsed.path);
+}
+
+/**
+ * Protocol version.
+ *
+ * @api public
+ */
+
+exports.protocol = parser.protocol;
+
+/**
+ * `connect`.
+ *
+ * @param {String} uri
+ * @api public
+ */
+
+exports.connect = lookup;
+
+/**
+ * Expose constructors for standalone build.
+ *
+ * @api public
+ */
+
+exports.Manager = _dereq_('./manager');
+exports.Socket = _dereq_('./socket');
+
+},{"./manager":32,"./socket":34,"./url":35,"debug":39,"socket.io-parser":47}],32:[function(_dereq_,module,exports){
+
+/**
+ * Module dependencies.
+ */
+
+var eio = _dereq_('engine.io-client');
+var Socket = _dereq_('./socket');
+var Emitter = _dereq_('component-emitter');
+var parser = _dereq_('socket.io-parser');
+var on = _dereq_('./on');
+var bind = _dereq_('component-bind');
+var debug = _dereq_('debug')('socket.io-client:manager');
+var indexOf = _dereq_('indexof');
+var Backoff = _dereq_('backo2');
+
+/**
+ * IE6+ hasOwnProperty
+ */
+
+var has = Object.prototype.hasOwnProperty;
+
+/**
+ * Module exports
+ */
+
+module.exports = Manager;
+
+/**
+ * `Manager` constructor.
+ *
+ * @param {String} engine instance or engine uri/opts
+ * @param {Object} options
+ * @api public
+ */
+
+function Manager(uri, opts){
+  if (!(this instanceof Manager)) return new Manager(uri, opts);
+  if (uri && ('object' == typeof uri)) {
+    opts = uri;
+    uri = undefined;
+  }
+  opts = opts || {};
+
+  opts.path = opts.path || '/socket.io';
+  this.nsps = {};
+  this.subs = [];
+  this.opts = opts;
+  this.reconnection(opts.reconnection !== false);
+  this.reconnectionAttempts(opts.reconnectionAttempts || Infinity);
+  this.reconnectionDelay(opts.reconnectionDelay || 1000);
+  this.reconnectionDelayMax(opts.reconnectionDelayMax || 5000);
+  this.randomizationFactor(opts.randomizationFactor || 0.5);
+  this.backoff = new Backoff({
+    min: this.reconnectionDelay(),
+    max: this.reconnectionDelayMax(),
+    jitter: this.randomizationFactor()
+  });
+  this.timeout(null == opts.timeout ? 20000 : opts.timeout);
+  this.readyState = 'closed';
+  this.uri = uri;
+  this.connecting = [];
+  this.lastPing = null;
+  this.encoding = false;
+  this.packetBuffer = [];
+  this.encoder = new parser.Encoder();
+  this.decoder = new parser.Decoder();
+  this.autoConnect = opts.autoConnect !== false;
+  if (this.autoConnect) this.open();
+}
+
+/**
+ * Propagate given event to sockets and emit on `this`
+ *
+ * @api private
+ */
+
+Manager.prototype.emitAll = function() {
+  this.emit.apply(this, arguments);
+  for (var nsp in this.nsps) {
+    if (has.call(this.nsps, nsp)) {
+      this.nsps[nsp].emit.apply(this.nsps[nsp], arguments);
+    }
+  }
+};
+
+/**
+ * Update `socket.id` of all sockets
+ *
+ * @api private
+ */
+
+Manager.prototype.updateSocketIds = function(){
+  for (var nsp in this.nsps) {
+    if (has.call(this.nsps, nsp)) {
+      this.nsps[nsp].id = this.engine.id;
+    }
+  }
+};
+
+/**
+ * Mix in `Emitter`.
+ */
+
+Emitter(Manager.prototype);
+
+/**
+ * Sets the `reconnection` config.
+ *
+ * @param {Boolean} true/false if it should automatically reconnect
+ * @return {Manager} self or value
+ * @api public
+ */
+
+Manager.prototype.reconnection = function(v){
+  if (!arguments.length) return this._reconnection;
+  this._reconnection = !!v;
+  return this;
+};
+
+/**
+ * Sets the reconnection attempts config.
+ *
+ * @param {Number} max reconnection attempts before giving up
+ * @return {Manager} self or value
+ * @api public
+ */
+
+Manager.prototype.reconnectionAttempts = function(v){
+  if (!arguments.length) return this._reconnectionAttempts;
+  this._reconnectionAttempts = v;
+  return this;
+};
+
+/**
+ * Sets the delay between reconnections.
+ *
+ * @param {Number} delay
+ * @return {Manager} self or value
+ * @api public
+ */
+
+Manager.prototype.reconnectionDelay = function(v){
+  if (!arguments.length) return this._reconnectionDelay;
+  this._reconnectionDelay = v;
+  this.backoff && this.backoff.setMin(v);
+  return this;
+};
+
+Manager.prototype.randomizationFactor = function(v){
+  if (!arguments.length) return this._randomizationFactor;
+  this._randomizationFactor = v;
+  this.backoff && this.backoff.setJitter(v);
+  return this;
+};
+
+/**
+ * Sets the maximum delay between reconnections.
+ *
+ * @param {Number} delay
+ * @return {Manager} self or value
+ * @api public
+ */
+
+Manager.prototype.reconnectionDelayMax = function(v){
+  if (!arguments.length) return this._reconnectionDelayMax;
+  this._reconnectionDelayMax = v;
+  this.backoff && this.backoff.setMax(v);
+  return this;
+};
+
+/**
+ * Sets the connection timeout. `false` to disable
+ *
+ * @return {Manager} self or value
+ * @api public
+ */
+
+Manager.prototype.timeout = function(v){
+  if (!arguments.length) return this._timeout;
+  this._timeout = v;
+  return this;
+};
+
+/**
+ * Starts trying to reconnect if reconnection is enabled and we have not
+ * started reconnecting yet
+ *
+ * @api private
+ */
+
+Manager.prototype.maybeReconnectOnOpen = function() {
+  // Only try to reconnect if it's the first time we're connecting
+  if (!this.reconnecting && this._reconnection && this.backoff.attempts === 0) {
+    // keeps reconnection from firing twice for the same reconnection loop
+    this.reconnect();
+  }
+};
+
+
+/**
+ * Sets the current transport `socket`.
+ *
+ * @param {Function} optional, callback
+ * @return {Manager} self
+ * @api public
+ */
+
+Manager.prototype.open =
+Manager.prototype.connect = function(fn){
+  debug('readyState %s', this.readyState);
+  if (~this.readyState.indexOf('open')) return this;
+
+  debug('opening %s', this.uri);
+  this.engine = eio(this.uri, this.opts);
+  var socket = this.engine;
+  var self = this;
+  this.readyState = 'opening';
+  this.skipReconnect = false;
+
+  // emit `open`
+  var openSub = on(socket, 'open', function() {
+    self.onopen();
+    fn && fn();
+  });
+
+  // emit `connect_error`
+  var errorSub = on(socket, 'error', function(data){
+    debug('connect_error');
+    self.cleanup();
+    self.readyState = 'closed';
+    self.emitAll('connect_error', data);
+    if (fn) {
+      var err = new Error('Connection error');
+      err.data = data;
+      fn(err);
+    } else {
+      // Only do this if there is no fn to handle the error
+      self.maybeReconnectOnOpen();
+    }
+  });
+
+  // emit `connect_timeout`
+  if (false !== this._timeout) {
+    var timeout = this._timeout;
+    debug('connect attempt will timeout after %d', timeout);
+
+    // set timer
+    var timer = setTimeout(function(){
+      debug('connect attempt timed out after %d', timeout);
+      openSub.destroy();
+      socket.close();
+      socket.emit('error', 'timeout');
+      self.emitAll('connect_timeout', timeout);
+    }, timeout);
+
+    this.subs.push({
+      destroy: function(){
+        clearTimeout(timer);
+      }
+    });
+  }
+
+  this.subs.push(openSub);
+  this.subs.push(errorSub);
+
+  return this;
+};
+
+/**
+ * Called upon transport open.
+ *
+ * @api private
+ */
+
+Manager.prototype.onopen = function(){
+  debug('open');
+
+  // clear old subs
+  this.cleanup();
+
+  // mark as open
+  this.readyState = 'open';
+  this.emit('open');
+
+  // add new subs
+  var socket = this.engine;
+  this.subs.push(on(socket, 'data', bind(this, 'ondata')));
+  this.subs.push(on(socket, 'ping', bind(this, 'onping')));
+  this.subs.push(on(socket, 'pong', bind(this, 'onpong')));
+  this.subs.push(on(socket, 'error', bind(this, 'onerror')));
+  this.subs.push(on(socket, 'close', bind(this, 'onclose')));
+  this.subs.push(on(this.decoder, 'decoded', bind(this, 'ondecoded')));
+};
+
+/**
+ * Called upon a ping.
+ *
+ * @api private
+ */
+
+Manager.prototype.onping = function(){
+  this.lastPing = new Date;
+  this.emitAll('ping');
+};
+
+/**
+ * Called upon a packet.
+ *
+ * @api private
+ */
+
+Manager.prototype.onpong = function(){
+  this.emitAll('pong', new Date - this.lastPing);
+};
+
+/**
+ * Called with data.
+ *
+ * @api private
+ */
+
+Manager.prototype.ondata = function(data){
+  this.decoder.add(data);
+};
+
+/**
+ * Called when parser fully decodes a packet.
+ *
+ * @api private
+ */
+
+Manager.prototype.ondecoded = function(packet) {
+  this.emit('packet', packet);
+};
+
+/**
+ * Called upon socket error.
+ *
+ * @api private
+ */
+
+Manager.prototype.onerror = function(err){
+  debug('error', err);
+  this.emitAll('error', err);
+};
+
+/**
+ * Creates a new socket for the given `nsp`.
+ *
+ * @return {Socket}
+ * @api public
+ */
+
+Manager.prototype.socket = function(nsp){
+  var socket = this.nsps[nsp];
+  if (!socket) {
+    socket = new Socket(this, nsp);
+    this.nsps[nsp] = socket;
+    var self = this;
+    socket.on('connecting', onConnecting);
+    socket.on('connect', function(){
+      socket.id = self.engine.id;
+    });
+
+    if (this.autoConnect) {
+      // manually call here since connecting evnet is fired before listening
+      onConnecting();
+    }
+  }
+
+  function onConnecting() {
+    if (!~indexOf(self.connecting, socket)) {
+      self.connecting.push(socket);
+    }
+  }
+
+  return socket;
+};
+
+/**
+ * Called upon a socket close.
+ *
+ * @param {Socket} socket
+ */
+
+Manager.prototype.destroy = function(socket){
+  var index = indexOf(this.connecting, socket);
+  if (~index) this.connecting.splice(index, 1);
+  if (this.connecting.length) return;
+
+  this.close();
+};
+
+/**
+ * Writes a packet.
+ *
+ * @param {Object} packet
+ * @api private
+ */
+
+Manager.prototype.packet = function(packet){
+  debug('writing packet %j', packet);
+  var self = this;
+
+  if (!self.encoding) {
+    // encode, then write to engine with result
+    self.encoding = true;
+    this.encoder.encode(packet, function(encodedPackets) {
+      for (var i = 0; i < encodedPackets.length; i++) {
+        self.engine.write(encodedPackets[i], packet.options);
+      }
+      self.encoding = false;
+      self.processPacketQueue();
+    });
+  } else { // add packet to the queue
+    self.packetBuffer.push(packet);
+  }
+};
+
+/**
+ * If packet buffer is non-empty, begins encoding the
+ * next packet in line.
+ *
+ * @api private
+ */
+
+Manager.prototype.processPacketQueue = function() {
+  if (this.packetBuffer.length > 0 && !this.encoding) {
+    var pack = this.packetBuffer.shift();
+    this.packet(pack);
+  }
+};
+
+/**
+ * Clean up transport subscriptions and packet buffer.
+ *
+ * @api private
+ */
+
+Manager.prototype.cleanup = function(){
+  debug('cleanup');
+
+  var sub;
+  while (sub = this.subs.shift()) sub.destroy();
+
+  this.packetBuffer = [];
+  this.encoding = false;
+  this.lastPing = null;
+
+  this.decoder.destroy();
+};
+
+/**
+ * Close the current socket.
+ *
+ * @api private
+ */
+
+Manager.prototype.close =
+Manager.prototype.disconnect = function(){
+  debug('disconnect');
+  this.skipReconnect = true;
+  this.reconnecting = false;
+  if ('opening' == this.readyState) {
+    // `onclose` will not fire because
+    // an open event never happened
+    this.cleanup();
+  }
+  this.backoff.reset();
+  this.readyState = 'closed';
+  if (this.engine) this.engine.close();
+};
+
+/**
+ * Called upon engine close.
+ *
+ * @api private
+ */
+
+Manager.prototype.onclose = function(reason){
+  debug('onclose');
+
+  this.cleanup();
+  this.backoff.reset();
+  this.readyState = 'closed';
+  this.emit('close', reason);
+
+  if (this._reconnection && !this.skipReconnect) {
+    this.reconnect();
+  }
+};
+
+/**
+ * Attempt a reconnection.
+ *
+ * @api private
+ */
+
+Manager.prototype.reconnect = function(){
+  if (this.reconnecting || this.skipReconnect) return this;
+
+  var self = this;
+
+  if (this.backoff.attempts >= this._reconnectionAttempts) {
+    debug('reconnect failed');
+    this.backoff.reset();
+    this.emitAll('reconnect_failed');
+    this.reconnecting = false;
+  } else {
+    var delay = this.backoff.duration();
+    debug('will wait %dms before reconnect attempt', delay);
+
+    this.reconnecting = true;
+    var timer = setTimeout(function(){
+      if (self.skipReconnect) return;
+
+      debug('attempting reconnect');
+      self.emitAll('reconnect_attempt', self.backoff.attempts);
+      self.emitAll('reconnecting', self.backoff.attempts);
+
+      // check again for the case socket closed in above events
+      if (self.skipReconnect) return;
+
+      self.open(function(err){
+        if (err) {
+          debug('reconnect attempt error');
+          self.reconnecting = false;
+          self.reconnect();
+          self.emitAll('reconnect_error', err.data);
+        } else {
+          debug('reconnect success');
+          self.onreconnect();
+        }
+      });
+    }, delay);
+
+    this.subs.push({
+      destroy: function(){
+        clearTimeout(timer);
+      }
+    });
+  }
+};
+
+/**
+ * Called upon successful reconnect.
+ *
+ * @api private
+ */
+
+Manager.prototype.onreconnect = function(){
+  var attempt = this.backoff.attempts;
+  this.reconnecting = false;
+  this.backoff.reset();
+  this.updateSocketIds();
+  this.emitAll('reconnect', attempt);
+};
+
+},{"./on":33,"./socket":34,"backo2":36,"component-bind":37,"component-emitter":38,"debug":39,"engine.io-client":1,"indexof":42,"socket.io-parser":47}],33:[function(_dereq_,module,exports){
+
+/**
+ * Module exports.
+ */
+
+module.exports = on;
+
+/**
+ * Helper for subscriptions.
+ *
+ * @param {Object|EventEmitter} obj with `Emitter` mixin or `EventEmitter`
+ * @param {String} event name
+ * @param {Function} callback
+ * @api public
+ */
+
+function on(obj, ev, fn) {
+  obj.on(ev, fn);
+  return {
+    destroy: function(){
+      obj.removeListener(ev, fn);
+    }
+  };
+}
+
+},{}],34:[function(_dereq_,module,exports){
+
+/**
+ * Module dependencies.
+ */
+
+var parser = _dereq_('socket.io-parser');
+var Emitter = _dereq_('component-emitter');
+var toArray = _dereq_('to-array');
+var on = _dereq_('./on');
+var bind = _dereq_('component-bind');
+var debug = _dereq_('debug')('socket.io-client:socket');
+var hasBin = _dereq_('has-binary');
+
+/**
+ * Module exports.
+ */
+
+module.exports = exports = Socket;
+
+/**
+ * Internal events (blacklisted).
+ * These events can't be emitted by the user.
+ *
+ * @api private
+ */
+
+var events = {
+  connect: 1,
+  connect_error: 1,
+  connect_timeout: 1,
+  connecting: 1,
+  disconnect: 1,
+  error: 1,
+  reconnect: 1,
+  reconnect_attempt: 1,
+  reconnect_failed: 1,
+  reconnect_error: 1,
+  reconnecting: 1,
+  ping: 1,
+  pong: 1
+};
+
+/**
+ * Shortcut to `Emitter#emit`.
+ */
+
+var emit = Emitter.prototype.emit;
+
+/**
+ * `Socket` constructor.
+ *
+ * @api public
+ */
+
+function Socket(io, nsp){
+  this.io = io;
+  this.nsp = nsp;
+  this.json = this; // compat
+  this.ids = 0;
+  this.acks = {};
+  this.receiveBuffer = [];
+  this.sendBuffer = [];
+  this.connected = false;
+  this.disconnected = true;
+  if (this.io.autoConnect) this.open();
+}
+
+/**
+ * Mix in `Emitter`.
+ */
+
+Emitter(Socket.prototype);
+
+/**
+ * Subscribe to open, close and packet events
+ *
+ * @api private
+ */
+
+Socket.prototype.subEvents = function() {
+  if (this.subs) return;
+
+  var io = this.io;
+  this.subs = [
+    on(io, 'open', bind(this, 'onopen')),
+    on(io, 'packet', bind(this, 'onpacket')),
+    on(io, 'close', bind(this, 'onclose'))
+  ];
+};
+
+/**
+ * "Opens" the socket.
+ *
+ * @api public
+ */
+
+Socket.prototype.open =
+Socket.prototype.connect = function(){
+  if (this.connected) return this;
+
+  this.subEvents();
+  this.io.open(); // ensure open
+  if ('open' == this.io.readyState) this.onopen();
+  this.emit('connecting');
+  return this;
+};
+
+/**
+ * Sends a `message` event.
+ *
+ * @return {Socket} self
+ * @api public
+ */
+
+Socket.prototype.send = function(){
+  var args = toArray(arguments);
+  args.unshift('message');
+  this.emit.apply(this, args);
+  return this;
+};
+
+/**
+ * Override `emit`.
+ * If the event is in `events`, it's emitted normally.
+ *
+ * @param {String} event name
+ * @return {Socket} self
+ * @api public
+ */
+
+Socket.prototype.emit = function(ev){
+  if (events.hasOwnProperty(ev)) {
+    emit.apply(this, arguments);
+    return this;
+  }
+
+  var args = toArray(arguments);
+  var parserType = parser.EVENT; // default
+  if (hasBin(args)) { parserType = parser.BINARY_EVENT; } // binary
+  var packet = { type: parserType, data: args };
+
+  packet.options = {};
+  packet.options.compress = !this.flags || false !== this.flags.compress;
+
+  // event ack callback
+  if ('function' == typeof args[args.length - 1]) {
+    debug('emitting packet with ack id %d', this.ids);
+    this.acks[this.ids] = args.pop();
+    packet.id = this.ids++;
+  }
+
+  if (this.connected) {
+    this.packet(packet);
+  } else {
+    this.sendBuffer.push(packet);
+  }
+
+  delete this.flags;
+
+  return this;
+};
+
+/**
+ * Sends a packet.
+ *
+ * @param {Object} packet
+ * @api private
+ */
+
+Socket.prototype.packet = function(packet){
+  packet.nsp = this.nsp;
+  this.io.packet(packet);
+};
+
+/**
+ * Called upon engine `open`.
+ *
+ * @api private
+ */
+
+Socket.prototype.onopen = function(){
+  debug('transport is open - connecting');
+
+  // write connect packet if necessary
+  if ('/' != this.nsp) {
+    this.packet({ type: parser.CONNECT });
+  }
+};
+
+/**
+ * Called upon engine `close`.
+ *
+ * @param {String} reason
+ * @api private
+ */
+
+Socket.prototype.onclose = function(reason){
+  debug('close (%s)', reason);
+  this.connected = false;
+  this.disconnected = true;
+  delete this.id;
+  this.emit('disconnect', reason);
+};
+
+/**
+ * Called with socket packet.
+ *
+ * @param {Object} packet
+ * @api private
+ */
+
+Socket.prototype.onpacket = function(packet){
+  if (packet.nsp != this.nsp) return;
+
+  switch (packet.type) {
+    case parser.CONNECT:
+      this.onconnect();
+      break;
+
+    case parser.EVENT:
+      this.onevent(packet);
+      break;
+
+    case parser.BINARY_EVENT:
+      this.onevent(packet);
+      break;
+
+    case parser.ACK:
+      this.onack(packet);
+      break;
+
+    case parser.BINARY_ACK:
+      this.onack(packet);
+      break;
+
+    case parser.DISCONNECT:
+      this.ondisconnect();
+      break;
+
+    case parser.ERROR:
+      this.emit('error', packet.data);
+      break;
+  }
+};
+
+/**
+ * Called upon a server event.
+ *
+ * @param {Object} packet
+ * @api private
+ */
+
+Socket.prototype.onevent = function(packet){
+  var args = packet.data || [];
+  debug('emitting event %j', args);
+
+  if (null != packet.id) {
+    debug('attaching ack callback to event');
+    args.push(this.ack(packet.id));
+  }
+
+  if (this.connected) {
+    emit.apply(this, args);
+  } else {
+    this.receiveBuffer.push(args);
+  }
+};
+
+/**
+ * Produces an ack callback to emit with an event.
+ *
+ * @api private
+ */
+
+Socket.prototype.ack = function(id){
+  var self = this;
+  var sent = false;
+  return function(){
+    // prevent double callbacks
+    if (sent) return;
+    sent = true;
+    var args = toArray(arguments);
+    debug('sending ack %j', args);
+
+    var type = hasBin(args) ? parser.BINARY_ACK : parser.ACK;
+    self.packet({
+      type: type,
+      id: id,
+      data: args
+    });
+  };
+};
+
+/**
+ * Called upon a server acknowlegement.
+ *
+ * @param {Object} packet
+ * @api private
+ */
+
+Socket.prototype.onack = function(packet){
+  var ack = this.acks[packet.id];
+  if ('function' == typeof ack) {
+    debug('calling ack %s with %j', packet.id, packet.data);
+    ack.apply(this, packet.data);
+    delete this.acks[packet.id];
+  } else {
+    debug('bad ack %s', packet.id);
+  }
+};
+
+/**
+ * Called upon server connect.
+ *
+ * @api private
+ */
+
+Socket.prototype.onconnect = function(){
+  this.connected = true;
+  this.disconnected = false;
+  this.emit('connect');
+  this.emitBuffered();
+};
+
+/**
+ * Emit buffered events (received and emitted).
+ *
+ * @api private
+ */
+
+Socket.prototype.emitBuffered = function(){
+  var i;
+  for (i = 0; i < this.receiveBuffer.length; i++) {
+    emit.apply(this, this.receiveBuffer[i]);
+  }
+  this.receiveBuffer = [];
+
+  for (i = 0; i < this.sendBuffer.length; i++) {
+    this.packet(this.sendBuffer[i]);
+  }
+  this.sendBuffer = [];
+};
+
+/**
+ * Called upon server disconnect.
+ *
+ * @api private
+ */
+
+Socket.prototype.ondisconnect = function(){
+  debug('server disconnect (%s)', this.nsp);
+  this.destroy();
+  this.onclose('io server disconnect');
+};
+
+/**
+ * Called upon forced client/server side disconnections,
+ * this method ensures the manager stops tracking us and
+ * that reconnections don't get triggered for this.
+ *
+ * @api private.
+ */
+
+Socket.prototype.destroy = function(){
+  if (this.subs) {
+    // clean subscriptions to avoid reconnections
+    for (var i = 0; i < this.subs.length; i++) {
+      this.subs[i].destroy();
+    }
+    this.subs = null;
+  }
+
+  this.io.destroy(this);
+};
+
+/**
+ * Disconnects the socket manually.
+ *
+ * @return {Socket} self
+ * @api public
+ */
+
+Socket.prototype.close =
+Socket.prototype.disconnect = function(){
+  if (this.connected) {
+    debug('performing disconnect (%s)', this.nsp);
+    this.packet({ type: parser.DISCONNECT });
+  }
+
+  // remove socket from pool
+  this.destroy();
+
+  if (this.connected) {
+    // fire events
+    this.onclose('io client disconnect');
+  }
+  return this;
+};
+
+/**
+ * Sets the compress flag.
+ *
+ * @param {Boolean} if `true`, compresses the sending data
+ * @return {Socket} self
+ * @api public
+ */
+
+Socket.prototype.compress = function(compress){
+  this.flags = this.flags || {};
+  this.flags.compress = compress;
+  return this;
+};
+
+},{"./on":33,"component-bind":37,"component-emitter":38,"debug":39,"has-binary":41,"socket.io-parser":47,"to-array":51}],35:[function(_dereq_,module,exports){
+(function (global){
+
+/**
+ * Module dependencies.
+ */
+
+var parseuri = _dereq_('parseuri');
+var debug = _dereq_('debug')('socket.io-client:url');
+
+/**
+ * Module exports.
+ */
+
+module.exports = url;
+
+/**
+ * URL parser.
+ *
+ * @param {String} url
+ * @param {Object} An object meant to mimic window.location.
+ *                 Defaults to window.location.
+ * @api public
+ */
+
+function url(uri, loc){
+  var obj = uri;
+
+  // default to window.location
+  var loc = loc || global.location;
+  if (null == uri) uri = loc.protocol + '//' + loc.host;
+
+  // relative path support
+  if ('string' == typeof uri) {
+    if ('/' == uri.charAt(0)) {
+      if ('/' == uri.charAt(1)) {
+        uri = loc.protocol + uri;
+      } else {
+        uri = loc.host + uri;
+      }
+    }
+
+    if (!/^(https?|wss?):\/\//.test(uri)) {
+      debug('protocol-less url %s', uri);
+      if ('undefined' != typeof loc) {
+        uri = loc.protocol + '//' + uri;
+      } else {
+        uri = 'https://' + uri;
+      }
+    }
+
+    // parse
+    debug('parse %s', uri);
+    obj = parseuri(uri);
+  }
+
+  // make sure we treat `localhost:80` and `localhost` equally
+  if (!obj.port) {
+    if (/^(http|ws)$/.test(obj.protocol)) {
+      obj.port = '80';
+    }
+    else if (/^(http|ws)s$/.test(obj.protocol)) {
+      obj.port = '443';
+    }
+  }
+
+  obj.path = obj.path || '/';
+
+  var ipv6 = obj.host.indexOf(':') !== -1;
+  var host = ipv6 ? '[' + obj.host + ']' : obj.host;
+
+  // define unique id
+  obj.id = obj.protocol + '://' + host + ':' + obj.port;
+  // define href
+  obj.href = obj.protocol + '://' + host + (loc && loc.port == obj.port ? '' : (':' + obj.port));
+
+  return obj;
+}
+
+}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
+},{"debug":39,"parseuri":45}],36:[function(_dereq_,module,exports){
+
+/**
+ * Expose `Backoff`.
+ */
+
+module.exports = Backoff;
+
+/**
+ * Initialize backoff timer with `opts`.
+ *
+ * - `min` initial timeout in milliseconds [100]
+ * - `max` max timeout [10000]
+ * - `jitter` [0]
+ * - `factor` [2]
+ *
+ * @param {Object} opts
+ * @api public
+ */
+
+function Backoff(opts) {
+  opts = opts || {};
+  this.ms = opts.min || 100;
+  this.max = opts.max || 10000;
+  this.factor = opts.factor || 2;
+  this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0;
+  this.attempts = 0;
+}
+
+/**
+ * Return the backoff duration.
+ *
+ * @return {Number}
+ * @api public
+ */
+
+Backoff.prototype.duration = function(){
+  var ms = this.ms * Math.pow(this.factor, this.attempts++);
+  if (this.jitter) {
+    var rand =  Math.random();
+    var deviation = Math.floor(rand * this.jitter * ms);
+    ms = (Math.floor(rand * 10) & 1) == 0  ? ms - deviation : ms + deviation;
+  }
+  return Math.min(ms, this.max) | 0;
+};
+
+/**
+ * Reset the number of attempts.
+ *
+ * @api public
+ */
+
+Backoff.prototype.reset = function(){
+  this.attempts = 0;
+};
+
+/**
+ * Set the minimum duration
+ *
+ * @api public
+ */
+
+Backoff.prototype.setMin = function(min){
+  this.ms = min;
+};
+
+/**
+ * Set the maximum duration
+ *
+ * @api public
+ */
+
+Backoff.prototype.setMax = function(max){
+  this.max = max;
+};
+
+/**
+ * Set the jitter
+ *
+ * @api public
+ */
+
+Backoff.prototype.setJitter = function(jitter){
+  this.jitter = jitter;
+};
+
+
+},{}],37:[function(_dereq_,module,exports){
+/**
+ * Slice reference.
+ */
+
+var slice = [].slice;
+
+/**
+ * Bind `obj` to `fn`.
+ *
+ * @param {Object} obj
+ * @param {Function|String} fn or string
+ * @return {Function}
+ * @api public
+ */
+
+module.exports = function(obj, fn){
+  if ('string' == typeof fn) fn = obj[fn];
+  if ('function' != typeof fn) throw new Error('bind() requires a function');
+  var args = slice.call(arguments, 2);
+  return function(){
+    return fn.apply(obj, args.concat(slice.call(arguments)));
+  }
+};
+
+},{}],38:[function(_dereq_,module,exports){
+
+/**
+ * Expose `Emitter`.
+ */
+
+module.exports = Emitter;
+
+/**
+ * Initialize a new `Emitter`.
+ *
+ * @api public
+ */
+
+function Emitter(obj) {
+  if (obj) return mixin(obj);
+};
+
+/**
+ * Mixin the emitter properties.
+ *
+ * @param {Object} obj
+ * @return {Object}
+ * @api private
+ */
+
+function mixin(obj) {
+  for (var key in Emitter.prototype) {
+    obj[key] = Emitter.prototype[key];
+  }
+  return obj;
+}
+
+/**
+ * Listen on the given `event` with `fn`.
+ *
+ * @param {String} event
+ * @param {Function} fn
+ * @return {Emitter}
+ * @api public
+ */
+
+Emitter.prototype.on =
+Emitter.prototype.addEventListener = function(event, fn){
+  this._callbacks = this._callbacks || {};
+  (this._callbacks['$' + event] = this._callbacks['$' + event] || [])
+    .push(fn);
+  return this;
+};
+
+/**
+ * Adds an `event` listener that will be invoked a single
+ * time then automatically removed.
+ *
+ * @param {String} event
+ * @param {Function} fn
+ * @return {Emitter}
+ * @api public
+ */
+
+Emitter.prototype.once = function(event, fn){
+  function on() {
+    this.off(event, on);
+    fn.apply(this, arguments);
+  }
+
+  on.fn = fn;
+  this.on(event, on);
+  return this;
+};
+
+/**
+ * Remove the given callback for `event` or all
+ * registered callbacks.
+ *
+ * @param {String} event
+ * @param {Function} fn
+ * @return {Emitter}
+ * @api public
+ */
+
+Emitter.prototype.off =
+Emitter.prototype.removeListener =
+Emitter.prototype.removeAllListeners =
+Emitter.prototype.removeEventListener = function(event, fn){
+  this._callbacks = this._callbacks || {};
+
+  // all
+  if (0 == arguments.length) {
+    this._callbacks = {};
+    return this;
+  }
+
+  // specific event
+  var callbacks = this._callbacks['$' + event];
+  if (!callbacks) return this;
+
+  // remove all handlers
+  if (1 == arguments.length) {
+    delete this._callbacks['$' + event];
+    return this;
+  }
+
+  // remove specific handler
+  var cb;
+  for (var i = 0; i < callbacks.length; i++) {
+    cb = callbacks[i];
+    if (cb === fn || cb.fn === fn) {
+      callbacks.splice(i, 1);
+      break;
+    }
+  }
+  return this;
+};
+
+/**
+ * Emit `event` with the given args.
+ *
+ * @param {String} event
+ * @param {Mixed} ...
+ * @return {Emitter}
+ */
+
+Emitter.prototype.emit = function(event){
+  this._callbacks = this._callbacks || {};
+  var args = [].slice.call(arguments, 1)
+    , callbacks = this._callbacks['$' + event];
+
+  if (callbacks) {
+    callbacks = callbacks.slice(0);
+    for (var i = 0, len = callbacks.length; i < len; ++i) {
+      callbacks[i].apply(this, args);
+    }
+  }
+
+  return this;
+};
+
+/**
+ * Return array of callbacks for `event`.
+ *
+ * @param {String} event
+ * @return {Array}
+ * @api public
+ */
+
+Emitter.prototype.listeners = function(event){
+  this._callbacks = this._callbacks || {};
+  return this._callbacks['$' + event] || [];
+};
+
+/**
+ * Check if this emitter has `event` handlers.
+ *
+ * @param {String} event
+ * @return {Boolean}
+ * @api public
+ */
+
+Emitter.prototype.hasListeners = function(event){
+  return !! this.listeners(event).length;
+};
+
+},{}],39:[function(_dereq_,module,exports){
+arguments[4][17][0].apply(exports,arguments)
+},{"./debug":40,"dup":17}],40:[function(_dereq_,module,exports){
+arguments[4][18][0].apply(exports,arguments)
+},{"dup":18,"ms":44}],41:[function(_dereq_,module,exports){
+(function (global){
+
+/*
+ * Module requirements.
+ */
+
+var isArray = _dereq_('isarray');
+
+/**
+ * Module exports.
+ */
+
+module.exports = hasBinary;
+
+/**
+ * Checks for binary data.
+ *
+ * Right now only Buffer and ArrayBuffer are supported..
+ *
+ * @param {Object} anything
+ * @api public
+ */
+
+function hasBinary(data) {
+
+  function _hasBinary(obj) {
+    if (!obj) return false;
+
+    if ( (global.Buffer && global.Buffer.isBuffer && global.Buffer.isBuffer(obj)) ||
+         (global.ArrayBuffer && obj instanceof ArrayBuffer) ||
+         (global.Blob && obj instanceof Blob) ||
+         (global.File && obj instanceof File)
+        ) {
+      return true;
+    }
+
+    if (isArray(obj)) {
+      for (var i = 0; i < obj.length; i++) {
+          if (_hasBinary(obj[i])) {
+              return true;
+          }
+      }
+    } else if (obj && 'object' == typeof obj) {
+      // see: https://github.com/Automattic/has-binary/pull/4
+      if (obj.toJSON && 'function' == typeof obj.toJSON) {
+        obj = obj.toJSON();
+      }
+
+      for (var key in obj) {
+        if (Object.prototype.hasOwnProperty.call(obj, key) && _hasBinary(obj[key])) {
+          return true;
+        }
+      }
+    }
+
+    return false;
+  }
+
+  return _hasBinary(data);
+}
+
+}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
+},{"isarray":43}],42:[function(_dereq_,module,exports){
+arguments[4][23][0].apply(exports,arguments)
+},{"dup":23}],43:[function(_dereq_,module,exports){
+arguments[4][24][0].apply(exports,arguments)
+},{"dup":24}],44:[function(_dereq_,module,exports){
+arguments[4][25][0].apply(exports,arguments)
+},{"dup":25}],45:[function(_dereq_,module,exports){
+arguments[4][28][0].apply(exports,arguments)
+},{"dup":28}],46:[function(_dereq_,module,exports){
+(function (global){
+/*global Blob,File*/
+
+/**
+ * Module requirements
+ */
+
+var isArray = _dereq_('isarray');
+var isBuf = _dereq_('./is-buffer');
+
+/**
+ * Replaces every Buffer | ArrayBuffer in packet with a numbered placeholder.
+ * Anything with blobs or files should be fed through removeBlobs before coming
+ * here.
+ *
+ * @param {Object} packet - socket.io event packet
+ * @return {Object} with deconstructed packet and list of buffers
+ * @api public
+ */
+
+exports.deconstructPacket = function(packet){
+  var buffers = [];
+  var packetData = packet.data;
+
+  function _deconstructPacket(data) {
+    if (!data) return data;
+
+    if (isBuf(data)) {
+      var placeholder = { _placeholder: true, num: buffers.length };
+      buffers.push(data);
+      return placeholder;
+    } else if (isArray(data)) {
+      var newData = new Array(data.length);
+      for (var i = 0; i < data.length; i++) {
+        newData[i] = _deconstructPacket(data[i]);
+      }
+      return newData;
+    } else if ('object' == typeof data && !(data instanceof Date)) {
+      var newData = {};
+      for (var key in data) {
+        newData[key] = _deconstructPacket(data[key]);
+      }
+      return newData;
+    }
+    return data;
+  }
+
+  var pack = packet;
+  pack.data = _deconstructPacket(packetData);
+  pack.attachments = buffers.length; // number of binary 'attachments'
+  return {packet: pack, buffers: buffers};
+};
+
+/**
+ * Reconstructs a binary packet from its placeholder packet and buffers
+ *
+ * @param {Object} packet - event packet with placeholders
+ * @param {Array} buffers - binary buffers to put in placeholder positions
+ * @return {Object} reconstructed packet
+ * @api public
+ */
+
+exports.reconstructPacket = function(packet, buffers) {
+  var curPlaceHolder = 0;
+
+  function _reconstructPacket(data) {
+    if (data && data._placeholder) {
+      var buf = buffers[data.num]; // appropriate buffer (should be natural order anyway)
+      return buf;
+    } else if (isArray(data)) {
+      for (var i = 0; i < data.length; i++) {
+        data[i] = _reconstructPacket(data[i]);
+      }
+      return data;
+    } else if (data && 'object' == typeof data) {
+      for (var key in data) {
+        data[key] = _reconstructPacket(data[key]);
+      }
+      return data;
+    }
+    return data;
+  }
+
+  packet.data = _reconstructPacket(packet.data);
+  packet.attachments = undefined; // no longer useful
+  return packet;
+};
+
+/**
+ * Asynchronously removes Blobs or Files from data via
+ * FileReader's readAsArrayBuffer method. Used before encoding
+ * data as msgpack. Calls callback with the blobless data.
+ *
+ * @param {Object} data
+ * @param {Function} callback
+ * @api private
+ */
+
+exports.removeBlobs = function(data, callback) {
+  function _removeBlobs(obj, curKey, containingObject) {
+    if (!obj) return obj;
+
+    // convert any blob
+    if ((global.Blob && obj instanceof Blob) ||
+        (global.File && obj instanceof File)) {
+      pendingBlobs++;
+
+      // async filereader
+      var fileReader = new FileReader();
+      fileReader.onload = function() { // this.result == arraybuffer
+        if (containingObject) {
+          containingObject[curKey] = this.result;
+        }
+        else {
+          bloblessData = this.result;
+        }
+
+        // if nothing pending its callback time
+        if(! --pendingBlobs) {
+          callback(bloblessData);
+        }
+      };
+
+      fileReader.readAsArrayBuffer(obj); // blob -> arraybuffer
+    } else if (isArray(obj)) { // handle array
+      for (var i = 0; i < obj.length; i++) {
+        _removeBlobs(obj[i], i, obj);
+      }
+    } else if (obj && 'object' == typeof obj && !isBuf(obj)) { // and object
+      for (var key in obj) {
+        _removeBlobs(obj[key], key, obj);
+      }
+    }
+  }
+
+  var pendingBlobs = 0;
+  var bloblessData = data;
+  _removeBlobs(bloblessData);
+  if (!pendingBlobs) {
+    callback(bloblessData);
+  }
+};
+
+}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
+},{"./is-buffer":48,"isarray":43}],47:[function(_dereq_,module,exports){
+
+/**
+ * Module dependencies.
+ */
+
+var debug = _dereq_('debug')('socket.io-parser');
+var json = _dereq_('json3');
+var isArray = _dereq_('isarray');
+var Emitter = _dereq_('component-emitter');
+var binary = _dereq_('./binary');
+var isBuf = _dereq_('./is-buffer');
+
+/**
+ * Protocol version.
+ *
+ * @api public
+ */
+
+exports.protocol = 4;
+
+/**
+ * Packet types.
+ *
+ * @api public
+ */
+
+exports.types = [
+  'CONNECT',
+  'DISCONNECT',
+  'EVENT',
+  'BINARY_EVENT',
+  'ACK',
+  'BINARY_ACK',
+  'ERROR'
+];
+
+/**
+ * Packet type `connect`.
+ *
+ * @api public
+ */
+
+exports.CONNECT = 0;
+
+/**
+ * Packet type `disconnect`.
+ *
+ * @api public
+ */
+
+exports.DISCONNECT = 1;
+
+/**
+ * Packet type `event`.
+ *
+ * @api public
+ */
+
+exports.EVENT = 2;
+
+/**
+ * Packet type `ack`.
+ *
+ * @api public
+ */
+
+exports.ACK = 3;
+
+/**
+ * Packet type `error`.
+ *
+ * @api public
+ */
+
+exports.ERROR = 4;
+
+/**
+ * Packet type 'binary event'
+ *
+ * @api public
+ */
+
+exports.BINARY_EVENT = 5;
+
+/**
+ * Packet type `binary ack`. For acks with binary arguments.
+ *
+ * @api public
+ */
+
+exports.BINARY_ACK = 6;
+
+/**
+ * Encoder constructor.
+ *
+ * @api public
+ */
+
+exports.Encoder = Encoder;
+
+/**
+ * Decoder constructor.
+ *
+ * @api public
+ */
+
+exports.Decoder = Decoder;
+
+/**
+ * A socket.io Encoder instance
+ *
+ * @api public
+ */
+
+function Encoder() {}
+
+/**
+ * Encode a packet as a single string if non-binary, or as a
+ * buffer sequence, depending on packet type.
+ *
+ * @param {Object} obj - packet object
+ * @param {Function} callback - function to handle encodings (likely engine.write)
+ * @return Calls callback with Array of encodings
+ * @api public
+ */
+
+Encoder.prototype.encode = function(obj, callback){
+  debug('encoding packet %j', obj);
+
+  if (exports.BINARY_EVENT == obj.type || exports.BINARY_ACK == obj.type) {
+    encodeAsBinary(obj, callback);
+  }
+  else {
+    var encoding = encodeAsString(obj);
+    callback([encoding]);
+  }
+};
+
+/**
+ * Encode packet as string.
+ *
+ * @param {Object} packet
+ * @return {String} encoded
+ * @api private
+ */
+
+function encodeAsString(obj) {
+  var str = '';
+  var nsp = false;
+
+  // first is type
+  str += obj.type;
+
+  // attachments if we have them
+  if (exports.BINARY_EVENT == obj.type || exports.BINARY_ACK == obj.type) {
+    str += obj.attachments;
+    str += '-';
+  }
+
+  // if we have a namespace other than `/`
+  // we append it followed by a comma `,`
+  if (obj.nsp && '/' != obj.nsp) {
+    nsp = true;
+    str += obj.nsp;
+  }
+
+  // immediately followed by the id
+  if (null != obj.id) {
+    if (nsp) {
+      str += ',';
+      nsp = false;
+    }
+    str += obj.id;
+  }
+
+  // json data
+  if (null != obj.data) {
+    if (nsp) str += ',';
+    str += json.stringify(obj.data);
+  }
+
+  debug('encoded %j as %s', obj, str);
+  return str;
+}
+
+/**
+ * Encode packet as 'buffer sequence' by removing blobs, and
+ * deconstructing packet into object with placeholders and
+ * a list of buffers.
+ *
+ * @param {Object} packet
+ * @return {Buffer} encoded
+ * @api private
+ */
+
+function encodeAsBinary(obj, callback) {
+
+  function writeEncoding(bloblessData) {
+    var deconstruction = binary.deconstructPacket(bloblessData);
+    var pack = encodeAsString(deconstruction.packet);
+    var buffers = deconstruction.buffers;
+
+    buffers.unshift(pack); // add packet info to beginning of data list
+    callback(buffers); // write all the buffers
+  }
+
+  binary.removeBlobs(obj, writeEncoding);
+}
+
+/**
+ * A socket.io Decoder instance
+ *
+ * @return {Object} decoder
+ * @api public
+ */
+
+function Decoder() {
+  this.reconstructor = null;
+}
+
+/**
+ * Mix in `Emitter` with Decoder.
+ */
+
+Emitter(Decoder.prototype);
+
+/**
+ * Decodes an ecoded packet string into packet JSON.
+ *
+ * @param {String} obj - encoded packet
+ * @return {Object} packet
+ * @api public
+ */
+
+Decoder.prototype.add = function(obj) {
+  var packet;
+  if ('string' == typeof obj) {
+    packet = decodeString(obj);
+    if (exports.BINARY_EVENT == packet.type || exports.BINARY_ACK == packet.type) { // binary packet's json
+      this.reconstructor = new BinaryReconstructor(packet);
+
+      // no attachments, labeled binary but no binary data to follow
+      if (this.reconstructor.reconPack.attachments === 0) {
+        this.emit('decoded', packet);
+      }
+    } else { // non-binary full packet
+      this.emit('decoded', packet);
+    }
+  }
+  else if (isBuf(obj) || obj.base64) { // raw binary data
+    if (!this.reconstructor) {
+      throw new Error('got binary data when not reconstructing a packet');
+    } else {
+      packet = this.reconstructor.takeBinaryData(obj);
+      if (packet) { // received final buffer
+        this.reconstructor = null;
+        this.emit('decoded', packet);
+      }
+    }
+  }
+  else {
+    throw new Error('Unknown type: ' + obj);
+  }
+};
+
+/**
+ * Decode a packet String (JSON data)
+ *
+ * @param {String} str
+ * @return {Object} packet
+ * @api private
+ */
+
+function decodeString(str) {
+  var p = {};
+  var i = 0;
+
+  // look up type
+  p.type = Number(str.charAt(0));
+  if (null == exports.types[p.type]) return error();
+
+  // look up attachments if type binary
+  if (exports.BINARY_EVENT == p.type || exports.BINARY_ACK == p.type) {
+    var buf = '';
+    while (str.charAt(++i) != '-') {
+      buf += str.charAt(i);
+      if (i == str.length) break;
+    }
+    if (buf != Number(buf) || str.charAt(i) != '-') {
+      throw new Error('Illegal attachments');
+    }
+    p.attachments = Number(buf);
+  }
+
+  // look up namespace (if any)
+  if ('/' == str.charAt(i + 1)) {
+    p.nsp = '';
+    while (++i) {
+      var c = str.charAt(i);
+      if (',' == c) break;
+      p.nsp += c;
+      if (i == str.length) break;
+    }
+  } else {
+    p.nsp = '/';
+  }
+
+  // look up id
+  var next = str.charAt(i + 1);
+  if ('' !== next && Number(next) == next) {
+    p.id = '';
+    while (++i) {
+      var c = str.charAt(i);
+      if (null == c || Number(c) != c) {
+        --i;
+        break;
+      }
+      p.id += str.charAt(i);
+      if (i == str.length) break;
+    }
+    p.id = Number(p.id);
+  }
+
+  // look up json data
+  if (str.charAt(++i)) {
+    try {
+      p.data = json.parse(str.substr(i));
+    } catch(e){
+      return error();
+    }
+  }
+
+  debug('decoded %s as %j', str, p);
+  return p;
+}
+
+/**
+ * Deallocates a parser's resources
+ *
+ * @api public
+ */
+
+Decoder.prototype.destroy = function() {
+  if (this.reconstructor) {
+    this.reconstructor.finishedReconstruction();
+  }
+};
+
+/**
+ * A manager of a binary event's 'buffer sequence'. Should
+ * be constructed whenever a packet of type BINARY_EVENT is
+ * decoded.
+ *
+ * @param {Object} packet
+ * @return {BinaryReconstructor} initialized reconstructor
+ * @api private
+ */
+
+function BinaryReconstructor(packet) {
+  this.reconPack = packet;
+  this.buffers = [];
+}
+
+/**
+ * Method to be called when binary data received from connection
+ * after a BINARY_EVENT packet.
+ *
+ * @param {Buffer | ArrayBuffer} binData - the raw binary data received
+ * @return {null | Object} returns null if more binary data is expected or
+ *   a reconstructed packet object if all buffers have been received.
+ * @api private
+ */
+
+BinaryReconstructor.prototype.takeBinaryData = function(binData) {
+  this.buffers.push(binData);
+  if (this.buffers.length == this.reconPack.attachments) { // done with buffer list
+    var packet = binary.reconstructPacket(this.reconPack, this.buffers);
+    this.finishedReconstruction();
+    return packet;
+  }
+  return null;
+};
+
+/**
+ * Cleans up binary packet reconstruction variables.
+ *
+ * @api private
+ */
+
+BinaryReconstructor.prototype.finishedReconstruction = function() {
+  this.reconPack = null;
+  this.buffers = [];
+};
+
+function error(data){
+  return {
+    type: exports.ERROR,
+    data: 'parser error'
+  };
+}
+
+},{"./binary":46,"./is-buffer":48,"component-emitter":49,"debug":39,"isarray":43,"json3":50}],48:[function(_dereq_,module,exports){
+(function (global){
+
+module.exports = isBuf;
+
+/**
+ * Returns true if obj is a buffer or an arraybuffer.
+ *
+ * @api private
+ */
+
+function isBuf(obj) {
+  return (global.Buffer && global.Buffer.isBuffer(obj)) ||
+         (global.ArrayBuffer && obj instanceof ArrayBuffer);
+}
+
+}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
+},{}],49:[function(_dereq_,module,exports){
+arguments[4][15][0].apply(exports,arguments)
+},{"dup":15}],50:[function(_dereq_,module,exports){
+(function (global){
+/*! JSON v3.3.2 | http://bestiejs.github.io/json3 | Copyright 2012-2014, Kit Cambridge | http://kit.mit-license.org */
+;(function () {
+  // Detect the `define` function exposed by asynchronous module loaders. The
+  // strict `define` check is necessary for compatibility with `r.js`.
+  var isLoader = typeof define === "function" && define.amd;
+
+  // A set of types used to distinguish objects from primitives.
+  var objectTypes = {
+    "function": true,
+    "object": true
+  };
+
+  // Detect the `exports` object exposed by CommonJS implementations.
+  var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports;
+
+  // Use the `global` object exposed by Node (including Browserify via
+  // `insert-module-globals`), Narwhal, and Ringo as the default context,
+  // and the `window` object in browsers. Rhino exports a `global` function
+  // instead.
+  var root = objectTypes[typeof window] && window || this,
+      freeGlobal = freeExports && objectTypes[typeof module] && module && !module.nodeType && typeof global == "object" && global;
+
+  if (freeGlobal && (freeGlobal["global"] === freeGlobal || freeGlobal["window"] === freeGlobal || freeGlobal["self"] === freeGlobal)) {
+    root = freeGlobal;
+  }
+
+  // Public: Initializes JSON 3 using the given `context` object, attaching the
+  // `stringify` and `parse` functions to the specified `exports` object.
+  function runInContext(context, exports) {
+    context || (context = root["Object"]());
+    exports || (exports = root["Object"]());
+
+    // Native constructor aliases.
+    var Number = context["Number"] || root["Number"],
+        String = context["String"] || root["String"],
+        Object = context["Object"] || root["Object"],
+        Date = context["Date"] || root["Date"],
+        SyntaxError = context["SyntaxError"] || root["SyntaxError"],
+        TypeError = context["TypeError"] || root["TypeError"],
+        Math = context["Math"] || root["Math"],
+        nativeJSON = context["JSON"] || root["JSON"];
+
+    // Delegate to the native `stringify` and `parse` implementations.
+    if (typeof nativeJSON == "object" && nativeJSON) {
+      exports.stringify = nativeJSON.stringify;
+      exports.parse = nativeJSON.parse;
+    }
+
+    // Convenience aliases.
+    var objectProto = Object.prototype,
+        getClass = objectProto.toString,
+        isProperty, forEach, undef;
+
+    // Test the `Date#getUTC*` methods. Based on work by @Yaffle.
+    var isExtended = new Date(-3509827334573292);
+    try {
+      // The `getUTCFullYear`, `Month`, and `Date` methods return nonsensical
+      // results for certain dates in Opera >= 10.53.
+      isExtended = isExtended.getUTCFullYear() == -109252 && isExtended.getUTCMonth() === 0 && isExtended.getUTCDate() === 1 &&
+        // Safari < 2.0.2 stores the internal millisecond time value correctly,
+        // but clips the values returned by the date methods to the range of
+        // signed 32-bit integers ([-2 ** 31, 2 ** 31 - 1]).
+        isExtended.getUTCHours() == 10 && isExtended.getUTCMinutes() == 37 && isExtended.getUTCSeconds() == 6 && isExtended.getUTCMilliseconds() == 708;
+    } catch (exception) {}
+
+    // Internal: Determines whether the native `JSON.stringify` and `parse`
+    // implementations are spec-compliant. Based on work by Ken Snyder.
+    function has(name) {
+      if (has[name] !== undef) {
+        // Return cached feature test result.
+        return has[name];
+      }
+      var isSupported;
+      if (name == "bug-string-char-index") {
+        // IE <= 7 doesn't support accessing string characters using square
+        // bracket notation. IE 8 only supports this for primitives.
+        isSupported = "a"[0] != "a";
+      } else if (name == "json") {
+        // Indicates whether both `JSON.stringify` and `JSON.parse` are
+        // supported.
+        isSupported = has("json-stringify") && has("json-parse");
+      } else {
+        var value, serialized = '{"a":[1,true,false,null,"\\u0000\\b\\n\\f\\r\\t"]}';
+        // Test `JSON.stringify`.
+        if (name == "json-stringify") {
+          var stringify = exports.stringify, stringifySupported = typeof stringify == "function" && isExtended;
+          if (stringifySupported) {
+            // A test function object with a custom `toJSON` method.
+            (value = function () {
+              return 1;
+            }).toJSON = value;
+            try {
+              stringifySupported =
+                // Firefox 3.1b1 and b2 serialize string, number, and boolean
+                // primitives as object literals.
+                stringify(0) === "0" &&
+                // FF 3.1b1, b2, and JSON 2 serialize wrapped primitives as object
+                // literals.
+                stringify(new Number()) === "0" &&
+                stringify(new String()) == '""' &&
+                // FF 3.1b1, 2 throw an error if the value is `null`, `undefined`, or
+                // does not define a canonical JSON representation (this applies to
+                // objects with `toJSON` properties as well, *unless* they are nested
+                // within an object or array).
+                stringify(getClass) === undef &&
+                // IE 8 serializes `undefined` as `"undefined"`. Safari <= 5.1.7 and
+                // FF 3.1b3 pass this test.
+                stringify(undef) === undef &&
+                // Safari <= 5.1.7 and FF 3.1b3 throw `Error`s and `TypeError`s,
+                // respectively, if the value is omitted entirely.
+                stringify() === undef &&
+                // FF 3.1b1, 2 throw an error if the given value is not a number,
+                // string, array, object, Boolean, or `null` literal. This applies to
+                // objects with custom `toJSON` methods as well, unless they are nested
+                // inside object or array literals. YUI 3.0.0b1 ignores custom `toJSON`
+                // methods entirely.
+                stringify(value) === "1" &&
+                stringify([value]) == "[1]" &&
+                // Prototype <= 1.6.1 serializes `[undefined]` as `"[]"` instead of
+                // `"[null]"`.
+                stringify([undef]) == "[null]" &&
+                // YUI 3.0.0b1 fails to serialize `null` literals.
+                stringify(null) == "null" &&
+                // FF 3.1b1, 2 halts serialization if an array contains a function:
+                // `[1, true, getClass, 1]` serializes as "[1,true,],". FF 3.1b3
+                // elides non-JSON values from objects and arrays, unless they
+                // define custom `toJSON` methods.
+                stringify([undef, getClass, null]) == "[null,null,null]" &&
+                // Simple serialization test. FF 3.1b1 uses Unicode escape sequences
+                // where character escape codes are expected (e.g., `\b` => `\u0008`).
+                stringify({ "a": [value, true, false, null, "\x00\b\n\f\r\t"] }) == serialized &&
+                // FF 3.1b1 and b2 ignore the `filter` and `width` arguments.
+                stringify(null, value) === "1" &&
+                stringify([1, 2], null, 1) == "[\n 1,\n 2\n]" &&
+                // JSON 2, Prototype <= 1.7, and older WebKit builds incorrectly
+                // serialize extended years.
+                stringify(new Date(-8.64e15)) == '"-271821-04-20T00:00:00.000Z"' &&
+                // The milliseconds are optional in ES 5, but required in 5.1.
+                stringify(new Date(8.64e15)) == '"+275760-09-13T00:00:00.000Z"' &&
+                // Firefox <= 11.0 incorrectly serializes years prior to 0 as negative
+                // four-digit years instead of six-digit years. Credits: @Yaffle.
+                stringify(new Date(-621987552e5)) == '"-000001-01-01T00:00:00.000Z"' &&
+                // Safari <= 5.1.5 and Opera >= 10.53 incorrectly serialize millisecond
+                // values less than 1000. Credits: @Yaffle.
+                stringify(new Date(-1)) == '"1969-12-31T23:59:59.999Z"';
+            } catch (exception) {
+              stringifySupported = false;
+            }
+          }
+          isSupported = stringifySupported;
+        }
+        // Test `JSON.parse`.
+        if (name == "json-parse") {
+          var parse = exports.parse;
+          if (typeof parse == "function") {
+            try {
+              // FF 3.1b1, b2 will throw an exception if a bare literal is provided.
+              // Conforming implementations should also coerce the initial argument to
+              // a string prior to parsing.
+              if (parse("0") === 0 && !parse(false)) {
+                // Simple parsing test.
+                value = parse(serialized);
+                var parseSupported = value["a"].length == 5 && value["a"][0] === 1;
+                if (parseSupported) {
+                  try {
+                    // Safari <= 5.1.2 and FF 3.1b1 allow unescaped tabs in strings.
+                    parseSupported = !parse('"\t"');
+                  } catch (exception) {}
+                  if (parseSupported) {
+                    try {
+                      // FF 4.0 and 4.0.1 allow leading `+` signs and leading
+                      // decimal points. FF 4.0, 4.0.1, and IE 9-10 also allow
+                      // certain octal literals.
+                      parseSupported = parse("01") !== 1;
+                    } catch (exception) {}
+                  }
+                  if (parseSupported) {
+                    try {
+                      // FF 4.0, 4.0.1, and Rhino 1.7R3-R4 allow trailing decimal
+                      // points. These environments, along with FF 3.1b1 and 2,
+                      // also allow trailing commas in JSON objects and arrays.
+                      parseSupported = parse("1.") !== 1;
+                    } catch (exception) {}
+                  }
+                }
+              }
+            } catch (exception) {
+              parseSupported = false;
+            }
+          }
+          isSupported = parseSupported;
+        }
+      }
+      return has[name] = !!isSupported;
+    }
+
+    if (!has("json")) {
+      // Common `[[Class]]` name aliases.
+      var functionClass = "[object Function]",
+          dateClass = "[object Date]",
+          numberClass = "[object Number]",
+          stringClass = "[object String]",
+          arrayClass = "[object Array]",
+          booleanClass = "[object Boolean]";
+
+      // Detect incomplete support for accessing string characters by index.
+      var charIndexBuggy = has("bug-string-char-index");
+
+      // Define additional utility methods if the `Date` methods are buggy.
+      if (!isExtended) {
+        var floor = Math.floor;
+        // A mapping between the months of the year and the number of days between
+        // January 1st and the first of the respective month.
+        var Months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];
+        // Internal: Calculates the number of days between the Unix epoch and the
+        // first day of the given month.
+        var getDay = function (year, month) {
+          return Months[month] + 365 * (year - 1970) + floor((year - 1969 + (month = +(month > 1))) / 4) - floor((year - 1901 + month) / 100) + floor((year - 1601 + month) / 400);
+        };
+      }
+
+      // Internal: Determines if a property is a direct property of the given
+      // object. Delegates to the native `Object#hasOwnProperty` method.
+      if (!(isProperty = objectProto.hasOwnProperty)) {
+        isProperty = function (property) {
+          var members = {}, constructor;
+          if ((members.__proto__ = null, members.__proto__ = {
+            // The *proto* property cannot be set multiple times in recent
+            // versions of Firefox and SeaMonkey.
+            "toString": 1
+          }, members).toString != getClass) {
+            // Safari <= 2.0.3 doesn't implement `Object#hasOwnProperty`, but
+            // supports the mutable *proto* property.
+            isProperty = function (property) {
+              // Capture and break the object's prototype chain (see section 8.6.2
+              // of the ES 5.1 spec). The parenthesized expression prevents an
+              // unsafe transformation by the Closure Compiler.
+              var original = this.__proto__, result = property in (this.__proto__ = null, this);
+              // Restore the original prototype chain.
+              this.__proto__ = original;
+              return result;
+            };
+          } else {
+            // Capture a reference to the top-level `Object` constructor.
+            constructor = members.constructor;
+            // Use the `constructor` property to simulate `Object#hasOwnProperty` in
+            // other environments.
+            isProperty = function (property) {
+              var parent = (this.constructor || constructor).prototype;
+              return property in this && !(property in parent && this[property] === parent[property]);
+            };
+          }
+          members = null;
+          return isProperty.call(this, property);
+        };
+      }
+
+      // Internal: Normalizes the `for...in` iteration algorithm across
+      // environments. Each enumerated key is yielded to a `callback` function.
+      forEach = function (object, callback) {
+        var size = 0, Properties, members, property;
+
+        // Tests for bugs in the current environment's `for...in` algorithm. The
+        // `valueOf` property inherits the non-enumerable flag from
+        // `Object.prototype` in older versions of IE, Netscape, and Mozilla.
+        (Properties = function () {
+          this.valueOf = 0;
+        }).prototype.valueOf = 0;
+
+        // Iterate over a new instance of the `Properties` class.
+        members = new Properties();
+        for (property in members) {
+          // Ignore all properties inherited from `Object.prototype`.
+          if (isProperty.call(members, property)) {
+            size++;
+          }
+        }
+        Properties = members = null;
+
+        // Normalize the iteration algorithm.
+        if (!size) {
+          // A list of non-enumerable properties inherited from `Object.prototype`.
+          members = ["valueOf", "toString", "toLocaleString", "propertyIsEnumerable", "isPrototypeOf", "hasOwnProperty", "constructor"];
+          // IE <= 8, Mozilla 1.0, and Netscape 6.2 ignore shadowed non-enumerable
+          // properties.
+          forEach = function (object, callback) {
+            var isFunction = getClass.call(object) == functionClass, property, length;
+            var hasProperty = !isFunction && typeof object.constructor != "function" && objectTypes[typeof object.hasOwnProperty] && object.hasOwnProperty || isProperty;
+            for (property in object) {
+              // Gecko <= 1.0 enumerates the `prototype` property of functions under
+              // certain conditions; IE does not.
+              if (!(isFunction && property == "prototype") && hasProperty.call(object, property)) {
+                callback(property);
+              }
+            }
+            // Manually invoke the callback for each non-enumerable property.
+            for (length = members.length; property = members[--length]; hasProperty.call(object, property) && callback(property));
+          };
+        } else if (size == 2) {
+          // Safari <= 2.0.4 enumerates shadowed properties twice.
+          forEach = function (object, callback) {
+            // Create a set of iterated properties.
+            var members = {}, isFunction = getClass.call(object) == functionClass, property;
+            for (property in object) {
+              // Store each property name to prevent double enumeration. The
+              // `prototype` property of functions is not enumerated due to cross-
+              // environment inconsistencies.
+              if (!(isFunction && property == "prototype") && !isProperty.call(members, property) && (members[property] = 1) && isProperty.call(object, property)) {
+                callback(property);
+              }
+            }
+          };
+        } else {
+          // No bugs detected; use the standard `for...in` algorithm.
+          forEach = function (object, callback) {
+            var isFunction = getClass.call(object) == functionClass, property, isConstructor;
+            for (property in object) {
+              if (!(isFunction && property == "prototype") && isProperty.call(object, property) && !(isConstructor = property === "constructor")) {
+                callback(property);
+              }
+            }
+            // Manually invoke the callback for the `constructor` property due to
+            // cross-environment inconsistencies.
+            if (isConstructor || isProperty.call(object, (property = "constructor"))) {
+              callback(property);
+            }
+          };
+        }
+        return forEach(object, callback);
+      };
+
+      // Public: Serializes a JavaScript `value` as a JSON string. The optional
+      // `filter` argument may specify either a function that alters how object and
+      // array members are serialized, or an array of strings and numbers that
+      // indicates which properties should be serialized. The optional `width`
+      // argument may be either a string or number that specifies the indentation
+      // level of the output.
+      if (!has("json-stringify")) {
+        // Internal: A map of control characters and their escaped equivalents.
+        var Escapes = {
+          92: "\\\\",
+          34: '\\"',
+          8: "\\b",
+          12: "\\f",
+          10: "\\n",
+          13: "\\r",
+          9: "\\t"
+        };
+
+        // Internal: Converts `value` into a zero-padded string such that its
+        // length is at least equal to `width`. The `width` must be <= 6.
+        var leadingZeroes = "000000";
+        var toPaddedString = function (width, value) {
+          // The `|| 0` expression is necessary to work around a bug in
+          // Opera <= 7.54u2 where `0 == -0`, but `String(-0) !== "0"`.
+          return (leadingZeroes + (value || 0)).slice(-width);
+        };
+
+        // Internal: Double-quotes a string `value`, replacing all ASCII control
+        // characters (characters with code unit values between 0 and 31) with
+        // their escaped equivalents. This is an implementation of the
+        // `Quote(value)` operation defined in ES 5.1 section 15.12.3.
+        var unicodePrefix = "\\u00";
+        var quote = function (value) {
+          var result = '"', index = 0, length = value.length, useCharIndex = !charIndexBuggy || length > 10;
+          var symbols = useCharIndex && (charIndexBuggy ? value.split("") : value);
+          for (; index < length; index++) {
+            var charCode = value.charCodeAt(index);
+            // If the character is a control character, append its Unicode or
+            // shorthand escape sequence; otherwise, append the character as-is.
+            switch (charCode) {
+              case 8: case 9: case 10: case 12: case 13: case 34: case 92:
+                result += Escapes[charCode];
+                break;
+              default:
+                if (charCode < 32) {
+                  result += unicodePrefix + toPaddedString(2, charCode.toString(16));
+                  break;
+                }
+                result += useCharIndex ? symbols[index] : value.charAt(index);
+            }
+          }
+          return result + '"';
+        };
+
+        // Internal: Recursively serializes an object. Implements the
+        // `Str(key, holder)`, `JO(value)`, and `JA(value)` operations.
+        var serialize = function (property, object, callback, properties, whitespace, indentation, stack) {
+          var value, className, year, month, date, time, hours, minutes, seconds, milliseconds, results, element, index, length, prefix, result;
+          try {
+            // Necessary for host object support.
+            value = object[property];
+          } catch (exception) {}
+          if (typeof value == "object" && value) {
+            className = getClass.call(value);
+            if (className == dateClass && !isProperty.call(value, "toJSON")) {
+              if (value > -1 / 0 && value < 1 / 0) {
+                // Dates are serialized according to the `Date#toJSON` method
+                // specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15
+                // for the ISO 8601 date time string format.
+                if (getDay) {
+                  // Manually compute the year, month, date, hours, minutes,
+                  // seconds, and milliseconds if the `getUTC*` methods are
+                  // buggy. Adapted from @Yaffle's `date-shim` project.
+                  date = floor(value / 864e5);
+                  for (year = floor(date / 365.2425) + 1970 - 1; getDay(year + 1, 0) <= date; year++);
+                  for (month = floor((date - getDay(year, 0)) / 30.42); getDay(year, month + 1) <= date; month++);
+                  date = 1 + date - getDay(year, month);
+                  // The `time` value specifies the time within the day (see ES
+                  // 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used
+                  // to compute `A modulo B`, as the `%` operator does not
+                  // correspond to the `modulo` operation for negative numbers.
+                  time = (value % 864e5 + 864e5) % 864e5;
+                  // The hours, minutes, seconds, and milliseconds are obtained by
+                  // decomposing the time within the day. See section 15.9.1.10.
+                  hours = floor(time / 36e5) % 24;
+                  minutes = floor(time / 6e4) % 60;
+                  seconds = floor(time / 1e3) % 60;
+                  milliseconds = time % 1e3;
+                } else {
+                  year = value.getUTCFullYear();
+                  month = value.getUTCMonth();
+                  date = value.getUTCDate();
+                  hours = value.getUTCHours();
+                  minutes = value.getUTCMinutes();
+                  seconds = value.getUTCSeconds();
+                  milliseconds = value.getUTCMilliseconds();
+                }
+                // Serialize extended years correctly.
+                value = (year <= 0 || year >= 1e4 ? (year < 0 ? "-" : "+") + toPaddedString(6, year < 0 ? -year : year) : toPaddedString(4, year)) +
+                  "-" + toPaddedString(2, month + 1) + "-" + toPaddedString(2, date) +
+                  // Months, dates, hours, minutes, and seconds should have two
+                  // digits; milliseconds should have three.
+                  "T" + toPaddedString(2, hours) + ":" + toPaddedString(2, minutes) + ":" + toPaddedString(2, seconds) +
+                  // Milliseconds are optional in ES 5.0, but required in 5.1.
+                  "." + toPaddedString(3, milliseconds) + "Z";
+              } else {
+                value = null;
+              }
+            } else if (typeof value.toJSON == "function" && ((className != numberClass && className != stringClass && className != arrayClass) || isProperty.call(value, "toJSON"))) {
+              // Prototype <= 1.6.1 adds non-standard `toJSON` methods to the
+              // `Number`, `String`, `Date`, and `Array` prototypes. JSON 3
+              // ignores all `toJSON` methods on these objects unless they are
+              // defined directly on an instance.
+              value = value.toJSON(property);
+            }
+          }
+          if (callback) {
+            // If a replacement function was provided, call it to obtain the value
+            // for serialization.
+            value = callback.call(object, property, value);
+          }
+          if (value === null) {
+            return "null";
+          }
+          className = getClass.call(value);
+          if (className == booleanClass) {
+            // Booleans are represented literally.
+            return "" + value;
+          } else if (className == numberClass) {
+            // JSON numbers must be finite. `Infinity` and `NaN` are serialized as
+            // `"null"`.
+            return value > -1 / 0 && value < 1 / 0 ? "" + value : "null";
+          } else if (className == stringClass) {
+            // Strings are double-quoted and escaped.
+            return quote("" + value);
+          }
+          // Recursively serialize objects and arrays.
+          if (typeof value == "object") {
+            // Check for cyclic structures. This is a linear search; performance
+            // is inversely proportional to the number of unique nested objects.
+            for (length = stack.length; length--;) {
+              if (stack[length] === value) {
+                // Cyclic structures cannot be serialized by `JSON.stringify`.
+                throw TypeError();
+              }
+            }
+            // Add the object to the stack of traversed objects.
+            stack.push(value);
+            results = [];
+            // Save the current indentation level and indent one additional level.
+            prefix = indentation;
+            indentation += whitespace;
+            if (className == arrayClass) {
+              // Recursively serialize array elements.
+              for (index = 0, length = value.length; index < length; index++) {
+                element = serialize(index, value, callback, properties, whitespace, indentation, stack);
+                results.push(element === undef ? "null" : element);
+              }
+              result = results.length ? (whitespace ? "[\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "]" : ("[" + results.join(",") + "]")) : "[]";
+            } else {
+              // Recursively serialize object members. Members are selected from
+              // either a user-specified list of property names, or the object
+              // itself.
+              forEach(properties || value, function (property) {
+                var element = serialize(property, value, callback, properties, whitespace, indentation, stack);
+                if (element !== undef) {
+                  // According to ES 5.1 section 15.12.3: "If `gap` {whitespace}
+                  // is not the empty string, let `member` {quote(property) + ":"}
+                  // be the concatenation of `member` and the `space` character."
+                  // The "`space` character" refers to the literal space
+                  // character, not the `space` {width} argument provided to
+                  // `JSON.stringify`.
+                  results.push(quote(property) + ":" + (whitespace ? " " : "") + element);
+                }
+              });
+              result = results.length ? (whitespace ? "{\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "}" : ("{" + results.join(",") + "}")) : "{}";
+            }
+            // Remove the object from the traversed object stack.
+            stack.pop();
+            return result;
+          }
+        };
+
+        // Public: `JSON.stringify`. See ES 5.1 section 15.12.3.
+        exports.stringify = function (source, filter, width) {
+          var whitespace, callback, properties, className;
+          if (objectTypes[typeof filter] && filter) {
+            if ((className = getClass.call(filter)) == functionClass) {
+              callback = filter;
+            } else if (className == arrayClass) {
+              // Convert the property names array into a makeshift set.
+              properties = {};
+              for (var index = 0, length = filter.length, value; index < length; value = filter[index++], ((className = getClass.call(value)), className == stringClass || className == numberClass) && (properties[value] = 1));
+            }
+          }
+          if (width) {
+            if ((className = getClass.call(width)) == numberClass) {
+              // Convert the `width` to an integer and create a string containing
+              // `width` number of space characters.
+              if ((width -= width % 1) > 0) {
+                for (whitespace = "", width > 10 && (width = 10); whitespace.length < width; whitespace += " ");
+              }
+            } else if (className == stringClass) {
+              whitespace = width.length <= 10 ? width : width.slice(0, 10);
+            }
+          }
+          // Opera <= 7.54u2 discards the values associated with empty string keys
+          // (`""`) only if they are used directly within an object member list
+          // (e.g., `!("" in { "": 1})`).
+          return serialize("", (value = {}, value[""] = source, value), callback, properties, whitespace, "", []);
+        };
+      }
+
+      // Public: Parses a JSON source string.
+      if (!has("json-parse")) {
+        var fromCharCode = String.fromCharCode;
+
+        // Internal: A map of escaped control characters and their unescaped
+        // equivalents.
+        var Unescapes = {
+          92: "\\",
+          34: '"',
+          47: "/",
+          98: "\b",
+          116: "\t",
+          110: "\n",
+          102: "\f",
+          114: "\r"
+        };
+
+        // Internal: Stores the parser state.
+        var Index, Source;
+
+        // Internal: Resets the parser state and throws a `SyntaxError`.
+        var abort = function () {
+          Index = Source = null;
+          throw SyntaxError();
+        };
+
+        // Internal: Returns the next token, or `"$"` if the parser has reached
+        // the end of the source string. A token may be a string, number, `null`
+        // literal, or Boolean literal.
+        var lex = function () {
+          var source = Source, length = source.length, value, begin, position, isSigned, charCode;
+          while (Index < length) {
+            charCode = source.charCodeAt(Index);
+            switch (charCode) {
+              case 9: case 10: case 13: case 32:
+                // Skip whitespace tokens, including tabs, carriage returns, line
+                // feeds, and space characters.
+                Index++;
+                break;
+              case 123: case 125: case 91: case 93: case 58: case 44:
+                // Parse a punctuator token (`{`, `}`, `[`, `]`, `:`, or `,`) at
+                // the current position.
+                value = charIndexBuggy ? source.charAt(Index) : source[Index];
+                Index++;
+                return value;
+              case 34:
+                // `"` delimits a JSON string; advance to the next character and
+                // begin parsing the string. String tokens are prefixed with the
+                // sentinel `@` character to distinguish them from punctuators and
+                // end-of-string tokens.
+                for (value = "@", Index++; Index < length;) {
+                  charCode = source.charCodeAt(Index);
+                  if (charCode < 32) {
+                    // Unescaped ASCII control characters (those with a code unit
+                    // less than the space character) are not permitted.
+                    abort();
+                  } else if (charCode == 92) {
+                    // A reverse solidus (`\`) marks the beginning of an escaped
+                    // control character (including `"`, `\`, and `/`) or Unicode
+                    // escape sequence.
+                    charCode = source.charCodeAt(++Index);
+                    switch (charCode) {
+                      case 92: case 34: case 47: case 98: case 116: case 110: case 102: case 114:
+                        // Revive escaped control characters.
+                        value += Unescapes[charCode];
+                        Index++;
+                        break;
+                      case 117:
+                        // `\u` marks the beginning of a Unicode escape sequence.
+                        // Advance to the first character and validate the
+                        // four-digit code point.
+                        begin = ++Index;
+                        for (position = Index + 4; Index < position; Index++) {
+                          charCode = source.charCodeAt(Index);
+                          // A valid sequence comprises four hexdigits (case-
+                          // insensitive) that form a single hexadecimal value.
+                          if (!(charCode >= 48 && charCode <= 57 || charCode >= 97 && charCode <= 102 || charCode >= 65 && charCode <= 70)) {
+                            // Invalid Unicode escape sequence.
+                            abort();
+                          }
+                        }
+                        // Revive the escaped character.
+                        value += fromCharCode("0x" + source.slice(begin, Index));
+                        break;
+                      default:
+                        // Invalid escape sequence.
+                        abort();
+                    }
+                  } else {
+                    if (charCode == 34) {
+                      // An unescaped double-quote character marks the end of the
+                      // string.
+                      break;
+                    }
+                    charCode = source.charCodeAt(Index);
+                    begin = Index;
+                    // Optimize for the common case where a string is valid.
+                    while (charCode >= 32 && charCode != 92 && charCode != 34) {
+                      charCode = source.charCodeAt(++Index);
+                    }
+                    // Append the string as-is.
+                    value += source.slice(begin, Index);
+                  }
+                }
+                if (source.charCodeAt(Index) == 34) {
+                  // Advance to the next character and return the revived string.
+                  Index++;
+                  return value;
+                }
+                // Unterminated string.
+                abort();
+              default:
+                // Parse numbers and literals.
+                begin = Index;
+                // Advance past the negative sign, if one is specified.
+                if (charCode == 45) {
+                  isSigned = true;
+                  charCode = source.charCodeAt(++Index);
+                }
+                // Parse an integer or floating-point value.
+                if (charCode >= 48 && charCode <= 57) {
+                  // Leading zeroes are interpreted as octal literals.
+                  if (charCode == 48 && ((charCode = source.charCodeAt(Index + 1)), charCode >= 48 && charCode <= 57)) {
+                    // Illegal octal literal.
+                    abort();
+                  }
+                  isSigned = false;
+                  // Parse the integer component.
+                  for (; Index < length && ((charCode = source.charCodeAt(Index)), charCode >= 48 && charCode <= 57); Index++);
+                  // Floats cannot contain a leading decimal point; however, this
+                  // case is already accounted for by the parser.
+                  if (source.charCodeAt(Index) == 46) {
+                    position = ++Index;
+                    // Parse the decimal component.
+                    for (; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
+                    if (position == Index) {
+                      // Illegal trailing decimal.
+                      abort();
+                    }
+                    Index = position;
+                  }
+                  // Parse exponents. The `e` denoting the exponent is
+                  // case-insensitive.
+                  charCode = source.charCodeAt(Index);
+                  if (charCode == 101 || charCode == 69) {
+                    charCode = source.charCodeAt(++Index);
+                    // Skip past the sign following the exponent, if one is
+                    // specified.
+                    if (charCode == 43 || charCode == 45) {
+                      Index++;
+                    }
+                    // Parse the exponential component.
+                    for (position = Index; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
+                    if (position == Index) {
+                      // Illegal empty exponent.
+                      abort();
+                    }
+                    Index = position;
+                  }
+                  // Coerce the parsed value to a JavaScript number.
+                  return +source.slice(begin, Index);
+                }
+                // A negative sign may only precede numbers.
+                if (isSigned) {
+                  abort();
+                }
+                // `true`, `false`, and `null` literals.
+                if (source.slice(Index, Index + 4) == "true") {
+                  Index += 4;
+                  return true;
+                } else if (source.slice(Index, Index + 5) == "false") {
+                  Index += 5;
+                  return false;
+                } else if (source.slice(Index, Index + 4) == "null") {
+                  Index += 4;
+                  return null;
+                }
+                // Unrecognized token.
+                abort();
+            }
+          }
+          // Return the sentinel `$` character if the parser has reached the end
+          // of the source string.
+          return "$";
+        };
+
+        // Internal: Parses a JSON `value` token.
+        var get = function (value) {
+          var results, hasMembers;
+          if (value == "$") {
+            // Unexpected end of input.
+            abort();
+          }
+          if (typeof value == "string") {
+            if ((charIndexBuggy ? value.charAt(0) : value[0]) == "@") {
+              // Remove the sentinel `@` character.
+              return value.slice(1);
+            }
+            // Parse object and array literals.
+            if (value == "[") {
+              // Parses a JSON array, returning a new JavaScript array.
+              results = [];
+              for (;; hasMembers || (hasMembers = true)) {
+                value = lex();
+                // A closing square bracket marks the end of the array literal.
+                if (value == "]") {
+                  break;
+                }
+                // If the array literal contains elements, the current token
+                // should be a comma separating the previous element from the
+                // next.
+                if (hasMembers) {
+                  if (value == ",") {
+                    value = lex();
+                    if (value == "]") {
+                      // Unexpected trailing `,` in array literal.
+                      abort();
+                    }
+                  } else {
+                    // A `,` must separate each array element.
+                    abort();
+                  }
+                }
+                // Elisions and leading commas are not permitted.
+                if (value == ",") {
+                  abort();
+                }
+                results.push(get(value));
+              }
+              return results;
+            } else if (value == "{") {
+              // Parses a JSON object, returning a new JavaScript object.
+              results = {};
+              for (;; hasMembers || (hasMembers = true)) {
+                value = lex();
+                // A closing curly brace marks the end of the object literal.
+                if (value == "}") {
+                  break;
+                }
+                // If the object literal contains members, the current token
+                // should be a comma separator.
+                if (hasMembers) {
+                  if (value == ",") {
+                    value = lex();
+                    if (value == "}") {
+                      // Unexpected trailing `,` in object literal.
+                      abort();
+                    }
+                  } else {
+                    // A `,` must separate each object member.
+                    abort();
+                  }
+                }
+                // Leading commas are not permitted, object property names must be
+                // double-quoted strings, and a `:` must separate each property
+                // name and value.
+                if (value == "," || typeof value != "string" || (charIndexBuggy ? value.charAt(0) : value[0]) != "@" || lex() != ":") {
+                  abort();
+                }
+                results[value.slice(1)] = get(lex());
+              }
+              return results;
+            }
+            // Unexpected token encountered.
+            abort();
+          }
+          return value;
+        };
+
+        // Internal: Updates a traversed object member.
+        var update = function (source, property, callback) {
+          var element = walk(source, property, callback);
+          if (element === undef) {
+            delete source[property];
+          } else {
+            source[property] = element;
+          }
+        };
+
+        // Internal: Recursively traverses a parsed JSON object, invoking the
+        // `callback` function for each value. This is an implementation of the
+        // `Walk(holder, name)` operation defined in ES 5.1 section 15.12.2.
+        var walk = function (source, property, callback) {
+          var value = source[property], length;
+          if (typeof value == "object" && value) {
+            // `forEach` can't be used to traverse an array in Opera <= 8.54
+            // because its `Object#hasOwnProperty` implementation returns `false`
+            // for array indices (e.g., `![1, 2, 3].hasOwnProperty("0")`).
+            if (getClass.call(value) == arrayClass) {
+              for (length = value.length; length--;) {
+                update(value, length, callback);
+              }
+            } else {
+              forEach(value, function (property) {
+                update(value, property, callback);
+              });
+            }
+          }
+          return callback.call(source, property, value);
+        };
+
+        // Public: `JSON.parse`. See ES 5.1 section 15.12.2.
+        exports.parse = function (source, callback) {
+          var result, value;
+          Index = 0;
+          Source = "" + source;
+          result = get(lex());
+          // If a JSON string contains multiple tokens, it is invalid.
+          if (lex() != "$") {
+            abort();
+          }
+          // Reset the parser state.
+          Index = Source = null;
+          return callback && getClass.call(callback) == functionClass ? walk((value = {}, value[""] = result, value), "", callback) : result;
+        };
+      }
+    }
+
+    exports["runInContext"] = runInContext;
+    return exports;
+  }
+
+  if (freeExports && !isLoader) {
+    // Export for CommonJS environments.
+    runInContext(root, freeExports);
+  } else {
+    // Export for web browsers and JavaScript engines.
+    var nativeJSON = root.JSON,
+        previousJSON = root["JSON3"],
+        isRestored = false;
+
+    var JSON3 = runInContext(root, (root["JSON3"] = {
+      // Public: Restores the original value of the global `JSON` object and
+      // returns a reference to the `JSON3` object.
+      "noConflict": function () {
+        if (!isRestored) {
+          isRestored = true;
+          root.JSON = nativeJSON;
+          root["JSON3"] = previousJSON;
+          nativeJSON = previousJSON = null;
+        }
+        return JSON3;
+      }
+    }));
+
+    root.JSON = {
+      "parse": JSON3.parse,
+      "stringify": JSON3.stringify
+    };
+  }
+
+  // Export for asynchronous module loaders.
+  if (isLoader) {
+    define(function () {
+      return JSON3;
+    });
+  }
+}).call(this);
+
+}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
+},{}],51:[function(_dereq_,module,exports){
+module.exports = toArray
+
+function toArray(list, index) {
+    var array = []
+
+    index = index || 0
+
+    for (var i = index || 0; i < list.length; i++) {
+        array[i - index] = list[i]
+    }
+
+    return array
+}
+
+},{}]},{},[31])(31)
+});

From 0ee71e1ea82132fdc5a7c1bf9eaffeecdbf45bbc Mon Sep 17 00:00:00 2001
From: Muhammed Thanish <mnmtanish@gmail.com>
Date: Sat, 18 Jun 2016 14:41:29 +0530
Subject: [PATCH 2/2] Fix socket.io bug

---
 dist/client/_vendor/patched-socket.io.js      | 1790 +++++++++++++++++
 dist/client/preview/components/Preview.js     |   10 +-
 .../patched-socket.io.js                      |    9 +-
 src/client/preview/components/Preview.js      |   10 +-
 4 files changed, 1809 insertions(+), 10 deletions(-)
 create mode 100644 dist/client/_vendor/patched-socket.io.js
 rename src/client/{preview/components => _vendor}/patched-socket.io.js (99%)

diff --git a/dist/client/_vendor/patched-socket.io.js b/dist/client/_vendor/patched-socket.io.js
new file mode 100644
index 0000000..3937703
--- /dev/null
+++ b/dist/client/_vendor/patched-socket.io.js
@@ -0,0 +1,1790 @@
+"use strict";var _typeof=typeof Symbol==="function"&&typeof Symbol.iterator==="symbol"?function(obj){return typeof obj;}:function(obj){return obj&&typeof Symbol==="function"&&obj.constructor===Symbol?"symbol":typeof obj;};(function(f){if((typeof exports==="undefined"?"undefined":_typeof(exports))==="object"&&typeof module!=="undefined"){module.exports=f();}else if(typeof define==="function"&&define.amd){define([],f);}else {var g;if(typeof window!=="undefined"){g=window;}else if(typeof global!=="undefined"){g=global;}else if(typeof self!=="undefined"){g=self;}else {g=this;}g.io=f();}})(function(){var define,module,exports;return function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f;}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e);},l,l.exports,e,t,n,r);}return n[o].exports;}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++){s(r[o]);}return s;}({1:[function(_dereq_,module,exports){module.exports=_dereq_('./lib/');},{"./lib/":2}],2:[function(_dereq_,module,exports){module.exports=_dereq_('./socket'); /**
+ * Exports parser
+ *
+ * @api public
+ *
+ */module.exports.parser=_dereq_('engine.io-parser');},{"./socket":3,"engine.io-parser":19}],3:[function(_dereq_,module,exports){(function(global){ /**
+ * Module dependencies.
+ */var transports=_dereq_('./transports');var Emitter=_dereq_('component-emitter');var debug=_dereq_('debug')('engine.io-client:socket');var index=_dereq_('indexof');var parser=_dereq_('engine.io-parser');var parseuri=_dereq_('parseuri');var parsejson=_dereq_('parsejson');var parseqs=_dereq_('parseqs'); /**
+ * Module exports.
+ */module.exports=Socket; /**
+ * Noop function.
+ *
+ * @api private
+ */function noop(){} /**
+ * Socket constructor.
+ *
+ * @param {String|Object} uri or options
+ * @param {Object} options
+ * @api public
+ */function Socket(uri,opts){if(!(this instanceof Socket))return new Socket(uri,opts);opts=opts||{};if(uri&&'object'==(typeof uri==="undefined"?"undefined":_typeof(uri))){opts=uri;uri=null;}if(uri){uri=parseuri(uri);opts.hostname=uri.host;opts.secure=uri.protocol=='https'||uri.protocol=='wss';opts.port=uri.port;if(uri.query)opts.query=uri.query;}else if(opts.host){opts.hostname=parseuri(opts.host).host;}this.secure=null!=opts.secure?opts.secure:global.location&&'https:'==location.protocol;if(opts.hostname&&!opts.port){ // if no port is specified manually, use the protocol default
+opts.port=this.secure?'443':'80';}this.agent=opts.agent||false;this.hostname=opts.hostname||(global.location?location.hostname:'localhost');this.port=opts.port||(global.location&&location.port?location.port:this.secure?443:80);this.query=opts.query||{};if('string'==typeof this.query)this.query=parseqs.decode(this.query);this.upgrade=false!==opts.upgrade;this.path=(opts.path||'/engine.io').replace(/\/$/,'')+'/';this.forceJSONP=!!opts.forceJSONP;this.jsonp=false!==opts.jsonp;this.forceBase64=!!opts.forceBase64;this.enablesXDR=!!opts.enablesXDR;this.timestampParam=opts.timestampParam||'t';this.timestampRequests=opts.timestampRequests;this.transports=opts.transports||['polling','websocket'];this.readyState='';this.writeBuffer=[];this.policyPort=opts.policyPort||843;this.rememberUpgrade=opts.rememberUpgrade||false;this.binaryType=null;this.onlyBinaryUpgrades=opts.onlyBinaryUpgrades;this.perMessageDeflate=false!==opts.perMessageDeflate?opts.perMessageDeflate||{}:false;if(true===this.perMessageDeflate)this.perMessageDeflate={};if(this.perMessageDeflate&&null==this.perMessageDeflate.threshold){this.perMessageDeflate.threshold=1024;} // SSL options for Node.js client
+this.pfx=opts.pfx||null;this.key=opts.key||null;this.passphrase=opts.passphrase||null;this.cert=opts.cert||null;this.ca=opts.ca||null;this.ciphers=opts.ciphers||null;this.rejectUnauthorized=opts.rejectUnauthorized===undefined?null:opts.rejectUnauthorized; // other options for Node.js client
+var freeGlobal=(typeof global==="undefined"?"undefined":_typeof(global))=='object'&&global;if(freeGlobal.global===freeGlobal){if(opts.extraHeaders&&Object.keys(opts.extraHeaders).length>0){this.extraHeaders=opts.extraHeaders;}}this.open();}Socket.priorWebsocketSuccess=false; /**
+ * Mix in `Emitter`.
+ */Emitter(Socket.prototype); /**
+ * Protocol version.
+ *
+ * @api public
+ */Socket.protocol=parser.protocol; // this is an int
+/**
+ * Expose deps for legacy compatibility
+ * and standalone browser access.
+ */Socket.Socket=Socket;Socket.Transport=_dereq_('./transport');Socket.transports=_dereq_('./transports');Socket.parser=_dereq_('engine.io-parser'); /**
+ * Creates transport of the given type.
+ *
+ * @param {String} transport name
+ * @return {Transport}
+ * @api private
+ */Socket.prototype.createTransport=function(name){debug('creating transport "%s"',name);var query=clone(this.query); // append engine.io protocol identifier
+query.EIO=parser.protocol; // transport name
+query.transport=name; // session id if we already have one
+if(this.id)query.sid=this.id;var transport=new transports[name]({agent:this.agent,hostname:this.hostname,port:this.port,secure:this.secure,path:this.path,query:query,forceJSONP:this.forceJSONP,jsonp:this.jsonp,forceBase64:this.forceBase64,enablesXDR:this.enablesXDR,timestampRequests:this.timestampRequests,timestampParam:this.timestampParam,policyPort:this.policyPort,socket:this,pfx:this.pfx,key:this.key,passphrase:this.passphrase,cert:this.cert,ca:this.ca,ciphers:this.ciphers,rejectUnauthorized:this.rejectUnauthorized,perMessageDeflate:this.perMessageDeflate,extraHeaders:this.extraHeaders});return transport;};function clone(obj){var o={};for(var i in obj){if(obj.hasOwnProperty(i)){o[i]=obj[i];}}return o;} /**
+ * Initializes transport to use and starts probe.
+ *
+ * @api private
+ */Socket.prototype.open=function(){var transport;if(this.rememberUpgrade&&Socket.priorWebsocketSuccess&&this.transports.indexOf('websocket')!=-1){transport='websocket';}else if(0===this.transports.length){ // Emit error on next tick so it can be listened to
+var self=this;setTimeout(function(){self.emit('error','No transports available');},0);return;}else {transport=this.transports[0];}this.readyState='opening'; // Retry with the next transport if the transport is disabled (jsonp: false)
+try{transport=this.createTransport(transport);}catch(e){this.transports.shift();this.open();return;}transport.open();this.setTransport(transport);}; /**
+ * Sets the current transport. Disables the existing one (if any).
+ *
+ * @api private
+ */Socket.prototype.setTransport=function(transport){debug('setting transport %s',transport.name);var self=this;if(this.transport){debug('clearing existing transport %s',this.transport.name);this.transport.removeAllListeners();} // set up transport
+this.transport=transport; // set up transport listeners
+transport.on('drain',function(){self.onDrain();}).on('packet',function(packet){self.onPacket(packet);}).on('error',function(e){self.onError(e);}).on('close',function(){self.onClose('transport close');});}; /**
+ * Probes a transport.
+ *
+ * @param {String} transport name
+ * @api private
+ */Socket.prototype.probe=function(name){debug('probing transport "%s"',name);var transport=this.createTransport(name,{probe:1}),failed=false,self=this;Socket.priorWebsocketSuccess=false;function onTransportOpen(){if(self.onlyBinaryUpgrades){var upgradeLosesBinary=!this.supportsBinary&&self.transport.supportsBinary;failed=failed||upgradeLosesBinary;}if(failed)return;debug('probe transport "%s" opened',name);transport.send([{type:'ping',data:'probe'}]);transport.once('packet',function(msg){if(failed)return;if('pong'==msg.type&&'probe'==msg.data){debug('probe transport "%s" pong',name);self.upgrading=true;self.emit('upgrading',transport);if(!transport)return;Socket.priorWebsocketSuccess='websocket'==transport.name;debug('pausing current transport "%s"',self.transport.name);self.transport.pause(function(){if(failed)return;if('closed'==self.readyState)return;debug('changing transport and sending upgrade packet');cleanup();self.setTransport(transport);transport.send([{type:'upgrade'}]);self.emit('upgrade',transport);transport=null;self.upgrading=false;self.flush();});}else {debug('probe transport "%s" failed',name);var err=new Error('probe error');err.transport=transport.name;self.emit('upgradeError',err);}});}function freezeTransport(){if(failed)return; // Any callback called by transport should be ignored since now
+failed=true;cleanup();transport.close();transport=null;} //Handle any error that happens while probing
+function onerror(err){var error=new Error('probe error: '+err);error.transport=transport.name;freezeTransport();debug('probe transport "%s" failed because of error: %s',name,err);self.emit('upgradeError',error);}function onTransportClose(){onerror("transport closed");} //When the socket is closed while we're probing
+function onclose(){onerror("socket closed");} //When the socket is upgraded while we're probing
+function onupgrade(to){if(transport&&to.name!=transport.name){debug('"%s" works - aborting "%s"',to.name,transport.name);freezeTransport();}} //Remove all listeners on the transport and on self
+function cleanup(){transport.removeListener('open',onTransportOpen);transport.removeListener('error',onerror);transport.removeListener('close',onTransportClose);self.removeListener('close',onclose);self.removeListener('upgrading',onupgrade);}transport.once('open',onTransportOpen);transport.once('error',onerror);transport.once('close',onTransportClose);this.once('close',onclose);this.once('upgrading',onupgrade);transport.open();}; /**
+ * Called when connection is deemed open.
+ *
+ * @api public
+ */Socket.prototype.onOpen=function(){debug('socket open');this.readyState='open';Socket.priorWebsocketSuccess='websocket'==this.transport.name;this.emit('open');this.flush(); // we check for `readyState` in case an `open`
+// listener already closed the socket
+if('open'==this.readyState&&this.upgrade&&this.transport.pause){debug('starting upgrade probes');for(var i=0,l=this.upgrades.length;i<l;i++){this.probe(this.upgrades[i]);}}}; /**
+ * Handles a packet.
+ *
+ * @api private
+ */Socket.prototype.onPacket=function(packet){if('opening'==this.readyState||'open'==this.readyState){debug('socket receive: type "%s", data "%s"',packet.type,packet.data);this.emit('packet',packet); // Socket is live - any packet counts
+this.emit('heartbeat');switch(packet.type){case 'open':this.onHandshake(parsejson(packet.data));break;case 'pong':this.setPing();this.emit('pong');break;case 'error':var err=new Error('server error');err.code=packet.data;this.onError(err);break;case 'message':this.emit('data',packet.data);this.emit('message',packet.data);break;}}else {debug('packet received with socket readyState "%s"',this.readyState);}}; /**
+ * Called upon handshake completion.
+ *
+ * @param {Object} handshake obj
+ * @api private
+ */Socket.prototype.onHandshake=function(data){this.emit('handshake',data);this.id=data.sid;this.transport.query.sid=data.sid;this.upgrades=this.filterUpgrades(data.upgrades);this.pingInterval=data.pingInterval;this.pingTimeout=data.pingTimeout;this.onOpen(); // In case open handler closes socket
+if('closed'==this.readyState)return;this.setPing(); // Prolong liveness of socket on heartbeat
+this.removeListener('heartbeat',this.onHeartbeat);this.on('heartbeat',this.onHeartbeat);}; /**
+ * Resets ping timeout.
+ *
+ * @api private
+ */Socket.prototype.onHeartbeat=function(timeout){clearTimeout(this.pingTimeoutTimer);var self=this;self.pingTimeoutTimer=setTimeout(function(){if('closed'==self.readyState)return;self.onClose('ping timeout');},timeout||self.pingInterval+self.pingTimeout);}; /**
+ * Pings server every `this.pingInterval` and expects response
+ * within `this.pingTimeout` or closes connection.
+ *
+ * @api private
+ */Socket.prototype.setPing=function(){var self=this;clearTimeout(self.pingIntervalTimer);self.pingIntervalTimer=setTimeout(function(){debug('writing ping packet - expecting pong within %sms',self.pingTimeout);self.ping();self.onHeartbeat(self.pingTimeout);},self.pingInterval);}; /**
+* Sends a ping packet.
+*
+* @api private
+*/Socket.prototype.ping=function(){var self=this;this.sendPacket('ping',function(){self.emit('ping');});}; /**
+ * Called on `drain` event
+ *
+ * @api private
+ */Socket.prototype.onDrain=function(){this.writeBuffer.splice(0,this.prevBufferLen); // setting prevBufferLen = 0 is very important
+// for example, when upgrading, upgrade packet is sent over,
+// and a nonzero prevBufferLen could cause problems on `drain`
+this.prevBufferLen=0;if(0===this.writeBuffer.length){this.emit('drain');}else {this.flush();}}; /**
+ * Flush write buffers.
+ *
+ * @api private
+ */Socket.prototype.flush=function(){if('closed'!=this.readyState&&this.transport.writable&&!this.upgrading&&this.writeBuffer.length){debug('flushing %d packets in socket',this.writeBuffer.length);this.transport.send(this.writeBuffer); // keep track of current length of writeBuffer
+// splice writeBuffer and callbackBuffer on `drain`
+this.prevBufferLen=this.writeBuffer.length;this.emit('flush');}}; /**
+ * Sends a message.
+ *
+ * @param {String} message.
+ * @param {Function} callback function.
+ * @param {Object} options.
+ * @return {Socket} for chaining.
+ * @api public
+ */Socket.prototype.write=Socket.prototype.send=function(msg,options,fn){this.sendPacket('message',msg,options,fn);return this;}; /**
+ * Sends a packet.
+ *
+ * @param {String} packet type.
+ * @param {String} data.
+ * @param {Object} options.
+ * @param {Function} callback function.
+ * @api private
+ */Socket.prototype.sendPacket=function(type,data,options,fn){if('function'==typeof data){fn=data;data=undefined;}if('function'==typeof options){fn=options;options=null;}if('closing'==this.readyState||'closed'==this.readyState){return;}options=options||{};options.compress=false!==options.compress;var packet={type:type,data:data,options:options};this.emit('packetCreate',packet);this.writeBuffer.push(packet);if(fn)this.once('flush',fn);this.flush();}; /**
+ * Closes the connection.
+ *
+ * @api private
+ */Socket.prototype.close=function(){if('opening'==this.readyState||'open'==this.readyState){this.readyState='closing';var self=this;if(this.writeBuffer.length){this.once('drain',function(){if(this.upgrading){waitForUpgrade();}else {close();}});}else if(this.upgrading){waitForUpgrade();}else {close();}}function close(){self.onClose('forced close');debug('socket closing - telling transport to close');self.transport.close();}function cleanupAndClose(){self.removeListener('upgrade',cleanupAndClose);self.removeListener('upgradeError',cleanupAndClose);close();}function waitForUpgrade(){ // wait for upgrade to finish since we can't send packets while pausing a transport
+self.once('upgrade',cleanupAndClose);self.once('upgradeError',cleanupAndClose);}return this;}; /**
+ * Called upon transport error
+ *
+ * @api private
+ */Socket.prototype.onError=function(err){debug('socket error %j',err);Socket.priorWebsocketSuccess=false;this.emit('error',err);this.onClose('transport error',err);}; /**
+ * Called upon transport close.
+ *
+ * @api private
+ */Socket.prototype.onClose=function(reason,desc){if('opening'==this.readyState||'open'==this.readyState||'closing'==this.readyState){debug('socket close with reason: "%s"',reason);var self=this; // clear timers
+clearTimeout(this.pingIntervalTimer);clearTimeout(this.pingTimeoutTimer); // stop event from firing again for transport
+this.transport.removeAllListeners('close'); // ensure transport won't stay open
+this.transport.close(); // ignore further transport communication
+this.transport.removeAllListeners(); // set ready state
+this.readyState='closed'; // clear session id
+this.id=null; // emit close event
+this.emit('close',reason,desc); // clean buffers after, so users can still
+// grab the buffers on `close` event
+self.writeBuffer=[];self.prevBufferLen=0;}}; /**
+ * Filters upgrades, returning only those matching client transports.
+ *
+ * @param {Array} server upgrades
+ * @api private
+ *
+ */Socket.prototype.filterUpgrades=function(upgrades){var filteredUpgrades=[];for(var i=0,j=upgrades.length;i<j;i++){if(~index(this.transports,upgrades[i]))filteredUpgrades.push(upgrades[i]);}return filteredUpgrades;};}).call(this,typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:{});},{"./transport":4,"./transports":5,"component-emitter":15,"debug":17,"engine.io-parser":19,"indexof":23,"parsejson":26,"parseqs":27,"parseuri":28}],4:[function(_dereq_,module,exports){ /**
+ * Module dependencies.
+ */var parser=_dereq_('engine.io-parser');var Emitter=_dereq_('component-emitter'); /**
+ * Module exports.
+ */module.exports=Transport; /**
+ * Transport abstract constructor.
+ *
+ * @param {Object} options.
+ * @api private
+ */function Transport(opts){this.path=opts.path;this.hostname=opts.hostname;this.port=opts.port;this.secure=opts.secure;this.query=opts.query;this.timestampParam=opts.timestampParam;this.timestampRequests=opts.timestampRequests;this.readyState='';this.agent=opts.agent||false;this.socket=opts.socket;this.enablesXDR=opts.enablesXDR; // SSL options for Node.js client
+this.pfx=opts.pfx;this.key=opts.key;this.passphrase=opts.passphrase;this.cert=opts.cert;this.ca=opts.ca;this.ciphers=opts.ciphers;this.rejectUnauthorized=opts.rejectUnauthorized; // other options for Node.js client
+this.extraHeaders=opts.extraHeaders;} /**
+ * Mix in `Emitter`.
+ */Emitter(Transport.prototype); /**
+ * Emits an error.
+ *
+ * @param {String} str
+ * @return {Transport} for chaining
+ * @api public
+ */Transport.prototype.onError=function(msg,desc){var err=new Error(msg);err.type='TransportError';err.description=desc;this.emit('error',err);return this;}; /**
+ * Opens the transport.
+ *
+ * @api public
+ */Transport.prototype.open=function(){if('closed'==this.readyState||''==this.readyState){this.readyState='opening';this.doOpen();}return this;}; /**
+ * Closes the transport.
+ *
+ * @api private
+ */Transport.prototype.close=function(){if('opening'==this.readyState||'open'==this.readyState){this.doClose();this.onClose();}return this;}; /**
+ * Sends multiple packets.
+ *
+ * @param {Array} packets
+ * @api private
+ */Transport.prototype.send=function(packets){if('open'==this.readyState){this.write(packets);}else {throw new Error('Transport not open');}}; /**
+ * Called upon open
+ *
+ * @api private
+ */Transport.prototype.onOpen=function(){this.readyState='open';this.writable=true;this.emit('open');}; /**
+ * Called with data.
+ *
+ * @param {String} data
+ * @api private
+ */Transport.prototype.onData=function(data){var packet=parser.decodePacket(data,this.socket.binaryType);this.onPacket(packet);}; /**
+ * Called with a decoded packet.
+ */Transport.prototype.onPacket=function(packet){this.emit('packet',packet);}; /**
+ * Called upon close.
+ *
+ * @api private
+ */Transport.prototype.onClose=function(){this.readyState='closed';this.emit('close');};},{"component-emitter":15,"engine.io-parser":19}],5:[function(_dereq_,module,exports){(function(global){ /**
+ * Module dependencies
+ */var XMLHttpRequest=_dereq_('xmlhttprequest-ssl');var XHR=_dereq_('./polling-xhr');var JSONP=_dereq_('./polling-jsonp');var websocket=_dereq_('./websocket'); /**
+ * Export transports.
+ */exports.polling=polling;exports.websocket=websocket; /**
+ * Polling transport polymorphic constructor.
+ * Decides on xhr vs jsonp based on feature detection.
+ *
+ * @api private
+ */function polling(opts){var xhr;var xd=false;var xs=false;var jsonp=false!==opts.jsonp;if(global.location){var isSSL='https:'==location.protocol;var port=location.port; // some user agents have empty `location.port`
+if(!port){port=isSSL?443:80;}xd=opts.hostname!=location.hostname||port!=opts.port;xs=opts.secure!=isSSL;}opts.xdomain=xd;opts.xscheme=xs;xhr=new XMLHttpRequest(opts);if('open' in xhr&&!opts.forceJSONP){return new XHR(opts);}else {if(!jsonp)throw new Error('JSONP disabled');return new JSONP(opts);}}}).call(this,typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:{});},{"./polling-jsonp":6,"./polling-xhr":7,"./websocket":9,"xmlhttprequest-ssl":10}],6:[function(_dereq_,module,exports){(function(global){ /**
+ * Module requirements.
+ */var Polling=_dereq_('./polling');var inherit=_dereq_('component-inherit'); /**
+ * Module exports.
+ */module.exports=JSONPPolling; /**
+ * Cached regular expressions.
+ */var rNewline=/\n/g;var rEscapedNewline=/\\n/g; /**
+ * Global JSONP callbacks.
+ */var callbacks; /**
+ * Callbacks count.
+ */var index=0; /**
+ * Noop.
+ */function empty(){} /**
+ * JSONP Polling constructor.
+ *
+ * @param {Object} opts.
+ * @api public
+ */function JSONPPolling(opts){Polling.call(this,opts);this.query=this.query||{}; // define global callbacks array if not present
+// we do this here (lazily) to avoid unneeded global pollution
+if(!callbacks){ // we need to consider multiple engines in the same page
+if(!global.___eio)global.___eio=[];callbacks=global.___eio;} // callback identifier
+this.index=callbacks.length; // add callback to jsonp global
+var self=this;callbacks.push(function(msg){self.onData(msg);}); // append to query string
+this.query.j=this.index; // prevent spurious errors from being emitted when the window is unloaded
+if(global.document&&global.addEventListener){global.addEventListener('beforeunload',function(){if(self.script)self.script.onerror=empty;},false);}} /**
+ * Inherits from Polling.
+ */inherit(JSONPPolling,Polling); /*
+ * JSONP only supports binary as base64 encoded strings
+ */JSONPPolling.prototype.supportsBinary=false; /**
+ * Closes the socket.
+ *
+ * @api private
+ */JSONPPolling.prototype.doClose=function(){if(this.script){this.script.parentNode.removeChild(this.script);this.script=null;}if(this.form){this.form.parentNode.removeChild(this.form);this.form=null;this.iframe=null;}Polling.prototype.doClose.call(this);}; /**
+ * Starts a poll cycle.
+ *
+ * @api private
+ */JSONPPolling.prototype.doPoll=function(){var self=this;var script=document.createElement('script');if(this.script){this.script.parentNode.removeChild(this.script);this.script=null;}script.async=true;script.src=this.uri();script.onerror=function(e){self.onError('jsonp poll error',e);};var insertAt=document.getElementsByTagName('script')[0];if(insertAt){insertAt.parentNode.insertBefore(script,insertAt);}else {(document.head||document.body).appendChild(script);}this.script=script;var isUAgecko='undefined'!=typeof navigator&&'undefined'!=typeof navigator.userAgent&&/gecko/i.test(navigator.userAgent);if(isUAgecko){setTimeout(function(){var iframe=document.createElement('iframe');document.body.appendChild(iframe);document.body.removeChild(iframe);},100);}}; /**
+ * Writes with a hidden iframe.
+ *
+ * @param {String} data to send
+ * @param {Function} called upon flush.
+ * @api private
+ */JSONPPolling.prototype.doWrite=function(data,fn){var self=this;if(!this.form){var form=document.createElement('form');var area=document.createElement('textarea');var id=this.iframeId='eio_iframe_'+this.index;var iframe;form.className='socketio';form.style.position='absolute';form.style.top='-1000px';form.style.left='-1000px';form.target=id;form.method='POST';form.setAttribute('accept-charset','utf-8');area.name='d';form.appendChild(area);document.body.appendChild(form);this.form=form;this.area=area;}this.form.action=this.uri();function complete(){initIframe();fn();}function initIframe(){if(self.iframe){try{self.form.removeChild(self.iframe);}catch(e){self.onError('jsonp polling iframe removal error',e);}}try{ // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
+var html='<iframe src="javascript:0" name="'+self.iframeId+'">';iframe=document.createElement(html);}catch(e){iframe=document.createElement('iframe');iframe.name=self.iframeId;iframe.src='javascript:0';}iframe.id=self.iframeId;self.form.appendChild(iframe);self.iframe=iframe;}initIframe(); // escape \n to prevent it from being converted into \r\n by some UAs
+// double escaping is required for escaped new lines because unescaping of new lines can be done safely on server-side
+data=data.replace(rEscapedNewline,'\\\n');this.area.value=data.replace(rNewline,'\\n');try{this.form.submit();}catch(e){}if(this.iframe.attachEvent){this.iframe.onreadystatechange=function(){if(self.iframe.readyState=='complete'){complete();}};}else {this.iframe.onload=complete;}};}).call(this,typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:{});},{"./polling":8,"component-inherit":16}],7:[function(_dereq_,module,exports){(function(global){ /**
+ * Module requirements.
+ */var XMLHttpRequest=_dereq_('xmlhttprequest-ssl');var Polling=_dereq_('./polling');var Emitter=_dereq_('component-emitter');var inherit=_dereq_('component-inherit');var debug=_dereq_('debug')('engine.io-client:polling-xhr'); /**
+ * Module exports.
+ */module.exports=XHR;module.exports.Request=Request; /**
+ * Empty function
+ */function empty(){} /**
+ * XHR Polling constructor.
+ *
+ * @param {Object} opts
+ * @api public
+ */function XHR(opts){Polling.call(this,opts);if(global.location){var isSSL='https:'==location.protocol;var port=location.port; // some user agents have empty `location.port`
+if(!port){port=isSSL?443:80;}this.xd=opts.hostname!=global.location.hostname||port!=opts.port;this.xs=opts.secure!=isSSL;}else {this.extraHeaders=opts.extraHeaders;}} /**
+ * Inherits from Polling.
+ */inherit(XHR,Polling); /**
+ * XHR supports binary
+ */XHR.prototype.supportsBinary=true; /**
+ * Creates a request.
+ *
+ * @param {String} method
+ * @api private
+ */XHR.prototype.request=function(opts){opts=opts||{};opts.uri=this.uri();opts.xd=this.xd;opts.xs=this.xs;opts.agent=this.agent||false;opts.supportsBinary=this.supportsBinary;opts.enablesXDR=this.enablesXDR; // SSL options for Node.js client
+opts.pfx=this.pfx;opts.key=this.key;opts.passphrase=this.passphrase;opts.cert=this.cert;opts.ca=this.ca;opts.ciphers=this.ciphers;opts.rejectUnauthorized=this.rejectUnauthorized; // other options for Node.js client
+opts.extraHeaders=this.extraHeaders;return new Request(opts);}; /**
+ * Sends data.
+ *
+ * @param {String} data to send.
+ * @param {Function} called upon flush.
+ * @api private
+ */XHR.prototype.doWrite=function(data,fn){var isBinary=typeof data!=='string'&&data!==undefined;var req=this.request({method:'POST',data:data,isBinary:isBinary});var self=this;req.on('success',fn);req.on('error',function(err){self.onError('xhr post error',err);});this.sendXhr=req;}; /**
+ * Starts a poll cycle.
+ *
+ * @api private
+ */XHR.prototype.doPoll=function(){debug('xhr poll');var req=this.request();var self=this;req.on('data',function(data){self.onData(data);});req.on('error',function(err){self.onError('xhr poll error',err);});this.pollXhr=req;}; /**
+ * Request constructor
+ *
+ * @param {Object} options
+ * @api public
+ */function Request(opts){this.method=opts.method||'GET';this.uri=opts.uri;this.xd=!!opts.xd;this.xs=!!opts.xs;this.async=false!==opts.async;this.data=undefined!=opts.data?opts.data:null;this.agent=opts.agent;this.isBinary=opts.isBinary;this.supportsBinary=opts.supportsBinary;this.enablesXDR=opts.enablesXDR; // SSL options for Node.js client
+this.pfx=opts.pfx;this.key=opts.key;this.passphrase=opts.passphrase;this.cert=opts.cert;this.ca=opts.ca;this.ciphers=opts.ciphers;this.rejectUnauthorized=opts.rejectUnauthorized; // other options for Node.js client
+this.extraHeaders=opts.extraHeaders;this.create();} /**
+ * Mix in `Emitter`.
+ */Emitter(Request.prototype); /**
+ * Creates the XHR object and sends the request.
+ *
+ * @api private
+ */Request.prototype.create=function(){var opts={agent:this.agent,xdomain:this.xd,xscheme:this.xs,enablesXDR:this.enablesXDR}; // SSL options for Node.js client
+opts.pfx=this.pfx;opts.key=this.key;opts.passphrase=this.passphrase;opts.cert=this.cert;opts.ca=this.ca;opts.ciphers=this.ciphers;opts.rejectUnauthorized=this.rejectUnauthorized;var xhr=this.xhr=new XMLHttpRequest(opts);var self=this;try{debug('xhr open %s: %s',this.method,this.uri);xhr.open(this.method,this.uri,this.async);try{if(this.extraHeaders){xhr.setDisableHeaderCheck(true);for(var i in this.extraHeaders){if(this.extraHeaders.hasOwnProperty(i)){xhr.setRequestHeader(i,this.extraHeaders[i]);}}}}catch(e){}if(this.supportsBinary){ // This has to be done after open because Firefox is stupid
+// http://stackoverflow.com/questions/13216903/get-binary-data-with-xmlhttprequest-in-a-firefox-extension
+xhr.responseType='arraybuffer';}if('POST'==this.method){try{if(this.isBinary){xhr.setRequestHeader('Content-type','application/octet-stream');}else {xhr.setRequestHeader('Content-type','text/plain;charset=UTF-8');}}catch(e){}} // ie6 check
+if('withCredentials' in xhr){xhr.withCredentials=true;}if(this.hasXDR()){xhr.onload=function(){self.onLoad();};xhr.onerror=function(){self.onError(xhr.responseText);};}else {xhr.onreadystatechange=function(){if(4!=xhr.readyState)return;if(200==xhr.status||1223==xhr.status){self.onLoad();}else { // make sure the `error` event handler that's user-set
+// does not throw in the same tick and gets caught here
+setTimeout(function(){self.onError(xhr.status);},0);}};}debug('xhr data %s',this.data);xhr.send(this.data);}catch(e){ // Need to defer since .create() is called directly fhrom the constructor
+// and thus the 'error' event can only be only bound *after* this exception
+// occurs.  Therefore, also, we cannot throw here at all.
+setTimeout(function(){self.onError(e);},0);return;}if(global.document){this.index=Request.requestsCount++;Request.requests[this.index]=this;}}; /**
+ * Called upon successful response.
+ *
+ * @api private
+ */Request.prototype.onSuccess=function(){this.emit('success');this.cleanup();}; /**
+ * Called if we have data.
+ *
+ * @api private
+ */Request.prototype.onData=function(data){this.emit('data',data);this.onSuccess();}; /**
+ * Called upon error.
+ *
+ * @api private
+ */Request.prototype.onError=function(err){this.emit('error',err);this.cleanup(true);}; /**
+ * Cleans up house.
+ *
+ * @api private
+ */Request.prototype.cleanup=function(fromError){if('undefined'==typeof this.xhr||null===this.xhr){return;} // xmlhttprequest
+if(this.hasXDR()){this.xhr.onload=this.xhr.onerror=empty;}else {this.xhr.onreadystatechange=empty;}if(fromError){try{this.xhr.abort();}catch(e){}}if(global.document){delete Request.requests[this.index];}this.xhr=null;}; /**
+ * Called upon load.
+ *
+ * @api private
+ */Request.prototype.onLoad=function(){var data;try{var contentType;try{contentType=this.xhr.getResponseHeader('Content-Type').split(';')[0];}catch(e){}if(contentType==='application/octet-stream'){data=this.xhr.response;}else {if(!this.supportsBinary){data=this.xhr.responseText;}else {try{data=String.fromCharCode.apply(null,new Uint8Array(this.xhr.response));}catch(e){var ui8Arr=new Uint8Array(this.xhr.response);var dataArray=[];for(var idx=0,length=ui8Arr.length;idx<length;idx++){dataArray.push(ui8Arr[idx]);}data=String.fromCharCode.apply(null,dataArray);}}}}catch(e){this.onError(e);}if(null!=data){this.onData(data);}}; /**
+ * Check if it has XDomainRequest.
+ *
+ * @api private
+ */Request.prototype.hasXDR=function(){return 'undefined'!==typeof global.XDomainRequest&&!this.xs&&this.enablesXDR;}; /**
+ * Aborts the request.
+ *
+ * @api public
+ */Request.prototype.abort=function(){this.cleanup();}; /**
+ * Aborts pending requests when unloading the window. This is needed to prevent
+ * memory leaks (e.g. when using IE) and to ensure that no spurious error is
+ * emitted.
+ */if(global.document){Request.requestsCount=0;Request.requests={};if(global.attachEvent){global.attachEvent('onunload',unloadHandler);}else if(global.addEventListener){global.addEventListener('beforeunload',unloadHandler,false);}}function unloadHandler(){for(var i in Request.requests){if(Request.requests.hasOwnProperty(i)){Request.requests[i].abort();}}}}).call(this,typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:{});},{"./polling":8,"component-emitter":15,"component-inherit":16,"debug":17,"xmlhttprequest-ssl":10}],8:[function(_dereq_,module,exports){ /**
+ * Module dependencies.
+ */var Transport=_dereq_('../transport');var parseqs=_dereq_('parseqs');var parser=_dereq_('engine.io-parser');var inherit=_dereq_('component-inherit');var yeast=_dereq_('yeast');var debug=_dereq_('debug')('engine.io-client:polling'); /**
+ * Module exports.
+ */module.exports=Polling; /**
+ * Is XHR2 supported?
+ */var hasXHR2=function(){var XMLHttpRequest=_dereq_('xmlhttprequest-ssl');var xhr=new XMLHttpRequest({xdomain:false});return null!=xhr.responseType;}(); /**
+ * Polling interface.
+ *
+ * @param {Object} opts
+ * @api private
+ */function Polling(opts){var forceBase64=opts&&opts.forceBase64;if(!hasXHR2||forceBase64){this.supportsBinary=false;}Transport.call(this,opts);} /**
+ * Inherits from Transport.
+ */inherit(Polling,Transport); /**
+ * Transport name.
+ */Polling.prototype.name='polling'; /**
+ * Opens the socket (triggers polling). We write a PING message to determine
+ * when the transport is open.
+ *
+ * @api private
+ */Polling.prototype.doOpen=function(){this.poll();}; /**
+ * Pauses polling.
+ *
+ * @param {Function} callback upon buffers are flushed and transport is paused
+ * @api private
+ */Polling.prototype.pause=function(onPause){var pending=0;var self=this;this.readyState='pausing';function pause(){debug('paused');self.readyState='paused';onPause();}if(this.polling||!this.writable){var total=0;if(this.polling){debug('we are currently polling - waiting to pause');total++;this.once('pollComplete',function(){debug('pre-pause polling complete');--total||pause();});}if(!this.writable){debug('we are currently writing - waiting to pause');total++;this.once('drain',function(){debug('pre-pause writing complete');--total||pause();});}}else {pause();}}; /**
+ * Starts polling cycle.
+ *
+ * @api public
+ */Polling.prototype.poll=function(){debug('polling');this.polling=true;this.doPoll();this.emit('poll');}; /**
+ * Overloads onData to detect payloads.
+ *
+ * @api private
+ */Polling.prototype.onData=function(data){var self=this;debug('polling got data %s',data);var callback=function callback(packet,index,total){ // if its the first message we consider the transport open
+if('opening'==self.readyState){self.onOpen();} // if its a close packet, we close the ongoing requests
+if('close'==packet.type){self.onClose();return false;} // otherwise bypass onData and handle the message
+self.onPacket(packet);}; // decode payload
+parser.decodePayload(data,this.socket.binaryType,callback); // if an event did not trigger closing
+if('closed'!=this.readyState){ // if we got data we're not polling
+this.polling=false;this.emit('pollComplete');if('open'==this.readyState){this.poll();}else {debug('ignoring poll - transport state "%s"',this.readyState);}}}; /**
+ * For polling, send a close packet.
+ *
+ * @api private
+ */Polling.prototype.doClose=function(){var self=this;function close(){debug('writing close packet');self.write([{type:'close'}]);}if('open'==this.readyState){debug('transport open - closing');close();}else { // in case we're trying to close while
+// handshaking is in progress (GH-164)
+debug('transport not open - deferring close');this.once('open',close);}}; /**
+ * Writes a packets payload.
+ *
+ * @param {Array} data packets
+ * @param {Function} drain callback
+ * @api private
+ */Polling.prototype.write=function(packets){var self=this;this.writable=false;var callbackfn=function callbackfn(){self.writable=true;self.emit('drain');};var self=this;parser.encodePayload(packets,this.supportsBinary,function(data){self.doWrite(data,callbackfn);});}; /**
+ * Generates uri for connection.
+ *
+ * @api private
+ */Polling.prototype.uri=function(){var query=this.query||{};var schema=this.secure?'https':'http';var port=''; // cache busting is forced
+if(false!==this.timestampRequests){query[this.timestampParam]=yeast();}if(!this.supportsBinary&&!query.sid){query.b64=1;}query=parseqs.encode(query); // avoid port if default for schema
+if(this.port&&('https'==schema&&this.port!=443||'http'==schema&&this.port!=80)){port=':'+this.port;} // prepend ? to query
+if(query.length){query='?'+query;}var ipv6=this.hostname.indexOf(':')!==-1;return schema+'://'+(ipv6?'['+this.hostname+']':this.hostname)+port+this.path+query;};},{"../transport":4,"component-inherit":16,"debug":17,"engine.io-parser":19,"parseqs":27,"xmlhttprequest-ssl":10,"yeast":30}],9:[function(_dereq_,module,exports){(function(global){ /**
+ * Module dependencies.
+ */var Transport=_dereq_('../transport');var parser=_dereq_('engine.io-parser');var parseqs=_dereq_('parseqs');var inherit=_dereq_('component-inherit');var yeast=_dereq_('yeast');var debug=_dereq_('debug')('engine.io-client:websocket');var BrowserWebSocket=global.WebSocket||global.MozWebSocket; /**
+ * Get either the `WebSocket` or `MozWebSocket` globals
+ * in the browser or try to resolve WebSocket-compatible
+ * interface exposed by `ws` for Node-like environment.
+ */var WebSocket=BrowserWebSocket;if(!WebSocket&&typeof window==='undefined'){try{WebSocket=_dereq_('ws');}catch(e){}} /**
+ * Module exports.
+ */module.exports=WS; /**
+ * WebSocket transport constructor.
+ *
+ * @api {Object} connection options
+ * @api public
+ */function WS(opts){var forceBase64=opts&&opts.forceBase64;if(forceBase64){this.supportsBinary=false;}this.perMessageDeflate=opts.perMessageDeflate;Transport.call(this,opts);} /**
+ * Inherits from Transport.
+ */inherit(WS,Transport); /**
+ * Transport name.
+ *
+ * @api public
+ */WS.prototype.name='websocket'; /*
+ * WebSockets support binary
+ */WS.prototype.supportsBinary=true; /**
+ * Opens socket.
+ *
+ * @api private
+ */WS.prototype.doOpen=function(){if(!this.check()){ // let probe timeout
+return;}var self=this;var uri=this.uri();var protocols=void 0;var opts={agent:this.agent,perMessageDeflate:this.perMessageDeflate}; // SSL options for Node.js client
+opts.pfx=this.pfx;opts.key=this.key;opts.passphrase=this.passphrase;opts.cert=this.cert;opts.ca=this.ca;opts.ciphers=this.ciphers;opts.rejectUnauthorized=this.rejectUnauthorized;if(this.extraHeaders){opts.headers=this.extraHeaders;}this.ws=BrowserWebSocket?new WebSocket(uri):new WebSocket(uri,protocols,opts);if(this.ws.binaryType===undefined){this.supportsBinary=false;}if(this.ws.supports&&this.ws.supports.binary){this.supportsBinary=true;this.ws.binaryType='buffer';}else {this.ws.binaryType='arraybuffer';}this.addEventListeners();}; /**
+ * Adds event listeners to the socket
+ *
+ * @api private
+ */WS.prototype.addEventListeners=function(){var self=this;this.ws.onopen=function(){self.onOpen();};this.ws.onclose=function(){self.onClose();};this.ws.onmessage=function(ev){self.onData(ev.data);};this.ws.onerror=function(e){self.onError('websocket error',e);};}; /**
+ * Override `onData` to use a timer on iOS.
+ * See: https://gist.github.com/mloughran/2052006
+ *
+ * @api private
+ */if('undefined'!=typeof navigator&&'undefined'!=typeof navigator.userAgent&&/iPad|iPhone|iPod/i.test(navigator.userAgent)){WS.prototype.onData=function(data){var self=this;setTimeout(function(){Transport.prototype.onData.call(self,data);},0);};} /**
+ * Writes data to socket.
+ *
+ * @param {Array} array of packets.
+ * @api private
+ */WS.prototype.write=function(packets){var self=this;this.writable=false; // encodePacket efficient as it uses WS framing
+// no need for encodePayload
+var total=packets.length;for(var i=0,l=total;i<l;i++){(function(packet){parser.encodePacket(packet,self.supportsBinary,function(data){if(!BrowserWebSocket){ // always create a new object (GH-437)
+var opts={};if(packet.options){opts.compress=packet.options.compress;}if(self.perMessageDeflate){var len='string'==typeof data?global.Buffer.byteLength(data):data.length;if(len<self.perMessageDeflate.threshold){opts.compress=false;}}} //Sometimes the websocket has already been closed but the browser didn't
+//have a chance of informing us about it yet, in that case send will
+//throw an error
+try{if(BrowserWebSocket){ // TypeError is thrown when passing the second argument on Safari
+self.ws.send(data);}else {self.ws.send(data,opts);}}catch(e){debug('websocket closed before onclose event');}--total||done();});})(packets[i]);}function done(){self.emit('flush'); // fake drain
+// defer to next tick to allow Socket to clear writeBuffer
+setTimeout(function(){self.writable=true;self.emit('drain');},0);}}; /**
+ * Called upon close
+ *
+ * @api private
+ */WS.prototype.onClose=function(){Transport.prototype.onClose.call(this);}; /**
+ * Closes socket.
+ *
+ * @api private
+ */WS.prototype.doClose=function(){if(typeof this.ws!=='undefined'){this.ws.close();}}; /**
+ * Generates uri for connection.
+ *
+ * @api private
+ */WS.prototype.uri=function(){var query=this.query||{};var schema=this.secure?'wss':'ws';var port=''; // avoid port if default for schema
+if(this.port&&('wss'==schema&&this.port!=443||'ws'==schema&&this.port!=80)){port=':'+this.port;} // append timestamp to URI
+if(this.timestampRequests){query[this.timestampParam]=yeast();} // communicate binary support capabilities
+if(!this.supportsBinary){query.b64=1;}query=parseqs.encode(query); // prepend ? to query
+if(query.length){query='?'+query;}var ipv6=this.hostname.indexOf(':')!==-1;return schema+'://'+(ipv6?'['+this.hostname+']':this.hostname)+port+this.path+query;}; /**
+ * Feature detection for WebSocket.
+ *
+ * @return {Boolean} whether this transport is available.
+ * @api public
+ */WS.prototype.check=function(){return !!WebSocket&&!('__initialize' in WebSocket&&this.name===WS.prototype.name);};}).call(this,typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:{});},{"../transport":4,"component-inherit":16,"debug":17,"engine.io-parser":19,"parseqs":27,"ws":undefined,"yeast":30}],10:[function(_dereq_,module,exports){ // browser shim for xmlhttprequest module
+var hasCORS=_dereq_('has-cors');module.exports=function(opts){var xdomain=opts.xdomain; // scheme must be same when usign XDomainRequest
+// http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx
+var xscheme=opts.xscheme; // XDomainRequest has a flow of not sending cookie, therefore it should be disabled as a default.
+// https://github.com/Automattic/engine.io-client/pull/217
+var enablesXDR=opts.enablesXDR; // XMLHttpRequest can be disabled on IE
+try{if('undefined'!=typeof XMLHttpRequest&&(!xdomain||hasCORS)){return new XMLHttpRequest();}}catch(e){} // Use XDomainRequest for IE8 if enablesXDR is true
+// because loading bar keeps flashing when using jsonp-polling
+// https://github.com/yujiosaka/socke.io-ie8-loading-example
+try{if('undefined'!=typeof XDomainRequest&&!xscheme&&enablesXDR){return new XDomainRequest();}}catch(e){}if(!xdomain){try{return new ActiveXObject('Microsoft.XMLHTTP');}catch(e){}}};},{"has-cors":22}],11:[function(_dereq_,module,exports){module.exports=after;function after(count,callback,err_cb){var bail=false;err_cb=err_cb||noop;proxy.count=count;return count===0?callback():proxy;function proxy(err,result){if(proxy.count<=0){throw new Error('after called too many times');}--proxy.count; // after first error, rest are passed to err_cb
+if(err){bail=true;callback(err); // future error callbacks will go to error handler
+callback=err_cb;}else if(proxy.count===0&&!bail){callback(null,result);}}}function noop(){}},{}],12:[function(_dereq_,module,exports){ /**
+ * An abstraction for slicing an arraybuffer even when
+ * ArrayBuffer.prototype.slice is not supported
+ *
+ * @api public
+ */module.exports=function(arraybuffer,start,end){var bytes=arraybuffer.byteLength;start=start||0;end=end||bytes;if(arraybuffer.slice){return arraybuffer.slice(start,end);}if(start<0){start+=bytes;}if(end<0){end+=bytes;}if(end>bytes){end=bytes;}if(start>=bytes||start>=end||bytes===0){return new ArrayBuffer(0);}var abv=new Uint8Array(arraybuffer);var result=new Uint8Array(end-start);for(var i=start,ii=0;i<end;i++,ii++){result[ii]=abv[i];}return result.buffer;};},{}],13:[function(_dereq_,module,exports){ /*
+ * base64-arraybuffer
+ * https://github.com/niklasvh/base64-arraybuffer
+ *
+ * Copyright (c) 2012 Niklas von Hertzen
+ * Licensed under the MIT license.
+ */(function(chars){"use strict";exports.encode=function(arraybuffer){var bytes=new Uint8Array(arraybuffer),i,len=bytes.length,base64="";for(i=0;i<len;i+=3){base64+=chars[bytes[i]>>2];base64+=chars[(bytes[i]&3)<<4|bytes[i+1]>>4];base64+=chars[(bytes[i+1]&15)<<2|bytes[i+2]>>6];base64+=chars[bytes[i+2]&63];}if(len%3===2){base64=base64.substring(0,base64.length-1)+"=";}else if(len%3===1){base64=base64.substring(0,base64.length-2)+"==";}return base64;};exports.decode=function(base64){var bufferLength=base64.length*0.75,len=base64.length,i,p=0,encoded1,encoded2,encoded3,encoded4;if(base64[base64.length-1]==="="){bufferLength--;if(base64[base64.length-2]==="="){bufferLength--;}}var arraybuffer=new ArrayBuffer(bufferLength),bytes=new Uint8Array(arraybuffer);for(i=0;i<len;i+=4){encoded1=chars.indexOf(base64[i]);encoded2=chars.indexOf(base64[i+1]);encoded3=chars.indexOf(base64[i+2]);encoded4=chars.indexOf(base64[i+3]);bytes[p++]=encoded1<<2|encoded2>>4;bytes[p++]=(encoded2&15)<<4|encoded3>>2;bytes[p++]=(encoded3&3)<<6|encoded4&63;}return arraybuffer;};})("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");},{}],14:[function(_dereq_,module,exports){(function(global){ /**
+ * Create a blob builder even when vendor prefixes exist
+ */var BlobBuilder=global.BlobBuilder||global.WebKitBlobBuilder||global.MSBlobBuilder||global.MozBlobBuilder; /**
+ * Check if Blob constructor is supported
+ */var blobSupported=function(){try{var a=new Blob(['hi']);return a.size===2;}catch(e){return false;}}(); /**
+ * Check if Blob constructor supports ArrayBufferViews
+ * Fails in Safari 6, so we need to map to ArrayBuffers there.
+ */var blobSupportsArrayBufferView=blobSupported&&function(){try{var b=new Blob([new Uint8Array([1,2])]);return b.size===2;}catch(e){return false;}}(); /**
+ * Check if BlobBuilder is supported
+ */var blobBuilderSupported=BlobBuilder&&BlobBuilder.prototype.append&&BlobBuilder.prototype.getBlob; /**
+ * Helper function that maps ArrayBufferViews to ArrayBuffers
+ * Used by BlobBuilder constructor and old browsers that didn't
+ * support it in the Blob constructor.
+ */function mapArrayBufferViews(ary){for(var i=0;i<ary.length;i++){var chunk=ary[i];if(chunk.buffer instanceof ArrayBuffer){var buf=chunk.buffer; // if this is a subarray, make a copy so we only
+// include the subarray region from the underlying buffer
+if(chunk.byteLength!==buf.byteLength){var copy=new Uint8Array(chunk.byteLength);copy.set(new Uint8Array(buf,chunk.byteOffset,chunk.byteLength));buf=copy.buffer;}ary[i]=buf;}}}function BlobBuilderConstructor(ary,options){options=options||{};var bb=new BlobBuilder();mapArrayBufferViews(ary);for(var i=0;i<ary.length;i++){bb.append(ary[i]);}return options.type?bb.getBlob(options.type):bb.getBlob();};function BlobConstructor(ary,options){mapArrayBufferViews(ary);return new Blob(ary,options||{});};module.exports=function(){if(blobSupported){return blobSupportsArrayBufferView?global.Blob:BlobConstructor;}else if(blobBuilderSupported){return BlobBuilderConstructor;}else {return undefined;}}();}).call(this,typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:{});},{}],15:[function(_dereq_,module,exports){ /**
+ * Expose `Emitter`.
+ */module.exports=Emitter; /**
+ * Initialize a new `Emitter`.
+ *
+ * @api public
+ */function Emitter(obj){if(obj)return mixin(obj);}; /**
+ * Mixin the emitter properties.
+ *
+ * @param {Object} obj
+ * @return {Object}
+ * @api private
+ */function mixin(obj){for(var key in Emitter.prototype){obj[key]=Emitter.prototype[key];}return obj;} /**
+ * Listen on the given `event` with `fn`.
+ *
+ * @param {String} event
+ * @param {Function} fn
+ * @return {Emitter}
+ * @api public
+ */Emitter.prototype.on=Emitter.prototype.addEventListener=function(event,fn){this._callbacks=this._callbacks||{};(this._callbacks[event]=this._callbacks[event]||[]).push(fn);return this;}; /**
+ * Adds an `event` listener that will be invoked a single
+ * time then automatically removed.
+ *
+ * @param {String} event
+ * @param {Function} fn
+ * @return {Emitter}
+ * @api public
+ */Emitter.prototype.once=function(event,fn){var self=this;this._callbacks=this._callbacks||{};function on(){self.off(event,on);fn.apply(this,arguments);}on.fn=fn;this.on(event,on);return this;}; /**
+ * Remove the given callback for `event` or all
+ * registered callbacks.
+ *
+ * @param {String} event
+ * @param {Function} fn
+ * @return {Emitter}
+ * @api public
+ */Emitter.prototype.off=Emitter.prototype.removeListener=Emitter.prototype.removeAllListeners=Emitter.prototype.removeEventListener=function(event,fn){this._callbacks=this._callbacks||{}; // all
+if(0==arguments.length){this._callbacks={};return this;} // specific event
+var callbacks=this._callbacks[event];if(!callbacks)return this; // remove all handlers
+if(1==arguments.length){delete this._callbacks[event];return this;} // remove specific handler
+var cb;for(var i=0;i<callbacks.length;i++){cb=callbacks[i];if(cb===fn||cb.fn===fn){callbacks.splice(i,1);break;}}return this;}; /**
+ * Emit `event` with the given args.
+ *
+ * @param {String} event
+ * @param {Mixed} ...
+ * @return {Emitter}
+ */Emitter.prototype.emit=function(event){this._callbacks=this._callbacks||{};var args=[].slice.call(arguments,1),callbacks=this._callbacks[event];if(callbacks){callbacks=callbacks.slice(0);for(var i=0,len=callbacks.length;i<len;++i){callbacks[i].apply(this,args);}}return this;}; /**
+ * Return array of callbacks for `event`.
+ *
+ * @param {String} event
+ * @return {Array}
+ * @api public
+ */Emitter.prototype.listeners=function(event){this._callbacks=this._callbacks||{};return this._callbacks[event]||[];}; /**
+ * Check if this emitter has `event` handlers.
+ *
+ * @param {String} event
+ * @return {Boolean}
+ * @api public
+ */Emitter.prototype.hasListeners=function(event){return !!this.listeners(event).length;};},{}],16:[function(_dereq_,module,exports){module.exports=function(a,b){var fn=function fn(){};fn.prototype=b.prototype;a.prototype=new fn();a.prototype.constructor=a;};},{}],17:[function(_dereq_,module,exports){ /**
+ * This is the web browser implementation of `debug()`.
+ *
+ * Expose `debug()` as the module.
+ */exports=module.exports=_dereq_('./debug');exports.log=log;exports.formatArgs=formatArgs;exports.save=save;exports.load=load;exports.useColors=useColors;exports.storage='undefined'!=typeof chrome&&'undefined'!=typeof chrome.storage?chrome.storage.local:localstorage(); /**
+ * Colors.
+ */exports.colors=['lightseagreen','forestgreen','goldenrod','dodgerblue','darkorchid','crimson']; /**
+ * Currently only WebKit-based Web Inspectors, Firefox >= v31,
+ * and the Firebug extension (any Firefox version) are known
+ * to support "%c" CSS customizations.
+ *
+ * TODO: add a `localStorage` variable to explicitly enable/disable colors
+ */function useColors(){ // is webkit? http://stackoverflow.com/a/16459606/376773
+return 'WebkitAppearance' in document.documentElement.style|| // is firebug? http://stackoverflow.com/a/398120/376773
+window.console&&(console.firebug||console.exception&&console.table)|| // is firefox >= v31?
+// https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
+'undefined'!=typeof navigator&&'undefined'!=typeof navigator.userAgent&&navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/)&&parseInt(RegExp.$1,10)>=31;} /**
+ * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
+ */exports.formatters.j=function(v){return JSON.stringify(v);}; /**
+ * Colorize log arguments if enabled.
+ *
+ * @api public
+ */function formatArgs(){var args=arguments;var useColors=this.useColors;args[0]=(useColors?'%c':'')+this.namespace+(useColors?' %c':' ')+args[0]+(useColors?'%c ':' ')+'+'+exports.humanize(this.diff);if(!useColors)return args;var c='color: '+this.color;args=[args[0],c,'color: inherit'].concat(Array.prototype.slice.call(args,1)); // the final "%c" is somewhat tricky, because there could be other
+// arguments passed either before or after the %c, so we need to
+// figure out the correct index to insert the CSS into
+var index=0;var lastC=0;args[0].replace(/%[a-z%]/g,function(match){if('%%'===match)return;index++;if('%c'===match){ // we only are interested in the *last* %c
+// (the user may have provided their own)
+lastC=index;}});args.splice(lastC,0,c);return args;} /**
+ * Invokes `console.log()` when available.
+ * No-op when `console.log` is not a "function".
+ *
+ * @api public
+ */function log(){ // this hackery is required for IE8/9, where
+// the `console.log` function doesn't have 'apply'
+return 'object'===(typeof console==="undefined"?"undefined":_typeof(console))&&console.log&&Function.prototype.apply.call(console.log,console,arguments);} /**
+ * Save `namespaces`.
+ *
+ * @param {String} namespaces
+ * @api private
+ */function save(namespaces){try{if(null==namespaces){exports.storage.removeItem('debug');}else {exports.storage.debug=namespaces;}}catch(e){}} /**
+ * Load `namespaces`.
+ *
+ * @return {String} returns the previously persisted debug modes
+ * @api private
+ */function load(){var r;try{r=exports.storage.debug;}catch(e){}return r;} /**
+ * Enable namespaces listed in `localStorage.debug` initially.
+ */exports.enable(load()); /**
+ * Localstorage attempts to return the localstorage.
+ *
+ * This is necessary because safari throws
+ * when a user disables cookies/localstorage
+ * and you attempt to access it.
+ *
+ * @return {LocalStorage}
+ * @api private
+ */function localstorage(){try{return window.localStorage;}catch(e){}}},{"./debug":18}],18:[function(_dereq_,module,exports){ /**
+ * This is the common logic for both the Node.js and web browser
+ * implementations of `debug()`.
+ *
+ * Expose `debug()` as the module.
+ */exports=module.exports=debug;exports.coerce=coerce;exports.disable=disable;exports.enable=enable;exports.enabled=enabled;exports.humanize=_dereq_('ms'); /**
+ * The currently active debug mode names, and names to skip.
+ */exports.names=[];exports.skips=[]; /**
+ * Map of special "%n" handling functions, for the debug "format" argument.
+ *
+ * Valid key names are a single, lowercased letter, i.e. "n".
+ */exports.formatters={}; /**
+ * Previously assigned color.
+ */var prevColor=0; /**
+ * Previous log timestamp.
+ */var prevTime; /**
+ * Select a color.
+ *
+ * @return {Number}
+ * @api private
+ */function selectColor(){return exports.colors[prevColor++%exports.colors.length];} /**
+ * Create a debugger with the given `namespace`.
+ *
+ * @param {String} namespace
+ * @return {Function}
+ * @api public
+ */function debug(namespace){ // define the `disabled` version
+function disabled(){}disabled.enabled=false; // define the `enabled` version
+function enabled(){var self=enabled; // set `diff` timestamp
+var curr=+new Date();var ms=curr-(prevTime||curr);self.diff=ms;self.prev=prevTime;self.curr=curr;prevTime=curr; // add the `color` if not set
+if(null==self.useColors)self.useColors=exports.useColors();if(null==self.color&&self.useColors)self.color=selectColor();var args=Array.prototype.slice.call(arguments);args[0]=exports.coerce(args[0]);if('string'!==typeof args[0]){ // anything else let's inspect with %o
+args=['%o'].concat(args);} // apply any `formatters` transformations
+var index=0;args[0]=args[0].replace(/%([a-z%])/g,function(match,format){ // if we encounter an escaped % then don't increase the array index
+if(match==='%%')return match;index++;var formatter=exports.formatters[format];if('function'===typeof formatter){var val=args[index];match=formatter.call(self,val); // now we need to remove `args[index]` since it's inlined in the `format`
+args.splice(index,1);index--;}return match;});if('function'===typeof exports.formatArgs){args=exports.formatArgs.apply(self,args);}var logFn=enabled.log||exports.log||console.log.bind(console);logFn.apply(self,args);}enabled.enabled=true;var fn=exports.enabled(namespace)?enabled:disabled;fn.namespace=namespace;return fn;} /**
+ * Enables a debug mode by namespaces. This can include modes
+ * separated by a colon and wildcards.
+ *
+ * @param {String} namespaces
+ * @api public
+ */function enable(namespaces){exports.save(namespaces);var split=(namespaces||'').split(/[\s,]+/);var len=split.length;for(var i=0;i<len;i++){if(!split[i])continue; // ignore empty strings
+namespaces=split[i].replace(/\*/g,'.*?');if(namespaces[0]==='-'){exports.skips.push(new RegExp('^'+namespaces.substr(1)+'$'));}else {exports.names.push(new RegExp('^'+namespaces+'$'));}}} /**
+ * Disable debug output.
+ *
+ * @api public
+ */function disable(){exports.enable('');} /**
+ * Returns true if the given mode name is enabled, false otherwise.
+ *
+ * @param {String} name
+ * @return {Boolean}
+ * @api public
+ */function enabled(name){var i,len;for(i=0,len=exports.skips.length;i<len;i++){if(exports.skips[i].test(name)){return false;}}for(i=0,len=exports.names.length;i<len;i++){if(exports.names[i].test(name)){return true;}}return false;} /**
+ * Coerce `val`.
+ *
+ * @param {Mixed} val
+ * @return {Mixed}
+ * @api private
+ */function coerce(val){if(val instanceof Error)return val.stack||val.message;return val;}},{"ms":25}],19:[function(_dereq_,module,exports){(function(global){ /**
+ * Module dependencies.
+ */var keys=_dereq_('./keys');var hasBinary=_dereq_('has-binary');var sliceBuffer=_dereq_('arraybuffer.slice');var base64encoder=_dereq_('base64-arraybuffer');var after=_dereq_('after');var utf8=_dereq_('utf8'); /**
+ * Check if we are running an android browser. That requires us to use
+ * ArrayBuffer with polling transports...
+ *
+ * http://ghinda.net/jpeg-blob-ajax-android/
+ */var isAndroid='undefined'!=typeof navigator&&'undefined'!=typeof navigator.userAgent&&navigator.userAgent.match(/Android/i); /**
+ * Check if we are running in PhantomJS.
+ * Uploading a Blob with PhantomJS does not work correctly, as reported here:
+ * https://github.com/ariya/phantomjs/issues/11395
+ * @type boolean
+ */var isPhantomJS='undefined'!=typeof navigator&&'undefined'!=typeof navigator.userAgent&&/PhantomJS/i.test(navigator.userAgent); /**
+ * When true, avoids using Blobs to encode payloads.
+ * @type boolean
+ */var dontSendBlobs=isAndroid||isPhantomJS; /**
+ * Current protocol version.
+ */exports.protocol=3; /**
+ * Packet types.
+ */var packets=exports.packets={open:0 // non-ws
+,close:1 // non-ws
+,ping:2,pong:3,message:4,upgrade:5,noop:6};var packetslist=keys(packets); /**
+ * Premade error packet.
+ */var err={type:'error',data:'parser error'}; /**
+ * Create a blob api even for blob builder when vendor prefixes exist
+ */var Blob=_dereq_('blob'); /**
+ * Encodes a packet.
+ *
+ *     <packet type id> [ <data> ]
+ *
+ * Example:
+ *
+ *     5hello world
+ *     3
+ *     4
+ *
+ * Binary is encoded in an identical principle
+ *
+ * @api private
+ */exports.encodePacket=function(packet,supportsBinary,utf8encode,callback){if('function'==typeof supportsBinary){callback=supportsBinary;supportsBinary=false;}if('function'==typeof utf8encode){callback=utf8encode;utf8encode=null;}var data=packet.data===undefined?undefined:packet.data.buffer||packet.data;if(global.ArrayBuffer&&data instanceof ArrayBuffer){return encodeArrayBuffer(packet,supportsBinary,callback);}else if(Blob&&data instanceof global.Blob){return encodeBlob(packet,supportsBinary,callback);} // might be an object with { base64: true, data: dataAsBase64String }
+if(data&&data.base64){return encodeBase64Object(packet,callback);} // Sending data as a utf-8 string
+var encoded=packets[packet.type]; // data fragment is optional
+if(undefined!==packet.data){encoded+=utf8encode?utf8.encode(String(packet.data)):String(packet.data);}return callback(''+encoded);};function encodeBase64Object(packet,callback){ // packet data is an object { base64: true, data: dataAsBase64String }
+var message='b'+exports.packets[packet.type]+packet.data.data;return callback(message);} /**
+ * Encode packet helpers for binary types
+ */function encodeArrayBuffer(packet,supportsBinary,callback){if(!supportsBinary){return exports.encodeBase64Packet(packet,callback);}var data=packet.data;var contentArray=new Uint8Array(data);var resultBuffer=new Uint8Array(1+data.byteLength);resultBuffer[0]=packets[packet.type];for(var i=0;i<contentArray.length;i++){resultBuffer[i+1]=contentArray[i];}return callback(resultBuffer.buffer);}function encodeBlobAsArrayBuffer(packet,supportsBinary,callback){if(!supportsBinary){return exports.encodeBase64Packet(packet,callback);}var fr=new FileReader();fr.onload=function(){packet.data=fr.result;exports.encodePacket(packet,supportsBinary,true,callback);};return fr.readAsArrayBuffer(packet.data);}function encodeBlob(packet,supportsBinary,callback){if(!supportsBinary){return exports.encodeBase64Packet(packet,callback);}if(dontSendBlobs){return encodeBlobAsArrayBuffer(packet,supportsBinary,callback);}var length=new Uint8Array(1);length[0]=packets[packet.type];var blob=new Blob([length.buffer,packet.data]);return callback(blob);} /**
+ * Encodes a packet with binary data in a base64 string
+ *
+ * @param {Object} packet, has `type` and `data`
+ * @return {String} base64 encoded message
+ */exports.encodeBase64Packet=function(packet,callback){var message='b'+exports.packets[packet.type];if(Blob&&packet.data instanceof global.Blob){var fr=new FileReader();fr.onload=function(){var b64=fr.result.split(',')[1];callback(message+b64);};return fr.readAsDataURL(packet.data);}var b64data;try{b64data=String.fromCharCode.apply(null,new Uint8Array(packet.data));}catch(e){ // iPhone Safari doesn't let you apply with typed arrays
+var typed=new Uint8Array(packet.data);var basic=new Array(typed.length);for(var i=0;i<typed.length;i++){basic[i]=typed[i];}b64data=String.fromCharCode.apply(null,basic);}message+=global.btoa(b64data);return callback(message);}; /**
+ * Decodes a packet. Changes format to Blob if requested.
+ *
+ * @return {Object} with `type` and `data` (if any)
+ * @api private
+ */exports.decodePacket=function(data,binaryType,utf8decode){ // String data
+if(typeof data=='string'||data===undefined){if(data.charAt(0)=='b'){return exports.decodeBase64Packet(data.substr(1),binaryType);}if(utf8decode){try{data=utf8.decode(data);}catch(e){return err;}}var type=data.charAt(0);if(Number(type)!=type||!packetslist[type]){return err;}if(data.length>1){return {type:packetslist[type],data:data.substring(1)};}else {return {type:packetslist[type]};}}var asArray=new Uint8Array(data);var type=asArray[0];var rest=sliceBuffer(data,1);if(Blob&&binaryType==='blob'){rest=new Blob([rest]);}return {type:packetslist[type],data:rest};}; /**
+ * Decodes a packet encoded in a base64 string
+ *
+ * @param {String} base64 encoded message
+ * @return {Object} with `type` and `data` (if any)
+ */exports.decodeBase64Packet=function(msg,binaryType){var type=packetslist[msg.charAt(0)];if(!global.ArrayBuffer){return {type:type,data:{base64:true,data:msg.substr(1)}};}var data=base64encoder.decode(msg.substr(1));if(binaryType==='blob'&&Blob){data=new Blob([data]);}return {type:type,data:data};}; /**
+ * Encodes multiple messages (payload).
+ *
+ *     <length>:data
+ *
+ * Example:
+ *
+ *     11:hello world2:hi
+ *
+ * If any contents are binary, they will be encoded as base64 strings. Base64
+ * encoded strings are marked with a b before the length specifier
+ *
+ * @param {Array} packets
+ * @api private
+ */exports.encodePayload=function(packets,supportsBinary,callback){if(typeof supportsBinary=='function'){callback=supportsBinary;supportsBinary=null;}var isBinary=hasBinary(packets);if(supportsBinary&&isBinary){if(Blob&&!dontSendBlobs){return exports.encodePayloadAsBlob(packets,callback);}return exports.encodePayloadAsArrayBuffer(packets,callback);}if(!packets.length){return callback('0:');}function setLengthHeader(message){return message.length+':'+message;}function encodeOne(packet,doneCallback){exports.encodePacket(packet,!isBinary?false:supportsBinary,true,function(message){doneCallback(null,setLengthHeader(message));});}map(packets,encodeOne,function(err,results){return callback(results.join(''));});}; /**
+ * Async array map using after
+ */function map(ary,each,done){var result=new Array(ary.length);var next=after(ary.length,done);var eachWithIndex=function eachWithIndex(i,el,cb){each(el,function(error,msg){result[i]=msg;cb(error,result);});};for(var i=0;i<ary.length;i++){eachWithIndex(i,ary[i],next);}} /*
+ * Decodes data when a payload is maybe expected. Possible binary contents are
+ * decoded from their base64 representation
+ *
+ * @param {String} data, callback method
+ * @api public
+ */exports.decodePayload=function(data,binaryType,callback){if(typeof data!='string'){return exports.decodePayloadAsBinary(data,binaryType,callback);}if(typeof binaryType==='function'){callback=binaryType;binaryType=null;}var packet;if(data==''){ // parser error - ignoring payload
+return callback(err,0,1);}var length='',n,msg;for(var i=0,l=data.length;i<l;i++){var chr=data.charAt(i);if(':'!=chr){length+=chr;}else {if(''==length||length!=(n=Number(length))){ // parser error - ignoring payload
+return callback(err,0,1);}msg=data.substr(i+1,n);if(length!=msg.length){ // parser error - ignoring payload
+return callback(err,0,1);}if(msg.length){packet=exports.decodePacket(msg,binaryType,true);if(err.type==packet.type&&err.data==packet.data){ // parser error in individual packet - ignoring payload
+return callback(err,0,1);}var ret=callback(packet,i+n,l);if(false===ret)return;} // advance cursor
+i+=n;length='';}}if(length!=''){ // parser error - ignoring payload
+return callback(err,0,1);}}; /**
+ * Encodes multiple messages (payload) as binary.
+ *
+ * <1 = binary, 0 = string><number from 0-9><number from 0-9>[...]<number
+ * 255><data>
+ *
+ * Example:
+ * 1 3 255 1 2 3, if the binary contents are interpreted as 8 bit integers
+ *
+ * @param {Array} packets
+ * @return {ArrayBuffer} encoded payload
+ * @api private
+ */exports.encodePayloadAsArrayBuffer=function(packets,callback){if(!packets.length){return callback(new ArrayBuffer(0));}function encodeOne(packet,doneCallback){exports.encodePacket(packet,true,true,function(data){return doneCallback(null,data);});}map(packets,encodeOne,function(err,encodedPackets){var totalLength=encodedPackets.reduce(function(acc,p){var len;if(typeof p==='string'){len=p.length;}else {len=p.byteLength;}return acc+len.toString().length+len+2; // string/binary identifier + separator = 2
+},0);var resultArray=new Uint8Array(totalLength);var bufferIndex=0;encodedPackets.forEach(function(p){var isString=typeof p==='string';var ab=p;if(isString){var view=new Uint8Array(p.length);for(var i=0;i<p.length;i++){view[i]=p.charCodeAt(i);}ab=view.buffer;}if(isString){ // not true binary
+resultArray[bufferIndex++]=0;}else { // true binary
+resultArray[bufferIndex++]=1;}var lenStr=ab.byteLength.toString();for(var i=0;i<lenStr.length;i++){resultArray[bufferIndex++]=parseInt(lenStr[i]);}resultArray[bufferIndex++]=255;var view=new Uint8Array(ab);for(var i=0;i<view.length;i++){resultArray[bufferIndex++]=view[i];}});return callback(resultArray.buffer);});}; /**
+ * Encode as Blob
+ */exports.encodePayloadAsBlob=function(packets,callback){function encodeOne(packet,doneCallback){exports.encodePacket(packet,true,true,function(encoded){var binaryIdentifier=new Uint8Array(1);binaryIdentifier[0]=1;if(typeof encoded==='string'){var view=new Uint8Array(encoded.length);for(var i=0;i<encoded.length;i++){view[i]=encoded.charCodeAt(i);}encoded=view.buffer;binaryIdentifier[0]=0;}var len=encoded instanceof ArrayBuffer?encoded.byteLength:encoded.size;var lenStr=len.toString();var lengthAry=new Uint8Array(lenStr.length+1);for(var i=0;i<lenStr.length;i++){lengthAry[i]=parseInt(lenStr[i]);}lengthAry[lenStr.length]=255;if(Blob){var blob=new Blob([binaryIdentifier.buffer,lengthAry.buffer,encoded]);doneCallback(null,blob);}});}map(packets,encodeOne,function(err,results){return callback(new Blob(results));});}; /*
+ * Decodes data when a payload is maybe expected. Strings are decoded by
+ * interpreting each byte as a key code for entries marked to start with 0. See
+ * description of encodePayloadAsBinary
+ *
+ * @param {ArrayBuffer} data, callback method
+ * @api public
+ */exports.decodePayloadAsBinary=function(data,binaryType,callback){if(typeof binaryType==='function'){callback=binaryType;binaryType=null;}var bufferTail=data;var buffers=[];var numberTooLong=false;while(bufferTail.byteLength>0){var tailArray=new Uint8Array(bufferTail);var isString=tailArray[0]===0;var msgLength='';for(var i=1;;i++){if(tailArray[i]==255)break;if(msgLength.length>310){numberTooLong=true;break;}msgLength+=tailArray[i];}if(numberTooLong)return callback(err,0,1);bufferTail=sliceBuffer(bufferTail,2+msgLength.length);msgLength=parseInt(msgLength);var msg=sliceBuffer(bufferTail,0,msgLength);if(isString){try{msg=String.fromCharCode.apply(null,new Uint8Array(msg));}catch(e){ // iPhone Safari doesn't let you apply to typed arrays
+var typed=new Uint8Array(msg);msg='';for(var i=0;i<typed.length;i++){msg+=String.fromCharCode(typed[i]);}}}buffers.push(msg);bufferTail=sliceBuffer(bufferTail,msgLength);}var total=buffers.length;buffers.forEach(function(buffer,i){callback(exports.decodePacket(buffer,binaryType,true),i,total);});};}).call(this,typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:{});},{"./keys":20,"after":11,"arraybuffer.slice":12,"base64-arraybuffer":13,"blob":14,"has-binary":21,"utf8":29}],20:[function(_dereq_,module,exports){ /**
+ * Gets the keys for an object.
+ *
+ * @return {Array} keys
+ * @api private
+ */module.exports=Object.keys||function keys(obj){var arr=[];var has=Object.prototype.hasOwnProperty;for(var i in obj){if(has.call(obj,i)){arr.push(i);}}return arr;};},{}],21:[function(_dereq_,module,exports){(function(global){ /*
+ * Module requirements.
+ */var isArray=_dereq_('isarray'); /**
+ * Module exports.
+ */module.exports=hasBinary; /**
+ * Checks for binary data.
+ *
+ * Right now only Buffer and ArrayBuffer are supported..
+ *
+ * @param {Object} anything
+ * @api public
+ */function hasBinary(data){function _hasBinary(obj){if(!obj)return false;if(global.Buffer&&global.Buffer.isBuffer(obj)||global.ArrayBuffer&&obj instanceof ArrayBuffer||global.Blob&&obj instanceof Blob||global.File&&obj instanceof File){return true;}if(isArray(obj)){for(var i=0;i<obj.length;i++){if(_hasBinary(obj[i])){return true;}}}else if(obj&&'object'==(typeof obj==="undefined"?"undefined":_typeof(obj))){if(obj.toJSON){obj=obj.toJSON();}for(var key in obj){if(Object.prototype.hasOwnProperty.call(obj,key)&&_hasBinary(obj[key])){return true;}}}return false;}return _hasBinary(data);}}).call(this,typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:{});},{"isarray":24}],22:[function(_dereq_,module,exports){ /**
+ * Module exports.
+ *
+ * Logic borrowed from Modernizr:
+ *
+ *   - https://github.com/Modernizr/Modernizr/blob/master/feature-detects/cors.js
+ */try{module.exports=typeof XMLHttpRequest!=='undefined'&&'withCredentials' in new XMLHttpRequest();}catch(err){ // if XMLHttp support is disabled in IE then it will throw
+// when trying to create
+module.exports=false;}},{}],23:[function(_dereq_,module,exports){var indexOf=[].indexOf;module.exports=function(arr,obj){if(indexOf)return arr.indexOf(obj);for(var i=0;i<arr.length;++i){if(arr[i]===obj)return i;}return -1;};},{}],24:[function(_dereq_,module,exports){module.exports=Array.isArray||function(arr){return Object.prototype.toString.call(arr)=='[object Array]';};},{}],25:[function(_dereq_,module,exports){ /**
+ * Helpers.
+ */var s=1000;var m=s*60;var h=m*60;var d=h*24;var y=d*365.25; /**
+ * Parse or format the given `val`.
+ *
+ * Options:
+ *
+ *  - `long` verbose formatting [false]
+ *
+ * @param {String|Number} val
+ * @param {Object} options
+ * @return {String|Number}
+ * @api public
+ */module.exports=function(val,options){options=options||{};if('string'==typeof val)return parse(val);return options.long?long(val):short(val);}; /**
+ * Parse the given `str` and return milliseconds.
+ *
+ * @param {String} str
+ * @return {Number}
+ * @api private
+ */function parse(str){str=''+str;if(str.length>10000)return;var match=/^((?:\d+)?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|years?|yrs?|y)?$/i.exec(str);if(!match)return;var n=parseFloat(match[1]);var type=(match[2]||'ms').toLowerCase();switch(type){case 'years':case 'year':case 'yrs':case 'yr':case 'y':return n*y;case 'days':case 'day':case 'd':return n*d;case 'hours':case 'hour':case 'hrs':case 'hr':case 'h':return n*h;case 'minutes':case 'minute':case 'mins':case 'min':case 'm':return n*m;case 'seconds':case 'second':case 'secs':case 'sec':case 's':return n*s;case 'milliseconds':case 'millisecond':case 'msecs':case 'msec':case 'ms':return n;}} /**
+ * Short format for `ms`.
+ *
+ * @param {Number} ms
+ * @return {String}
+ * @api private
+ */function short(ms){if(ms>=d)return Math.round(ms/d)+'d';if(ms>=h)return Math.round(ms/h)+'h';if(ms>=m)return Math.round(ms/m)+'m';if(ms>=s)return Math.round(ms/s)+'s';return ms+'ms';} /**
+ * Long format for `ms`.
+ *
+ * @param {Number} ms
+ * @return {String}
+ * @api private
+ */function long(ms){return plural(ms,d,'day')||plural(ms,h,'hour')||plural(ms,m,'minute')||plural(ms,s,'second')||ms+' ms';} /**
+ * Pluralization helper.
+ */function plural(ms,n,name){if(ms<n)return;if(ms<n*1.5)return Math.floor(ms/n)+' '+name;return Math.ceil(ms/n)+' '+name+'s';}},{}],26:[function(_dereq_,module,exports){(function(global){ /**
+ * JSON parse.
+ *
+ * @see Based on jQuery#parseJSON (MIT) and JSON2
+ * @api private
+ */var rvalidchars=/^[\],:{}\s]*$/;var rvalidescape=/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;var rvalidtokens=/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;var rvalidbraces=/(?:^|:|,)(?:\s*\[)+/g;var rtrimLeft=/^\s+/;var rtrimRight=/\s+$/;module.exports=function parsejson(data){if('string'!=typeof data||!data){return null;}data=data.replace(rtrimLeft,'').replace(rtrimRight,''); // Attempt to parse using the native JSON parser first
+if(global.JSON&&JSON.parse){return JSON.parse(data);}if(rvalidchars.test(data.replace(rvalidescape,'@').replace(rvalidtokens,']').replace(rvalidbraces,''))){return new Function('return '+data)();}};}).call(this,typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:{});},{}],27:[function(_dereq_,module,exports){ /**
+ * Compiles a querystring
+ * Returns string representation of the object
+ *
+ * @param {Object}
+ * @api private
+ */exports.encode=function(obj){var str='';for(var i in obj){if(obj.hasOwnProperty(i)){if(str.length)str+='&';str+=encodeURIComponent(i)+'='+encodeURIComponent(obj[i]);}}return str;}; /**
+ * Parses a simple querystring into an object
+ *
+ * @param {String} qs
+ * @api private
+ */exports.decode=function(qs){var qry={};var pairs=qs.split('&');for(var i=0,l=pairs.length;i<l;i++){var pair=pairs[i].split('=');qry[decodeURIComponent(pair[0])]=decodeURIComponent(pair[1]);}return qry;};},{}],28:[function(_dereq_,module,exports){ /**
+ * Parses an URI
+ *
+ * @author Steven Levithan <stevenlevithan.com> (MIT license)
+ * @api private
+ */var re=/^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;var parts=['source','protocol','authority','userInfo','user','password','host','port','relative','path','directory','file','query','anchor'];module.exports=function parseuri(str){var src=str,b=str.indexOf('['),e=str.indexOf(']');if(b!=-1&&e!=-1){str=str.substring(0,b)+str.substring(b,e).replace(/:/g,';')+str.substring(e,str.length);}var m=re.exec(str||''),uri={},i=14;while(i--){uri[parts[i]]=m[i]||'';}if(b!=-1&&e!=-1){uri.source=src;uri.host=uri.host.substring(1,uri.host.length-1).replace(/;/g,':');uri.authority=uri.authority.replace('[','').replace(']','').replace(/;/g,':');uri.ipv6uri=true;}return uri;};},{}],29:[function(_dereq_,module,exports){(function(global){ /*! https://mths.be/utf8js v2.0.0 by @mathias */;(function(root){ // Detect free variables `exports`
+var freeExports=(typeof exports==="undefined"?"undefined":_typeof(exports))=='object'&&exports; // Detect free variable `module`
+var freeModule=(typeof module==="undefined"?"undefined":_typeof(module))=='object'&&module&&module.exports==freeExports&&module; // Detect free variable `global`, from Node.js or Browserified code,
+// and use it as `root`
+var freeGlobal=(typeof global==="undefined"?"undefined":_typeof(global))=='object'&&global;if(freeGlobal.global===freeGlobal||freeGlobal.window===freeGlobal){root=freeGlobal;} /*--------------------------------------------------------------------------*/var stringFromCharCode=String.fromCharCode; // Taken from https://mths.be/punycode
+function ucs2decode(string){var output=[];var counter=0;var length=string.length;var value;var extra;while(counter<length){value=string.charCodeAt(counter++);if(value>=0xD800&&value<=0xDBFF&&counter<length){ // high surrogate, and there is a next character
+extra=string.charCodeAt(counter++);if((extra&0xFC00)==0xDC00){ // low surrogate
+output.push(((value&0x3FF)<<10)+(extra&0x3FF)+0x10000);}else { // unmatched surrogate; only append this code unit, in case the next
+// code unit is the high surrogate of a surrogate pair
+output.push(value);counter--;}}else {output.push(value);}}return output;} // Taken from https://mths.be/punycode
+function ucs2encode(array){var length=array.length;var index=-1;var value;var output='';while(++index<length){value=array[index];if(value>0xFFFF){value-=0x10000;output+=stringFromCharCode(value>>>10&0x3FF|0xD800);value=0xDC00|value&0x3FF;}output+=stringFromCharCode(value);}return output;}function checkScalarValue(codePoint){if(codePoint>=0xD800&&codePoint<=0xDFFF){throw Error('Lone surrogate U+'+codePoint.toString(16).toUpperCase()+' is not a scalar value');}} /*--------------------------------------------------------------------------*/function createByte(codePoint,shift){return stringFromCharCode(codePoint>>shift&0x3F|0x80);}function encodeCodePoint(codePoint){if((codePoint&0xFFFFFF80)==0){ // 1-byte sequence
+return stringFromCharCode(codePoint);}var symbol='';if((codePoint&0xFFFFF800)==0){ // 2-byte sequence
+symbol=stringFromCharCode(codePoint>>6&0x1F|0xC0);}else if((codePoint&0xFFFF0000)==0){ // 3-byte sequence
+checkScalarValue(codePoint);symbol=stringFromCharCode(codePoint>>12&0x0F|0xE0);symbol+=createByte(codePoint,6);}else if((codePoint&0xFFE00000)==0){ // 4-byte sequence
+symbol=stringFromCharCode(codePoint>>18&0x07|0xF0);symbol+=createByte(codePoint,12);symbol+=createByte(codePoint,6);}symbol+=stringFromCharCode(codePoint&0x3F|0x80);return symbol;}function utf8encode(string){var codePoints=ucs2decode(string);var length=codePoints.length;var index=-1;var codePoint;var byteString='';while(++index<length){codePoint=codePoints[index];byteString+=encodeCodePoint(codePoint);}return byteString;} /*--------------------------------------------------------------------------*/function readContinuationByte(){if(byteIndex>=byteCount){throw Error('Invalid byte index');}var continuationByte=byteArray[byteIndex]&0xFF;byteIndex++;if((continuationByte&0xC0)==0x80){return continuationByte&0x3F;} // If we end up here, it’s not a continuation byte
+throw Error('Invalid continuation byte');}function decodeSymbol(){var byte1;var byte2;var byte3;var byte4;var codePoint;if(byteIndex>byteCount){throw Error('Invalid byte index');}if(byteIndex==byteCount){return false;} // Read first byte
+byte1=byteArray[byteIndex]&0xFF;byteIndex++; // 1-byte sequence (no continuation bytes)
+if((byte1&0x80)==0){return byte1;} // 2-byte sequence
+if((byte1&0xE0)==0xC0){var byte2=readContinuationByte();codePoint=(byte1&0x1F)<<6|byte2;if(codePoint>=0x80){return codePoint;}else {throw Error('Invalid continuation byte');}} // 3-byte sequence (may include unpaired surrogates)
+if((byte1&0xF0)==0xE0){byte2=readContinuationByte();byte3=readContinuationByte();codePoint=(byte1&0x0F)<<12|byte2<<6|byte3;if(codePoint>=0x0800){checkScalarValue(codePoint);return codePoint;}else {throw Error('Invalid continuation byte');}} // 4-byte sequence
+if((byte1&0xF8)==0xF0){byte2=readContinuationByte();byte3=readContinuationByte();byte4=readContinuationByte();codePoint=(byte1&0x0F)<<0x12|byte2<<0x0C|byte3<<0x06|byte4;if(codePoint>=0x010000&&codePoint<=0x10FFFF){return codePoint;}}throw Error('Invalid UTF-8 detected');}var byteArray;var byteCount;var byteIndex;function utf8decode(byteString){byteArray=ucs2decode(byteString);byteCount=byteArray.length;byteIndex=0;var codePoints=[];var tmp;while((tmp=decodeSymbol())!==false){codePoints.push(tmp);}return ucs2encode(codePoints);} /*--------------------------------------------------------------------------*/var utf8={'version':'2.0.0','encode':utf8encode,'decode':utf8decode}; // Some AMD build optimizers, like r.js, check for specific condition patterns
+// like the following:
+if(typeof define=='function'&&_typeof(define.amd)=='object'&&define.amd){define(function(){return utf8;});}else if(freeExports&&!freeExports.nodeType){if(freeModule){ // in Node.js or RingoJS v0.8.0+
+freeModule.exports=utf8;}else { // in Narwhal or RingoJS v0.7.0-
+var object={};var hasOwnProperty=object.hasOwnProperty;for(var key in utf8){hasOwnProperty.call(utf8,key)&&(freeExports[key]=utf8[key]);}}}else { // in Rhino or a web browser
+root.utf8=utf8;}})(this);}).call(this,typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:{});},{}],30:[function(_dereq_,module,exports){'use strict';var alphabet='0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_'.split(''),length=64,map={},seed=0,i=0,prev; /**
+ * Return a string representing the specified number.
+ *
+ * @param {Number} num The number to convert.
+ * @returns {String} The string representation of the number.
+ * @api public
+ */function encode(num){var encoded='';do {encoded=alphabet[num%length]+encoded;num=Math.floor(num/length);}while(num>0);return encoded;} /**
+ * Return the integer value specified by the given string.
+ *
+ * @param {String} str The string to convert.
+ * @returns {Number} The integer value represented by the string.
+ * @api public
+ */function decode(str){var decoded=0;for(i=0;i<str.length;i++){decoded=decoded*length+map[str.charAt(i)];}return decoded;} /**
+ * Yeast: A tiny growing id generator.
+ *
+ * @returns {String} A unique id.
+ * @api public
+ */function yeast(){var now=encode(+new Date());if(now!==prev)return seed=0,prev=now;return now+'.'+encode(seed++);} //
+// Map each character to its index.
+//
+for(;i<length;i++){map[alphabet[i]]=i;} //
+// Expose the `yeast`, `encode` and `decode` functions.
+//
+yeast.encode=encode;yeast.decode=decode;module.exports=yeast;},{}],31:[function(_dereq_,module,exports){ /**
+ * Module dependencies.
+ */var url=_dereq_('./url');var parser=_dereq_('socket.io-parser');var Manager=_dereq_('./manager');var debug=_dereq_('debug')('socket.io-client'); /**
+ * Module exports.
+ */module.exports=exports=lookup; /**
+ * Managers cache.
+ */var cache=exports.managers={}; /**
+ * Looks up an existing `Manager` for multiplexing.
+ * If the user summons:
+ *
+ *   `io('http://localhost/a');`
+ *   `io('http://localhost/b');`
+ *
+ * We reuse the existing instance based on same scheme/port/host,
+ * and we initialize sockets for each namespace.
+ *
+ * @api public
+ */function lookup(uri,opts){if((typeof uri==="undefined"?"undefined":_typeof(uri))=='object'){opts=uri;uri=undefined;}opts=opts||{};var parsed=url(uri);var source=parsed.source;var id=parsed.id;var path=parsed.path;var sameNamespace=cache[id]&&path in cache[id].nsps;var newConnection=opts.forceNew||opts['force new connection']||false===opts.multiplex||sameNamespace;var io;if(newConnection){debug('ignoring socket cache for %s',source);io=Manager(source,opts);}else {if(!cache[id]){debug('new io instance for %s',source);cache[id]=Manager(source,opts);}io=cache[id];}return io.socket(parsed.path);} /**
+ * Protocol version.
+ *
+ * @api public
+ */exports.protocol=parser.protocol; /**
+ * `connect`.
+ *
+ * @param {String} uri
+ * @api public
+ */exports.connect=lookup; /**
+ * Expose constructors for standalone build.
+ *
+ * @api public
+ */exports.Manager=_dereq_('./manager');exports.Socket=_dereq_('./socket');},{"./manager":32,"./socket":34,"./url":35,"debug":39,"socket.io-parser":47}],32:[function(_dereq_,module,exports){ /**
+ * Module dependencies.
+ */var eio=_dereq_('engine.io-client');var Socket=_dereq_('./socket');var Emitter=_dereq_('component-emitter');var parser=_dereq_('socket.io-parser');var on=_dereq_('./on');var bind=_dereq_('component-bind');var debug=_dereq_('debug')('socket.io-client:manager');var indexOf=_dereq_('indexof');var Backoff=_dereq_('backo2'); /**
+ * IE6+ hasOwnProperty
+ */var has=Object.prototype.hasOwnProperty; /**
+ * Module exports
+ */module.exports=Manager; /**
+ * `Manager` constructor.
+ *
+ * @param {String} engine instance or engine uri/opts
+ * @param {Object} options
+ * @api public
+ */function Manager(uri,opts){if(!(this instanceof Manager))return new Manager(uri,opts);if(uri&&'object'==(typeof uri==="undefined"?"undefined":_typeof(uri))){opts=uri;uri=undefined;}opts=opts||{};opts.path=opts.path||'/socket.io';this.nsps={};this.subs=[];this.opts=opts;this.reconnection(opts.reconnection!==false);this.reconnectionAttempts(opts.reconnectionAttempts||Infinity);this.reconnectionDelay(opts.reconnectionDelay||1000);this.reconnectionDelayMax(opts.reconnectionDelayMax||5000);this.randomizationFactor(opts.randomizationFactor||0.5);this.backoff=new Backoff({min:this.reconnectionDelay(),max:this.reconnectionDelayMax(),jitter:this.randomizationFactor()});this.timeout(null==opts.timeout?20000:opts.timeout);this.readyState='closed';this.uri=uri;this.connecting=[];this.lastPing=null;this.encoding=false;this.packetBuffer=[];this.encoder=new parser.Encoder();this.decoder=new parser.Decoder();this.autoConnect=opts.autoConnect!==false;if(this.autoConnect)this.open();} /**
+ * Propagate given event to sockets and emit on `this`
+ *
+ * @api private
+ */Manager.prototype.emitAll=function(){this.emit.apply(this,arguments);for(var nsp in this.nsps){if(has.call(this.nsps,nsp)){this.nsps[nsp].emit.apply(this.nsps[nsp],arguments);}}}; /**
+ * Update `socket.id` of all sockets
+ *
+ * @api private
+ */Manager.prototype.updateSocketIds=function(){for(var nsp in this.nsps){if(has.call(this.nsps,nsp)){this.nsps[nsp].id=this.engine.id;}}}; /**
+ * Mix in `Emitter`.
+ */Emitter(Manager.prototype); /**
+ * Sets the `reconnection` config.
+ *
+ * @param {Boolean} true/false if it should automatically reconnect
+ * @return {Manager} self or value
+ * @api public
+ */Manager.prototype.reconnection=function(v){if(!arguments.length)return this._reconnection;this._reconnection=!!v;return this;}; /**
+ * Sets the reconnection attempts config.
+ *
+ * @param {Number} max reconnection attempts before giving up
+ * @return {Manager} self or value
+ * @api public
+ */Manager.prototype.reconnectionAttempts=function(v){if(!arguments.length)return this._reconnectionAttempts;this._reconnectionAttempts=v;return this;}; /**
+ * Sets the delay between reconnections.
+ *
+ * @param {Number} delay
+ * @return {Manager} self or value
+ * @api public
+ */Manager.prototype.reconnectionDelay=function(v){if(!arguments.length)return this._reconnectionDelay;this._reconnectionDelay=v;this.backoff&&this.backoff.setMin(v);return this;};Manager.prototype.randomizationFactor=function(v){if(!arguments.length)return this._randomizationFactor;this._randomizationFactor=v;this.backoff&&this.backoff.setJitter(v);return this;}; /**
+ * Sets the maximum delay between reconnections.
+ *
+ * @param {Number} delay
+ * @return {Manager} self or value
+ * @api public
+ */Manager.prototype.reconnectionDelayMax=function(v){if(!arguments.length)return this._reconnectionDelayMax;this._reconnectionDelayMax=v;this.backoff&&this.backoff.setMax(v);return this;}; /**
+ * Sets the connection timeout. `false` to disable
+ *
+ * @return {Manager} self or value
+ * @api public
+ */Manager.prototype.timeout=function(v){if(!arguments.length)return this._timeout;this._timeout=v;return this;}; /**
+ * Starts trying to reconnect if reconnection is enabled and we have not
+ * started reconnecting yet
+ *
+ * @api private
+ */Manager.prototype.maybeReconnectOnOpen=function(){ // Only try to reconnect if it's the first time we're connecting
+if(!this.reconnecting&&this._reconnection&&this.backoff.attempts===0){ // keeps reconnection from firing twice for the same reconnection loop
+this.reconnect();}}; /**
+ * Sets the current transport `socket`.
+ *
+ * @param {Function} optional, callback
+ * @return {Manager} self
+ * @api public
+ */Manager.prototype.open=Manager.prototype.connect=function(fn){debug('readyState %s',this.readyState);if(~this.readyState.indexOf('open'))return this;debug('opening %s',this.uri);this.engine=eio(this.uri,this.opts);var socket=this.engine;var self=this;this.readyState='opening';this.skipReconnect=false; // emit `open`
+var openSub=on(socket,'open',function(){self.onopen();fn&&fn();}); // emit `connect_error`
+var errorSub=on(socket,'error',function(data){debug('connect_error');self.cleanup();self.readyState='closed';self.emitAll('connect_error',data);if(fn){var err=new Error('Connection error');err.data=data;fn(err);}else { // Only do this if there is no fn to handle the error
+self.maybeReconnectOnOpen();}}); // emit `connect_timeout`
+if(false!==this._timeout){var timeout=this._timeout;debug('connect attempt will timeout after %d',timeout); // set timer
+var timer=setTimeout(function(){debug('connect attempt timed out after %d',timeout);openSub.destroy();socket.close();socket.emit('error','timeout');self.emitAll('connect_timeout',timeout);},timeout);this.subs.push({destroy:function destroy(){clearTimeout(timer);}});}this.subs.push(openSub);this.subs.push(errorSub);return this;}; /**
+ * Called upon transport open.
+ *
+ * @api private
+ */Manager.prototype.onopen=function(){debug('open'); // clear old subs
+this.cleanup(); // mark as open
+this.readyState='open';this.emit('open'); // add new subs
+var socket=this.engine;this.subs.push(on(socket,'data',bind(this,'ondata')));this.subs.push(on(socket,'ping',bind(this,'onping')));this.subs.push(on(socket,'pong',bind(this,'onpong')));this.subs.push(on(socket,'error',bind(this,'onerror')));this.subs.push(on(socket,'close',bind(this,'onclose')));this.subs.push(on(this.decoder,'decoded',bind(this,'ondecoded')));}; /**
+ * Called upon a ping.
+ *
+ * @api private
+ */Manager.prototype.onping=function(){this.lastPing=new Date();this.emitAll('ping');}; /**
+ * Called upon a packet.
+ *
+ * @api private
+ */Manager.prototype.onpong=function(){this.emitAll('pong',new Date()-this.lastPing);}; /**
+ * Called with data.
+ *
+ * @api private
+ */Manager.prototype.ondata=function(data){this.decoder.add(data);}; /**
+ * Called when parser fully decodes a packet.
+ *
+ * @api private
+ */Manager.prototype.ondecoded=function(packet){this.emit('packet',packet);}; /**
+ * Called upon socket error.
+ *
+ * @api private
+ */Manager.prototype.onerror=function(err){debug('error',err);this.emitAll('error',err);}; /**
+ * Creates a new socket for the given `nsp`.
+ *
+ * @return {Socket}
+ * @api public
+ */Manager.prototype.socket=function(nsp){var socket=this.nsps[nsp];if(!socket){socket=new Socket(this,nsp);this.nsps[nsp]=socket;var self=this;socket.on('connecting',onConnecting);socket.on('connect',function(){socket.id=self.engine.id;});if(this.autoConnect){ // manually call here since connecting evnet is fired before listening
+onConnecting();}}function onConnecting(){if(! ~indexOf(self.connecting,socket)){self.connecting.push(socket);}}return socket;}; /**
+ * Called upon a socket close.
+ *
+ * @param {Socket} socket
+ */Manager.prototype.destroy=function(socket){var index=indexOf(this.connecting,socket);if(~index)this.connecting.splice(index,1);if(this.connecting.length)return;this.close();}; /**
+ * Writes a packet.
+ *
+ * @param {Object} packet
+ * @api private
+ */Manager.prototype.packet=function(packet){debug('writing packet %j',packet);var self=this;if(!self.encoding){ // encode, then write to engine with result
+self.encoding=true;this.encoder.encode(packet,function(encodedPackets){for(var i=0;i<encodedPackets.length;i++){self.engine.write(encodedPackets[i],packet.options);}self.encoding=false;self.processPacketQueue();});}else { // add packet to the queue
+self.packetBuffer.push(packet);}}; /**
+ * If packet buffer is non-empty, begins encoding the
+ * next packet in line.
+ *
+ * @api private
+ */Manager.prototype.processPacketQueue=function(){if(this.packetBuffer.length>0&&!this.encoding){var pack=this.packetBuffer.shift();this.packet(pack);}}; /**
+ * Clean up transport subscriptions and packet buffer.
+ *
+ * @api private
+ */Manager.prototype.cleanup=function(){debug('cleanup');var sub;while(sub=this.subs.shift()){sub.destroy();}this.packetBuffer=[];this.encoding=false;this.lastPing=null;this.decoder.destroy();}; /**
+ * Close the current socket.
+ *
+ * @api private
+ */Manager.prototype.close=Manager.prototype.disconnect=function(){debug('disconnect');this.skipReconnect=true;this.reconnecting=false;if('opening'==this.readyState){ // `onclose` will not fire because
+// an open event never happened
+this.cleanup();}this.backoff.reset();this.readyState='closed';if(this.engine)this.engine.close();}; /**
+ * Called upon engine close.
+ *
+ * @api private
+ */Manager.prototype.onclose=function(reason){debug('onclose');this.cleanup();this.backoff.reset();this.readyState='closed';this.emit('close',reason);if(this._reconnection&&!this.skipReconnect){this.reconnect();}}; /**
+ * Attempt a reconnection.
+ *
+ * @api private
+ */Manager.prototype.reconnect=function(){if(this.reconnecting||this.skipReconnect)return this;var self=this;if(this.backoff.attempts>=this._reconnectionAttempts){debug('reconnect failed');this.backoff.reset();this.emitAll('reconnect_failed');this.reconnecting=false;}else {var delay=this.backoff.duration();debug('will wait %dms before reconnect attempt',delay);this.reconnecting=true;var timer=setTimeout(function(){if(self.skipReconnect)return;debug('attempting reconnect');self.emitAll('reconnect_attempt',self.backoff.attempts);self.emitAll('reconnecting',self.backoff.attempts); // check again for the case socket closed in above events
+if(self.skipReconnect)return;self.open(function(err){if(err){debug('reconnect attempt error');self.reconnecting=false;self.reconnect();self.emitAll('reconnect_error',err.data);}else {debug('reconnect success');self.onreconnect();}});},delay);this.subs.push({destroy:function destroy(){clearTimeout(timer);}});}}; /**
+ * Called upon successful reconnect.
+ *
+ * @api private
+ */Manager.prototype.onreconnect=function(){var attempt=this.backoff.attempts;this.reconnecting=false;this.backoff.reset();this.updateSocketIds();this.emitAll('reconnect',attempt);};},{"./on":33,"./socket":34,"backo2":36,"component-bind":37,"component-emitter":38,"debug":39,"engine.io-client":1,"indexof":42,"socket.io-parser":47}],33:[function(_dereq_,module,exports){ /**
+ * Module exports.
+ */module.exports=on; /**
+ * Helper for subscriptions.
+ *
+ * @param {Object|EventEmitter} obj with `Emitter` mixin or `EventEmitter`
+ * @param {String} event name
+ * @param {Function} callback
+ * @api public
+ */function on(obj,ev,fn){obj.on(ev,fn);return {destroy:function destroy(){obj.removeListener(ev,fn);}};}},{}],34:[function(_dereq_,module,exports){ /**
+ * Module dependencies.
+ */var parser=_dereq_('socket.io-parser');var Emitter=_dereq_('component-emitter');var toArray=_dereq_('to-array');var on=_dereq_('./on');var bind=_dereq_('component-bind');var debug=_dereq_('debug')('socket.io-client:socket');var hasBin=_dereq_('has-binary'); /**
+ * Module exports.
+ */module.exports=exports=Socket; /**
+ * Internal events (blacklisted).
+ * These events can't be emitted by the user.
+ *
+ * @api private
+ */var events={connect:1,connect_error:1,connect_timeout:1,connecting:1,disconnect:1,error:1,reconnect:1,reconnect_attempt:1,reconnect_failed:1,reconnect_error:1,reconnecting:1,ping:1,pong:1}; /**
+ * Shortcut to `Emitter#emit`.
+ */var emit=Emitter.prototype.emit; /**
+ * `Socket` constructor.
+ *
+ * @api public
+ */function Socket(io,nsp){this.io=io;this.nsp=nsp;this.json=this; // compat
+this.ids=0;this.acks={};this.receiveBuffer=[];this.sendBuffer=[];this.connected=false;this.disconnected=true;if(this.io.autoConnect)this.open();} /**
+ * Mix in `Emitter`.
+ */Emitter(Socket.prototype); /**
+ * Subscribe to open, close and packet events
+ *
+ * @api private
+ */Socket.prototype.subEvents=function(){if(this.subs)return;var io=this.io;this.subs=[on(io,'open',bind(this,'onopen')),on(io,'packet',bind(this,'onpacket')),on(io,'close',bind(this,'onclose'))];}; /**
+ * "Opens" the socket.
+ *
+ * @api public
+ */Socket.prototype.open=Socket.prototype.connect=function(){if(this.connected)return this;this.subEvents();this.io.open(); // ensure open
+if('open'==this.io.readyState)this.onopen();this.emit('connecting');return this;}; /**
+ * Sends a `message` event.
+ *
+ * @return {Socket} self
+ * @api public
+ */Socket.prototype.send=function(){var args=toArray(arguments);args.unshift('message');this.emit.apply(this,args);return this;}; /**
+ * Override `emit`.
+ * If the event is in `events`, it's emitted normally.
+ *
+ * @param {String} event name
+ * @return {Socket} self
+ * @api public
+ */Socket.prototype.emit=function(ev){if(events.hasOwnProperty(ev)){emit.apply(this,arguments);return this;}var args=toArray(arguments);var parserType=parser.EVENT; // default
+if(hasBin(args)){parserType=parser.BINARY_EVENT;} // binary
+var packet={type:parserType,data:args};packet.options={};packet.options.compress=!this.flags||false!==this.flags.compress; // event ack callback
+if('function'==typeof args[args.length-1]){debug('emitting packet with ack id %d',this.ids);this.acks[this.ids]=args.pop();packet.id=this.ids++;}if(this.connected){this.packet(packet);}else {this.sendBuffer.push(packet);}delete this.flags;return this;}; /**
+ * Sends a packet.
+ *
+ * @param {Object} packet
+ * @api private
+ */Socket.prototype.packet=function(packet){packet.nsp=this.nsp;this.io.packet(packet);}; /**
+ * Called upon engine `open`.
+ *
+ * @api private
+ */Socket.prototype.onopen=function(){debug('transport is open - connecting'); // write connect packet if necessary
+if('/'!=this.nsp){this.packet({type:parser.CONNECT});}}; /**
+ * Called upon engine `close`.
+ *
+ * @param {String} reason
+ * @api private
+ */Socket.prototype.onclose=function(reason){debug('close (%s)',reason);this.connected=false;this.disconnected=true;delete this.id;this.emit('disconnect',reason);}; /**
+ * Called with socket packet.
+ *
+ * @param {Object} packet
+ * @api private
+ */Socket.prototype.onpacket=function(packet){if(packet.nsp!=this.nsp)return;switch(packet.type){case parser.CONNECT:this.onconnect();break;case parser.EVENT:this.onevent(packet);break;case parser.BINARY_EVENT:this.onevent(packet);break;case parser.ACK:this.onack(packet);break;case parser.BINARY_ACK:this.onack(packet);break;case parser.DISCONNECT:this.ondisconnect();break;case parser.ERROR:this.emit('error',packet.data);break;}}; /**
+ * Called upon a server event.
+ *
+ * @param {Object} packet
+ * @api private
+ */Socket.prototype.onevent=function(packet){var args=packet.data||[];debug('emitting event %j',args);if(null!=packet.id){debug('attaching ack callback to event');args.push(this.ack(packet.id));}if(this.connected){emit.apply(this,args);}else {this.receiveBuffer.push(args);}}; /**
+ * Produces an ack callback to emit with an event.
+ *
+ * @api private
+ */Socket.prototype.ack=function(id){var self=this;var sent=false;return function(){ // prevent double callbacks
+if(sent)return;sent=true;var args=toArray(arguments);debug('sending ack %j',args);var type=hasBin(args)?parser.BINARY_ACK:parser.ACK;self.packet({type:type,id:id,data:args});};}; /**
+ * Called upon a server acknowlegement.
+ *
+ * @param {Object} packet
+ * @api private
+ */Socket.prototype.onack=function(packet){var ack=this.acks[packet.id];if('function'==typeof ack){debug('calling ack %s with %j',packet.id,packet.data);ack.apply(this,packet.data);delete this.acks[packet.id];}else {debug('bad ack %s',packet.id);}}; /**
+ * Called upon server connect.
+ *
+ * @api private
+ */Socket.prototype.onconnect=function(){this.connected=true;this.disconnected=false;this.emit('connect');this.emitBuffered();}; /**
+ * Emit buffered events (received and emitted).
+ *
+ * @api private
+ */Socket.prototype.emitBuffered=function(){var i;for(i=0;i<this.receiveBuffer.length;i++){emit.apply(this,this.receiveBuffer[i]);}this.receiveBuffer=[];for(i=0;i<this.sendBuffer.length;i++){this.packet(this.sendBuffer[i]);}this.sendBuffer=[];}; /**
+ * Called upon server disconnect.
+ *
+ * @api private
+ */Socket.prototype.ondisconnect=function(){debug('server disconnect (%s)',this.nsp);this.destroy();this.onclose('io server disconnect');}; /**
+ * Called upon forced client/server side disconnections,
+ * this method ensures the manager stops tracking us and
+ * that reconnections don't get triggered for this.
+ *
+ * @api private.
+ */Socket.prototype.destroy=function(){if(this.subs){ // clean subscriptions to avoid reconnections
+for(var i=0;i<this.subs.length;i++){this.subs[i].destroy();}this.subs=null;}this.io.destroy(this);}; /**
+ * Disconnects the socket manually.
+ *
+ * @return {Socket} self
+ * @api public
+ */Socket.prototype.close=Socket.prototype.disconnect=function(){if(this.connected){debug('performing disconnect (%s)',this.nsp);this.packet({type:parser.DISCONNECT});} // remove socket from pool
+this.destroy();if(this.connected){ // fire events
+this.onclose('io client disconnect');}return this;}; /**
+ * Sets the compress flag.
+ *
+ * @param {Boolean} if `true`, compresses the sending data
+ * @return {Socket} self
+ * @api public
+ */Socket.prototype.compress=function(compress){this.flags=this.flags||{};this.flags.compress=compress;return this;};},{"./on":33,"component-bind":37,"component-emitter":38,"debug":39,"has-binary":41,"socket.io-parser":47,"to-array":51}],35:[function(_dereq_,module,exports){(function(global){ /**
+ * Module dependencies.
+ */var parseuri=_dereq_('parseuri');var debug=_dereq_('debug')('socket.io-client:url'); /**
+ * Module exports.
+ */module.exports=url; /**
+ * URL parser.
+ *
+ * @param {String} url
+ * @param {Object} An object meant to mimic window.location.
+ *                 Defaults to window.location.
+ * @api public
+ */function url(uri,loc){var obj=uri; // default to window.location
+var loc=loc||global.location;if(null==uri)uri=loc.protocol+'//'+loc.host; // relative path support
+if('string'==typeof uri){if('/'==uri.charAt(0)){if('/'==uri.charAt(1)){uri=loc.protocol+uri;}else {uri=loc.host+uri;}}if(!/^(https?|wss?):\/\//.test(uri)){debug('protocol-less url %s',uri);if('undefined'!=typeof loc){uri=loc.protocol+'//'+uri;}else {uri='https://'+uri;}} // parse
+debug('parse %s',uri);obj=parseuri(uri);} // make sure we treat `localhost:80` and `localhost` equally
+if(!obj.port){if(/^(http|ws)$/.test(obj.protocol)){obj.port='80';}else if(/^(http|ws)s$/.test(obj.protocol)){obj.port='443';}}obj.path=obj.path||'/';var ipv6=obj.host.indexOf(':')!==-1;var host=ipv6?'['+obj.host+']':obj.host; // define unique id
+obj.id=obj.protocol+'://'+host+':'+obj.port; // define href
+obj.href=obj.protocol+'://'+host+(loc&&loc.port==obj.port?'':':'+obj.port);return obj;}}).call(this,typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:{});},{"debug":39,"parseuri":45}],36:[function(_dereq_,module,exports){ /**
+ * Expose `Backoff`.
+ */module.exports=Backoff; /**
+ * Initialize backoff timer with `opts`.
+ *
+ * - `min` initial timeout in milliseconds [100]
+ * - `max` max timeout [10000]
+ * - `jitter` [0]
+ * - `factor` [2]
+ *
+ * @param {Object} opts
+ * @api public
+ */function Backoff(opts){opts=opts||{};this.ms=opts.min||100;this.max=opts.max||10000;this.factor=opts.factor||2;this.jitter=opts.jitter>0&&opts.jitter<=1?opts.jitter:0;this.attempts=0;} /**
+ * Return the backoff duration.
+ *
+ * @return {Number}
+ * @api public
+ */Backoff.prototype.duration=function(){var ms=this.ms*Math.pow(this.factor,this.attempts++);if(this.jitter){var rand=Math.random();var deviation=Math.floor(rand*this.jitter*ms);ms=(Math.floor(rand*10)&1)==0?ms-deviation:ms+deviation;}return Math.min(ms,this.max)|0;}; /**
+ * Reset the number of attempts.
+ *
+ * @api public
+ */Backoff.prototype.reset=function(){this.attempts=0;}; /**
+ * Set the minimum duration
+ *
+ * @api public
+ */Backoff.prototype.setMin=function(min){this.ms=min;}; /**
+ * Set the maximum duration
+ *
+ * @api public
+ */Backoff.prototype.setMax=function(max){this.max=max;}; /**
+ * Set the jitter
+ *
+ * @api public
+ */Backoff.prototype.setJitter=function(jitter){this.jitter=jitter;};},{}],37:[function(_dereq_,module,exports){ /**
+ * Slice reference.
+ */var slice=[].slice; /**
+ * Bind `obj` to `fn`.
+ *
+ * @param {Object} obj
+ * @param {Function|String} fn or string
+ * @return {Function}
+ * @api public
+ */module.exports=function(obj,fn){if('string'==typeof fn)fn=obj[fn];if('function'!=typeof fn)throw new Error('bind() requires a function');var args=slice.call(arguments,2);return function(){return fn.apply(obj,args.concat(slice.call(arguments)));};};},{}],38:[function(_dereq_,module,exports){ /**
+ * Expose `Emitter`.
+ */module.exports=Emitter; /**
+ * Initialize a new `Emitter`.
+ *
+ * @api public
+ */function Emitter(obj){if(obj)return mixin(obj);}; /**
+ * Mixin the emitter properties.
+ *
+ * @param {Object} obj
+ * @return {Object}
+ * @api private
+ */function mixin(obj){for(var key in Emitter.prototype){obj[key]=Emitter.prototype[key];}return obj;} /**
+ * Listen on the given `event` with `fn`.
+ *
+ * @param {String} event
+ * @param {Function} fn
+ * @return {Emitter}
+ * @api public
+ */Emitter.prototype.on=Emitter.prototype.addEventListener=function(event,fn){this._callbacks=this._callbacks||{};(this._callbacks['$'+event]=this._callbacks['$'+event]||[]).push(fn);return this;}; /**
+ * Adds an `event` listener that will be invoked a single
+ * time then automatically removed.
+ *
+ * @param {String} event
+ * @param {Function} fn
+ * @return {Emitter}
+ * @api public
+ */Emitter.prototype.once=function(event,fn){function on(){this.off(event,on);fn.apply(this,arguments);}on.fn=fn;this.on(event,on);return this;}; /**
+ * Remove the given callback for `event` or all
+ * registered callbacks.
+ *
+ * @param {String} event
+ * @param {Function} fn
+ * @return {Emitter}
+ * @api public
+ */Emitter.prototype.off=Emitter.prototype.removeListener=Emitter.prototype.removeAllListeners=Emitter.prototype.removeEventListener=function(event,fn){this._callbacks=this._callbacks||{}; // all
+if(0==arguments.length){this._callbacks={};return this;} // specific event
+var callbacks=this._callbacks['$'+event];if(!callbacks)return this; // remove all handlers
+if(1==arguments.length){delete this._callbacks['$'+event];return this;} // remove specific handler
+var cb;for(var i=0;i<callbacks.length;i++){cb=callbacks[i];if(cb===fn||cb.fn===fn){callbacks.splice(i,1);break;}}return this;}; /**
+ * Emit `event` with the given args.
+ *
+ * @param {String} event
+ * @param {Mixed} ...
+ * @return {Emitter}
+ */Emitter.prototype.emit=function(event){this._callbacks=this._callbacks||{};var args=[].slice.call(arguments,1),callbacks=this._callbacks['$'+event];if(callbacks){callbacks=callbacks.slice(0);for(var i=0,len=callbacks.length;i<len;++i){callbacks[i].apply(this,args);}}return this;}; /**
+ * Return array of callbacks for `event`.
+ *
+ * @param {String} event
+ * @return {Array}
+ * @api public
+ */Emitter.prototype.listeners=function(event){this._callbacks=this._callbacks||{};return this._callbacks['$'+event]||[];}; /**
+ * Check if this emitter has `event` handlers.
+ *
+ * @param {String} event
+ * @return {Boolean}
+ * @api public
+ */Emitter.prototype.hasListeners=function(event){return !!this.listeners(event).length;};},{}],39:[function(_dereq_,module,exports){arguments[4][17][0].apply(exports,arguments);},{"./debug":40,"dup":17}],40:[function(_dereq_,module,exports){arguments[4][18][0].apply(exports,arguments);},{"dup":18,"ms":44}],41:[function(_dereq_,module,exports){(function(global){ /*
+ * Module requirements.
+ */var isArray=_dereq_('isarray'); /**
+ * Module exports.
+ */module.exports=hasBinary; /**
+ * Checks for binary data.
+ *
+ * Right now only Buffer and ArrayBuffer are supported..
+ *
+ * @param {Object} anything
+ * @api public
+ */function hasBinary(data){function _hasBinary(obj){if(!obj)return false;if(global.Buffer&&global.Buffer.isBuffer&&global.Buffer.isBuffer(obj)||global.ArrayBuffer&&obj instanceof ArrayBuffer||global.Blob&&obj instanceof Blob||global.File&&obj instanceof File){return true;}if(isArray(obj)){for(var i=0;i<obj.length;i++){if(_hasBinary(obj[i])){return true;}}}else if(obj&&'object'==(typeof obj==="undefined"?"undefined":_typeof(obj))){ // see: https://github.com/Automattic/has-binary/pull/4
+if(obj.toJSON&&'function'==typeof obj.toJSON){obj=obj.toJSON();}for(var key in obj){if(Object.prototype.hasOwnProperty.call(obj,key)&&_hasBinary(obj[key])){return true;}}}return false;}return _hasBinary(data);}}).call(this,typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:{});},{"isarray":43}],42:[function(_dereq_,module,exports){arguments[4][23][0].apply(exports,arguments);},{"dup":23}],43:[function(_dereq_,module,exports){arguments[4][24][0].apply(exports,arguments);},{"dup":24}],44:[function(_dereq_,module,exports){arguments[4][25][0].apply(exports,arguments);},{"dup":25}],45:[function(_dereq_,module,exports){arguments[4][28][0].apply(exports,arguments);},{"dup":28}],46:[function(_dereq_,module,exports){(function(global){ /*global Blob,File*/ /**
+ * Module requirements
+ */var isArray=_dereq_('isarray');var isBuf=_dereq_('./is-buffer'); /**
+ * Replaces every Buffer | ArrayBuffer in packet with a numbered placeholder.
+ * Anything with blobs or files should be fed through removeBlobs before coming
+ * here.
+ *
+ * @param {Object} packet - socket.io event packet
+ * @return {Object} with deconstructed packet and list of buffers
+ * @api public
+ */exports.deconstructPacket=function(packet){var buffers=[];var packetData=packet.data;function _deconstructPacket(data){if(!data)return data;if(isBuf(data)){var placeholder={_placeholder:true,num:buffers.length};buffers.push(data);return placeholder;}else if(isArray(data)){var newData=new Array(data.length);for(var i=0;i<data.length;i++){newData[i]=_deconstructPacket(data[i]);}return newData;}else if('object'==(typeof data==="undefined"?"undefined":_typeof(data))&&!(data instanceof Date)){var newData={};for(var key in data){newData[key]=_deconstructPacket(data[key]);}return newData;}return data;}var pack=packet;pack.data=_deconstructPacket(packetData);pack.attachments=buffers.length; // number of binary 'attachments'
+return {packet:pack,buffers:buffers};}; /**
+ * Reconstructs a binary packet from its placeholder packet and buffers
+ *
+ * @param {Object} packet - event packet with placeholders
+ * @param {Array} buffers - binary buffers to put in placeholder positions
+ * @return {Object} reconstructed packet
+ * @api public
+ */exports.reconstructPacket=function(packet,buffers){var curPlaceHolder=0;function _reconstructPacket(data){if(data&&data._placeholder){var buf=buffers[data.num]; // appropriate buffer (should be natural order anyway)
+return buf;}else if(isArray(data)){for(var i=0;i<data.length;i++){data[i]=_reconstructPacket(data[i]);}return data;}else if(data&&'object'==(typeof data==="undefined"?"undefined":_typeof(data))){for(var key in data){data[key]=_reconstructPacket(data[key]);}return data;}return data;}packet.data=_reconstructPacket(packet.data);packet.attachments=undefined; // no longer useful
+return packet;}; /**
+ * Asynchronously removes Blobs or Files from data via
+ * FileReader's readAsArrayBuffer method. Used before encoding
+ * data as msgpack. Calls callback with the blobless data.
+ *
+ * @param {Object} data
+ * @param {Function} callback
+ * @api private
+ */exports.removeBlobs=function(data,callback){function _removeBlobs(obj,curKey,containingObject){if(!obj)return obj; // convert any blob
+if(global.Blob&&obj instanceof Blob||global.File&&obj instanceof File){pendingBlobs++; // async filereader
+var fileReader=new FileReader();fileReader.onload=function(){ // this.result == arraybuffer
+if(containingObject){containingObject[curKey]=this.result;}else {bloblessData=this.result;} // if nothing pending its callback time
+if(! --pendingBlobs){callback(bloblessData);}};fileReader.readAsArrayBuffer(obj); // blob -> arraybuffer
+}else if(isArray(obj)){ // handle array
+for(var i=0;i<obj.length;i++){_removeBlobs(obj[i],i,obj);}}else if(obj&&'object'==(typeof obj==="undefined"?"undefined":_typeof(obj))&&!isBuf(obj)){ // and object
+for(var key in obj){_removeBlobs(obj[key],key,obj);}}}var pendingBlobs=0;var bloblessData=data;_removeBlobs(bloblessData);if(!pendingBlobs){callback(bloblessData);}};}).call(this,typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:{});},{"./is-buffer":48,"isarray":43}],47:[function(_dereq_,module,exports){ /**
+ * Module dependencies.
+ */var debug=_dereq_('debug')('socket.io-parser');var json=_dereq_('json3');var isArray=_dereq_('isarray');var Emitter=_dereq_('component-emitter');var binary=_dereq_('./binary');var isBuf=_dereq_('./is-buffer'); /**
+ * Protocol version.
+ *
+ * @api public
+ */exports.protocol=4; /**
+ * Packet types.
+ *
+ * @api public
+ */exports.types=['CONNECT','DISCONNECT','EVENT','BINARY_EVENT','ACK','BINARY_ACK','ERROR']; /**
+ * Packet type `connect`.
+ *
+ * @api public
+ */exports.CONNECT=0; /**
+ * Packet type `disconnect`.
+ *
+ * @api public
+ */exports.DISCONNECT=1; /**
+ * Packet type `event`.
+ *
+ * @api public
+ */exports.EVENT=2; /**
+ * Packet type `ack`.
+ *
+ * @api public
+ */exports.ACK=3; /**
+ * Packet type `error`.
+ *
+ * @api public
+ */exports.ERROR=4; /**
+ * Packet type 'binary event'
+ *
+ * @api public
+ */exports.BINARY_EVENT=5; /**
+ * Packet type `binary ack`. For acks with binary arguments.
+ *
+ * @api public
+ */exports.BINARY_ACK=6; /**
+ * Encoder constructor.
+ *
+ * @api public
+ */exports.Encoder=Encoder; /**
+ * Decoder constructor.
+ *
+ * @api public
+ */exports.Decoder=Decoder; /**
+ * A socket.io Encoder instance
+ *
+ * @api public
+ */function Encoder(){} /**
+ * Encode a packet as a single string if non-binary, or as a
+ * buffer sequence, depending on packet type.
+ *
+ * @param {Object} obj - packet object
+ * @param {Function} callback - function to handle encodings (likely engine.write)
+ * @return Calls callback with Array of encodings
+ * @api public
+ */Encoder.prototype.encode=function(obj,callback){debug('encoding packet %j',obj);if(exports.BINARY_EVENT==obj.type||exports.BINARY_ACK==obj.type){encodeAsBinary(obj,callback);}else {var encoding=encodeAsString(obj);callback([encoding]);}}; /**
+ * Encode packet as string.
+ *
+ * @param {Object} packet
+ * @return {String} encoded
+ * @api private
+ */function encodeAsString(obj){var str='';var nsp=false; // first is type
+str+=obj.type; // attachments if we have them
+if(exports.BINARY_EVENT==obj.type||exports.BINARY_ACK==obj.type){str+=obj.attachments;str+='-';} // if we have a namespace other than `/`
+// we append it followed by a comma `,`
+if(obj.nsp&&'/'!=obj.nsp){nsp=true;str+=obj.nsp;} // immediately followed by the id
+if(null!=obj.id){if(nsp){str+=',';nsp=false;}str+=obj.id;} // json data
+if(null!=obj.data){if(nsp)str+=',';str+=json.stringify(obj.data);}debug('encoded %j as %s',obj,str);return str;} /**
+ * Encode packet as 'buffer sequence' by removing blobs, and
+ * deconstructing packet into object with placeholders and
+ * a list of buffers.
+ *
+ * @param {Object} packet
+ * @return {Buffer} encoded
+ * @api private
+ */function encodeAsBinary(obj,callback){function writeEncoding(bloblessData){var deconstruction=binary.deconstructPacket(bloblessData);var pack=encodeAsString(deconstruction.packet);var buffers=deconstruction.buffers;buffers.unshift(pack); // add packet info to beginning of data list
+callback(buffers); // write all the buffers
+}binary.removeBlobs(obj,writeEncoding);} /**
+ * A socket.io Decoder instance
+ *
+ * @return {Object} decoder
+ * @api public
+ */function Decoder(){this.reconstructor=null;} /**
+ * Mix in `Emitter` with Decoder.
+ */Emitter(Decoder.prototype); /**
+ * Decodes an ecoded packet string into packet JSON.
+ *
+ * @param {String} obj - encoded packet
+ * @return {Object} packet
+ * @api public
+ */Decoder.prototype.add=function(obj){var packet;if('string'==typeof obj){packet=decodeString(obj);if(exports.BINARY_EVENT==packet.type||exports.BINARY_ACK==packet.type){ // binary packet's json
+this.reconstructor=new BinaryReconstructor(packet); // no attachments, labeled binary but no binary data to follow
+if(this.reconstructor.reconPack.attachments===0){this.emit('decoded',packet);}}else { // non-binary full packet
+this.emit('decoded',packet);}}else if(isBuf(obj)||obj.base64){ // raw binary data
+if(!this.reconstructor){throw new Error('got binary data when not reconstructing a packet');}else {packet=this.reconstructor.takeBinaryData(obj);if(packet){ // received final buffer
+this.reconstructor=null;this.emit('decoded',packet);}}}else {throw new Error('Unknown type: '+obj);}}; /**
+ * Decode a packet String (JSON data)
+ *
+ * @param {String} str
+ * @return {Object} packet
+ * @api private
+ */function decodeString(str){var p={};var i=0; // look up type
+p.type=Number(str.charAt(0));if(null==exports.types[p.type])return error(); // look up attachments if type binary
+if(exports.BINARY_EVENT==p.type||exports.BINARY_ACK==p.type){var buf='';while(str.charAt(++i)!='-'){buf+=str.charAt(i);if(i==str.length)break;}if(buf!=Number(buf)||str.charAt(i)!='-'){throw new Error('Illegal attachments');}p.attachments=Number(buf);} // look up namespace (if any)
+if('/'==str.charAt(i+1)){p.nsp='';while(++i){var c=str.charAt(i);if(','==c)break;p.nsp+=c;if(i==str.length)break;}}else {p.nsp='/';} // look up id
+var next=str.charAt(i+1);if(''!==next&&Number(next)==next){p.id='';while(++i){var c=str.charAt(i);if(null==c||Number(c)!=c){--i;break;}p.id+=str.charAt(i);if(i==str.length)break;}p.id=Number(p.id);} // look up json data
+if(str.charAt(++i)){try{p.data=json.parse(str.substr(i));}catch(e){return error();}}debug('decoded %s as %j',str,p);return p;} /**
+ * Deallocates a parser's resources
+ *
+ * @api public
+ */Decoder.prototype.destroy=function(){if(this.reconstructor){this.reconstructor.finishedReconstruction();}}; /**
+ * A manager of a binary event's 'buffer sequence'. Should
+ * be constructed whenever a packet of type BINARY_EVENT is
+ * decoded.
+ *
+ * @param {Object} packet
+ * @return {BinaryReconstructor} initialized reconstructor
+ * @api private
+ */function BinaryReconstructor(packet){this.reconPack=packet;this.buffers=[];} /**
+ * Method to be called when binary data received from connection
+ * after a BINARY_EVENT packet.
+ *
+ * @param {Buffer | ArrayBuffer} binData - the raw binary data received
+ * @return {null | Object} returns null if more binary data is expected or
+ *   a reconstructed packet object if all buffers have been received.
+ * @api private
+ */BinaryReconstructor.prototype.takeBinaryData=function(binData){this.buffers.push(binData);if(this.buffers.length==this.reconPack.attachments){ // done with buffer list
+var packet=binary.reconstructPacket(this.reconPack,this.buffers);this.finishedReconstruction();return packet;}return null;}; /**
+ * Cleans up binary packet reconstruction variables.
+ *
+ * @api private
+ */BinaryReconstructor.prototype.finishedReconstruction=function(){this.reconPack=null;this.buffers=[];};function error(data){return {type:exports.ERROR,data:'parser error'};}},{"./binary":46,"./is-buffer":48,"component-emitter":49,"debug":39,"isarray":43,"json3":50}],48:[function(_dereq_,module,exports){(function(global){module.exports=isBuf; /**
+ * Returns true if obj is a buffer or an arraybuffer.
+ *
+ * @api private
+ */function isBuf(obj){return global.Buffer&&global.Buffer.isBuffer(obj)||global.ArrayBuffer&&obj instanceof ArrayBuffer;}}).call(this,typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:{});},{}],49:[function(_dereq_,module,exports){arguments[4][15][0].apply(exports,arguments);},{"dup":15}],50:[function(_dereq_,module,exports){(function(global){ /*! JSON v3.3.2 | http://bestiejs.github.io/json3 | Copyright 2012-2014, Kit Cambridge | http://kit.mit-license.org */;(function(){ // Detect the `define` function exposed by asynchronous module loaders. The
+// strict `define` check is necessary for compatibility with `r.js`.
+var isLoader=typeof define==="function"&&define.amd; // A set of types used to distinguish objects from primitives.
+var objectTypes={"function":true,"object":true}; // Detect the `exports` object exposed by CommonJS implementations.
+var freeExports=objectTypes[typeof exports==="undefined"?"undefined":_typeof(exports)]&&exports&&!exports.nodeType&&exports; // Use the `global` object exposed by Node (including Browserify via
+// `insert-module-globals`), Narwhal, and Ringo as the default context,
+// and the `window` object in browsers. Rhino exports a `global` function
+// instead.
+var root=objectTypes[typeof window==="undefined"?"undefined":_typeof(window)]&&window||this,freeGlobal=freeExports&&objectTypes[typeof module==="undefined"?"undefined":_typeof(module)]&&module&&!module.nodeType&&(typeof global==="undefined"?"undefined":_typeof(global))=="object"&&global;if(freeGlobal&&(freeGlobal["global"]===freeGlobal||freeGlobal["window"]===freeGlobal||freeGlobal["self"]===freeGlobal)){root=freeGlobal;} // Public: Initializes JSON 3 using the given `context` object, attaching the
+// `stringify` and `parse` functions to the specified `exports` object.
+function runInContext(context,exports){context||(context=root["Object"]());exports||(exports=root["Object"]()); // Native constructor aliases.
+var Number=context["Number"]||root["Number"],String=context["String"]||root["String"],Object=context["Object"]||root["Object"],Date=context["Date"]||root["Date"],SyntaxError=context["SyntaxError"]||root["SyntaxError"],TypeError=context["TypeError"]||root["TypeError"],Math=context["Math"]||root["Math"],nativeJSON=context["JSON"]||root["JSON"]; // Delegate to the native `stringify` and `parse` implementations.
+if((typeof nativeJSON==="undefined"?"undefined":_typeof(nativeJSON))=="object"&&nativeJSON){exports.stringify=nativeJSON.stringify;exports.parse=nativeJSON.parse;} // Convenience aliases.
+var objectProto=Object.prototype,getClass=objectProto.toString,_isProperty,_forEach,undef; // Test the `Date#getUTC*` methods. Based on work by @Yaffle.
+var isExtended=new Date(-3509827334573292);try{ // The `getUTCFullYear`, `Month`, and `Date` methods return nonsensical
+// results for certain dates in Opera >= 10.53.
+isExtended=isExtended.getUTCFullYear()==-109252&&isExtended.getUTCMonth()===0&&isExtended.getUTCDate()===1&& // Safari < 2.0.2 stores the internal millisecond time value correctly,
+// but clips the values returned by the date methods to the range of
+// signed 32-bit integers ([-2 ** 31, 2 ** 31 - 1]).
+isExtended.getUTCHours()==10&&isExtended.getUTCMinutes()==37&&isExtended.getUTCSeconds()==6&&isExtended.getUTCMilliseconds()==708;}catch(exception){} // Internal: Determines whether the native `JSON.stringify` and `parse`
+// implementations are spec-compliant. Based on work by Ken Snyder.
+function has(name){if(has[name]!==undef){ // Return cached feature test result.
+return has[name];}var isSupported;if(name=="bug-string-char-index"){ // IE <= 7 doesn't support accessing string characters using square
+// bracket notation. IE 8 only supports this for primitives.
+isSupported="a"[0]!="a";}else if(name=="json"){ // Indicates whether both `JSON.stringify` and `JSON.parse` are
+// supported.
+isSupported=has("json-stringify")&&has("json-parse");}else {var value,serialized="{\"a\":[1,true,false,null,\"\\u0000\\b\\n\\f\\r\\t\"]}"; // Test `JSON.stringify`.
+if(name=="json-stringify"){var stringify=exports.stringify,stringifySupported=typeof stringify=="function"&&isExtended;if(stringifySupported){ // A test function object with a custom `toJSON` method.
+(value=function value(){return 1;}).toJSON=value;try{stringifySupported= // Firefox 3.1b1 and b2 serialize string, number, and boolean
+// primitives as object literals.
+stringify(0)==="0"&& // FF 3.1b1, b2, and JSON 2 serialize wrapped primitives as object
+// literals.
+stringify(new Number())==="0"&&stringify(new String())=='""'&& // FF 3.1b1, 2 throw an error if the value is `null`, `undefined`, or
+// does not define a canonical JSON representation (this applies to
+// objects with `toJSON` properties as well, *unless* they are nested
+// within an object or array).
+stringify(getClass)===undef&& // IE 8 serializes `undefined` as `"undefined"`. Safari <= 5.1.7 and
+// FF 3.1b3 pass this test.
+stringify(undef)===undef&& // Safari <= 5.1.7 and FF 3.1b3 throw `Error`s and `TypeError`s,
+// respectively, if the value is omitted entirely.
+stringify()===undef&& // FF 3.1b1, 2 throw an error if the given value is not a number,
+// string, array, object, Boolean, or `null` literal. This applies to
+// objects with custom `toJSON` methods as well, unless they are nested
+// inside object or array literals. YUI 3.0.0b1 ignores custom `toJSON`
+// methods entirely.
+stringify(value)==="1"&&stringify([value])=="[1]"&& // Prototype <= 1.6.1 serializes `[undefined]` as `"[]"` instead of
+// `"[null]"`.
+stringify([undef])=="[null]"&& // YUI 3.0.0b1 fails to serialize `null` literals.
+stringify(null)=="null"&& // FF 3.1b1, 2 halts serialization if an array contains a function:
+// `[1, true, getClass, 1]` serializes as "[1,true,],". FF 3.1b3
+// elides non-JSON values from objects and arrays, unless they
+// define custom `toJSON` methods.
+stringify([undef,getClass,null])=="[null,null,null]"&& // Simple serialization test. FF 3.1b1 uses Unicode escape sequences
+// where character escape codes are expected (e.g., `\b` => `\u0008`).
+stringify({"a":[value,true,false,null,"\x00\b\n\f\r\t"]})==serialized&& // FF 3.1b1 and b2 ignore the `filter` and `width` arguments.
+stringify(null,value)==="1"&&stringify([1,2],null,1)=="[\n 1,\n 2\n]"&& // JSON 2, Prototype <= 1.7, and older WebKit builds incorrectly
+// serialize extended years.
+stringify(new Date(-8.64e15))=='"-271821-04-20T00:00:00.000Z"'&& // The milliseconds are optional in ES 5, but required in 5.1.
+stringify(new Date(8.64e15))=='"+275760-09-13T00:00:00.000Z"'&& // Firefox <= 11.0 incorrectly serializes years prior to 0 as negative
+// four-digit years instead of six-digit years. Credits: @Yaffle.
+stringify(new Date(-621987552e5))=='"-000001-01-01T00:00:00.000Z"'&& // Safari <= 5.1.5 and Opera >= 10.53 incorrectly serialize millisecond
+// values less than 1000. Credits: @Yaffle.
+stringify(new Date(-1))=='"1969-12-31T23:59:59.999Z"';}catch(exception){stringifySupported=false;}}isSupported=stringifySupported;} // Test `JSON.parse`.
+if(name=="json-parse"){var parse=exports.parse;if(typeof parse=="function"){try{ // FF 3.1b1, b2 will throw an exception if a bare literal is provided.
+// Conforming implementations should also coerce the initial argument to
+// a string prior to parsing.
+if(parse("0")===0&&!parse(false)){ // Simple parsing test.
+value=parse(serialized);var parseSupported=value["a"].length==5&&value["a"][0]===1;if(parseSupported){try{ // Safari <= 5.1.2 and FF 3.1b1 allow unescaped tabs in strings.
+parseSupported=!parse('"\t"');}catch(exception){}if(parseSupported){try{ // FF 4.0 and 4.0.1 allow leading `+` signs and leading
+// decimal points. FF 4.0, 4.0.1, and IE 9-10 also allow
+// certain octal literals.
+parseSupported=parse("01")!==1;}catch(exception){}}if(parseSupported){try{ // FF 4.0, 4.0.1, and Rhino 1.7R3-R4 allow trailing decimal
+// points. These environments, along with FF 3.1b1 and 2,
+// also allow trailing commas in JSON objects and arrays.
+parseSupported=parse("1.")!==1;}catch(exception){}}}}}catch(exception){parseSupported=false;}}isSupported=parseSupported;}}return has[name]=!!isSupported;}if(!has("json")){ // Common `[[Class]]` name aliases.
+var functionClass="[object Function]",dateClass="[object Date]",numberClass="[object Number]",stringClass="[object String]",arrayClass="[object Array]",booleanClass="[object Boolean]"; // Detect incomplete support for accessing string characters by index.
+var charIndexBuggy=has("bug-string-char-index"); // Define additional utility methods if the `Date` methods are buggy.
+if(!isExtended){var floor=Math.floor; // A mapping between the months of the year and the number of days between
+// January 1st and the first of the respective month.
+var Months=[0,31,59,90,120,151,181,212,243,273,304,334]; // Internal: Calculates the number of days between the Unix epoch and the
+// first day of the given month.
+var getDay=function getDay(year,month){return Months[month]+365*(year-1970)+floor((year-1969+(month=+(month>1)))/4)-floor((year-1901+month)/100)+floor((year-1601+month)/400);};} // Internal: Determines if a property is a direct property of the given
+// object. Delegates to the native `Object#hasOwnProperty` method.
+if(!(_isProperty=objectProto.hasOwnProperty)){_isProperty=function isProperty(property){var members={},constructor;if((members.__proto__=null,members.__proto__={ // The *proto* property cannot be set multiple times in recent
+// versions of Firefox and SeaMonkey.
+"toString":1},members).toString!=getClass){ // Safari <= 2.0.3 doesn't implement `Object#hasOwnProperty`, but
+// supports the mutable *proto* property.
+_isProperty=function isProperty(property){ // Capture and break the object's prototype chain (see section 8.6.2
+// of the ES 5.1 spec). The parenthesized expression prevents an
+// unsafe transformation by the Closure Compiler.
+var original=this.__proto__,result=property in (this.__proto__=null,this); // Restore the original prototype chain.
+this.__proto__=original;return result;};}else { // Capture a reference to the top-level `Object` constructor.
+constructor=members.constructor; // Use the `constructor` property to simulate `Object#hasOwnProperty` in
+// other environments.
+_isProperty=function isProperty(property){var parent=(this.constructor||constructor).prototype;return property in this&&!(property in parent&&this[property]===parent[property]);};}members=null;return _isProperty.call(this,property);};} // Internal: Normalizes the `for...in` iteration algorithm across
+// environments. Each enumerated key is yielded to a `callback` function.
+_forEach=function forEach(object,callback){var size=0,Properties,members,property; // Tests for bugs in the current environment's `for...in` algorithm. The
+// `valueOf` property inherits the non-enumerable flag from
+// `Object.prototype` in older versions of IE, Netscape, and Mozilla.
+(Properties=function Properties(){this.valueOf=0;}).prototype.valueOf=0; // Iterate over a new instance of the `Properties` class.
+members=new Properties();for(property in members){ // Ignore all properties inherited from `Object.prototype`.
+if(_isProperty.call(members,property)){size++;}}Properties=members=null; // Normalize the iteration algorithm.
+if(!size){ // A list of non-enumerable properties inherited from `Object.prototype`.
+members=["valueOf","toString","toLocaleString","propertyIsEnumerable","isPrototypeOf","hasOwnProperty","constructor"]; // IE <= 8, Mozilla 1.0, and Netscape 6.2 ignore shadowed non-enumerable
+// properties.
+_forEach=function forEach(object,callback){var isFunction=getClass.call(object)==functionClass,property,length;var hasProperty=!isFunction&&typeof object.constructor!="function"&&objectTypes[_typeof(object.hasOwnProperty)]&&object.hasOwnProperty||_isProperty;for(property in object){ // Gecko <= 1.0 enumerates the `prototype` property of functions under
+// certain conditions; IE does not.
+if(!(isFunction&&property=="prototype")&&hasProperty.call(object,property)){callback(property);}} // Manually invoke the callback for each non-enumerable property.
+for(length=members.length;property=members[--length];hasProperty.call(object,property)&&callback(property)){}};}else if(size==2){ // Safari <= 2.0.4 enumerates shadowed properties twice.
+_forEach=function forEach(object,callback){ // Create a set of iterated properties.
+var members={},isFunction=getClass.call(object)==functionClass,property;for(property in object){ // Store each property name to prevent double enumeration. The
+// `prototype` property of functions is not enumerated due to cross-
+// environment inconsistencies.
+if(!(isFunction&&property=="prototype")&&!_isProperty.call(members,property)&&(members[property]=1)&&_isProperty.call(object,property)){callback(property);}}};}else { // No bugs detected; use the standard `for...in` algorithm.
+_forEach=function forEach(object,callback){var isFunction=getClass.call(object)==functionClass,property,isConstructor;for(property in object){if(!(isFunction&&property=="prototype")&&_isProperty.call(object,property)&&!(isConstructor=property==="constructor")){callback(property);}} // Manually invoke the callback for the `constructor` property due to
+// cross-environment inconsistencies.
+if(isConstructor||_isProperty.call(object,property="constructor")){callback(property);}};}return _forEach(object,callback);}; // Public: Serializes a JavaScript `value` as a JSON string. The optional
+// `filter` argument may specify either a function that alters how object and
+// array members are serialized, or an array of strings and numbers that
+// indicates which properties should be serialized. The optional `width`
+// argument may be either a string or number that specifies the indentation
+// level of the output.
+if(!has("json-stringify")){ // Internal: A map of control characters and their escaped equivalents.
+var Escapes={92:"\\\\",34:'\\"',8:"\\b",12:"\\f",10:"\\n",13:"\\r",9:"\\t"}; // Internal: Converts `value` into a zero-padded string such that its
+// length is at least equal to `width`. The `width` must be <= 6.
+var leadingZeroes="000000";var toPaddedString=function toPaddedString(width,value){ // The `|| 0` expression is necessary to work around a bug in
+// Opera <= 7.54u2 where `0 == -0`, but `String(-0) !== "0"`.
+return (leadingZeroes+(value||0)).slice(-width);}; // Internal: Double-quotes a string `value`, replacing all ASCII control
+// characters (characters with code unit values between 0 and 31) with
+// their escaped equivalents. This is an implementation of the
+// `Quote(value)` operation defined in ES 5.1 section 15.12.3.
+var unicodePrefix="\\u00";var quote=function quote(value){var result='"',index=0,length=value.length,useCharIndex=!charIndexBuggy||length>10;var symbols=useCharIndex&&(charIndexBuggy?value.split(""):value);for(;index<length;index++){var charCode=value.charCodeAt(index); // If the character is a control character, append its Unicode or
+// shorthand escape sequence; otherwise, append the character as-is.
+switch(charCode){case 8:case 9:case 10:case 12:case 13:case 34:case 92:result+=Escapes[charCode];break;default:if(charCode<32){result+=unicodePrefix+toPaddedString(2,charCode.toString(16));break;}result+=useCharIndex?symbols[index]:value.charAt(index);}}return result+'"';}; // Internal: Recursively serializes an object. Implements the
+// `Str(key, holder)`, `JO(value)`, and `JA(value)` operations.
+var serialize=function serialize(property,object,callback,properties,whitespace,indentation,stack){var value,className,year,month,date,time,hours,minutes,seconds,milliseconds,results,element,index,length,prefix,result;try{ // Necessary for host object support.
+value=object[property];}catch(exception){}if((typeof value==="undefined"?"undefined":_typeof(value))=="object"&&value){className=getClass.call(value);if(className==dateClass&&!_isProperty.call(value,"toJSON")){if(value>-1/0&&value<1/0){ // Dates are serialized according to the `Date#toJSON` method
+// specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15
+// for the ISO 8601 date time string format.
+if(getDay){ // Manually compute the year, month, date, hours, minutes,
+// seconds, and milliseconds if the `getUTC*` methods are
+// buggy. Adapted from @Yaffle's `date-shim` project.
+date=floor(value/864e5);for(year=floor(date/365.2425)+1970-1;getDay(year+1,0)<=date;year++){}for(month=floor((date-getDay(year,0))/30.42);getDay(year,month+1)<=date;month++){}date=1+date-getDay(year,month); // The `time` value specifies the time within the day (see ES
+// 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used
+// to compute `A modulo B`, as the `%` operator does not
+// correspond to the `modulo` operation for negative numbers.
+time=(value%864e5+864e5)%864e5; // The hours, minutes, seconds, and milliseconds are obtained by
+// decomposing the time within the day. See section 15.9.1.10.
+hours=floor(time/36e5)%24;minutes=floor(time/6e4)%60;seconds=floor(time/1e3)%60;milliseconds=time%1e3;}else {year=value.getUTCFullYear();month=value.getUTCMonth();date=value.getUTCDate();hours=value.getUTCHours();minutes=value.getUTCMinutes();seconds=value.getUTCSeconds();milliseconds=value.getUTCMilliseconds();} // Serialize extended years correctly.
+value=(year<=0||year>=1e4?(year<0?"-":"+")+toPaddedString(6,year<0?-year:year):toPaddedString(4,year))+"-"+toPaddedString(2,month+1)+"-"+toPaddedString(2,date)+ // Months, dates, hours, minutes, and seconds should have two
+// digits; milliseconds should have three.
+"T"+toPaddedString(2,hours)+":"+toPaddedString(2,minutes)+":"+toPaddedString(2,seconds)+ // Milliseconds are optional in ES 5.0, but required in 5.1.
+"."+toPaddedString(3,milliseconds)+"Z";}else {value=null;}}else if(typeof value.toJSON=="function"&&(className!=numberClass&&className!=stringClass&&className!=arrayClass||_isProperty.call(value,"toJSON"))){ // Prototype <= 1.6.1 adds non-standard `toJSON` methods to the
+// `Number`, `String`, `Date`, and `Array` prototypes. JSON 3
+// ignores all `toJSON` methods on these objects unless they are
+// defined directly on an instance.
+value=value.toJSON(property);}}if(callback){ // If a replacement function was provided, call it to obtain the value
+// for serialization.
+value=callback.call(object,property,value);}if(value===null){return "null";}className=getClass.call(value);if(className==booleanClass){ // Booleans are represented literally.
+return ""+value;}else if(className==numberClass){ // JSON numbers must be finite. `Infinity` and `NaN` are serialized as
+// `"null"`.
+return value>-1/0&&value<1/0?""+value:"null";}else if(className==stringClass){ // Strings are double-quoted and escaped.
+return quote(""+value);} // Recursively serialize objects and arrays.
+if((typeof value==="undefined"?"undefined":_typeof(value))=="object"){ // Check for cyclic structures. This is a linear search; performance
+// is inversely proportional to the number of unique nested objects.
+for(length=stack.length;length--;){if(stack[length]===value){ // Cyclic structures cannot be serialized by `JSON.stringify`.
+throw TypeError();}} // Add the object to the stack of traversed objects.
+stack.push(value);results=[]; // Save the current indentation level and indent one additional level.
+prefix=indentation;indentation+=whitespace;if(className==arrayClass){ // Recursively serialize array elements.
+for(index=0,length=value.length;index<length;index++){element=serialize(index,value,callback,properties,whitespace,indentation,stack);results.push(element===undef?"null":element);}result=results.length?whitespace?"[\n"+indentation+results.join(",\n"+indentation)+"\n"+prefix+"]":"["+results.join(",")+"]":"[]";}else { // Recursively serialize object members. Members are selected from
+// either a user-specified list of property names, or the object
+// itself.
+_forEach(properties||value,function(property){var element=serialize(property,value,callback,properties,whitespace,indentation,stack);if(element!==undef){ // According to ES 5.1 section 15.12.3: "If `gap` {whitespace}
+// is not the empty string, let `member` {quote(property) + ":"}
+// be the concatenation of `member` and the `space` character."
+// The "`space` character" refers to the literal space
+// character, not the `space` {width} argument provided to
+// `JSON.stringify`.
+results.push(quote(property)+":"+(whitespace?" ":"")+element);}});result=results.length?whitespace?"{\n"+indentation+results.join(",\n"+indentation)+"\n"+prefix+"}":"{"+results.join(",")+"}":"{}";} // Remove the object from the traversed object stack.
+stack.pop();return result;}}; // Public: `JSON.stringify`. See ES 5.1 section 15.12.3.
+exports.stringify=function(source,filter,width){var whitespace,callback,properties,className;if(objectTypes[typeof filter==="undefined"?"undefined":_typeof(filter)]&&filter){if((className=getClass.call(filter))==functionClass){callback=filter;}else if(className==arrayClass){ // Convert the property names array into a makeshift set.
+properties={};for(var index=0,length=filter.length,value;index<length;value=filter[index++],(className=getClass.call(value),className==stringClass||className==numberClass)&&(properties[value]=1)){}}}if(width){if((className=getClass.call(width))==numberClass){ // Convert the `width` to an integer and create a string containing
+// `width` number of space characters.
+if((width-=width%1)>0){for(whitespace="",width>10&&(width=10);whitespace.length<width;whitespace+=" "){}}}else if(className==stringClass){whitespace=width.length<=10?width:width.slice(0,10);}} // Opera <= 7.54u2 discards the values associated with empty string keys
+// (`""`) only if they are used directly within an object member list
+// (e.g., `!("" in { "": 1})`).
+return serialize("",(value={},value[""]=source,value),callback,properties,whitespace,"",[]);};} // Public: Parses a JSON source string.
+if(!has("json-parse")){var fromCharCode=String.fromCharCode; // Internal: A map of escaped control characters and their unescaped
+// equivalents.
+var Unescapes={92:"\\",34:'"',47:"/",98:"\b",116:"\t",110:"\n",102:"\f",114:"\r"}; // Internal: Stores the parser state.
+var Index,Source; // Internal: Resets the parser state and throws a `SyntaxError`.
+var abort=function abort(){Index=Source=null;throw SyntaxError();}; // Internal: Returns the next token, or `"$"` if the parser has reached
+// the end of the source string. A token may be a string, number, `null`
+// literal, or Boolean literal.
+var lex=function lex(){var source=Source,length=source.length,value,begin,position,isSigned,charCode;while(Index<length){charCode=source.charCodeAt(Index);switch(charCode){case 9:case 10:case 13:case 32: // Skip whitespace tokens, including tabs, carriage returns, line
+// feeds, and space characters.
+Index++;break;case 123:case 125:case 91:case 93:case 58:case 44: // Parse a punctuator token (`{`, `}`, `[`, `]`, `:`, or `,`) at
+// the current position.
+value=charIndexBuggy?source.charAt(Index):source[Index];Index++;return value;case 34: // `"` delimits a JSON string; advance to the next character and
+// begin parsing the string. String tokens are prefixed with the
+// sentinel `@` character to distinguish them from punctuators and
+// end-of-string tokens.
+for(value="@",Index++;Index<length;){charCode=source.charCodeAt(Index);if(charCode<32){ // Unescaped ASCII control characters (those with a code unit
+// less than the space character) are not permitted.
+abort();}else if(charCode==92){ // A reverse solidus (`\`) marks the beginning of an escaped
+// control character (including `"`, `\`, and `/`) or Unicode
+// escape sequence.
+charCode=source.charCodeAt(++Index);switch(charCode){case 92:case 34:case 47:case 98:case 116:case 110:case 102:case 114: // Revive escaped control characters.
+value+=Unescapes[charCode];Index++;break;case 117: // `\u` marks the beginning of a Unicode escape sequence.
+// Advance to the first character and validate the
+// four-digit code point.
+begin=++Index;for(position=Index+4;Index<position;Index++){charCode=source.charCodeAt(Index); // A valid sequence comprises four hexdigits (case-
+// insensitive) that form a single hexadecimal value.
+if(!(charCode>=48&&charCode<=57||charCode>=97&&charCode<=102||charCode>=65&&charCode<=70)){ // Invalid Unicode escape sequence.
+abort();}} // Revive the escaped character.
+value+=fromCharCode("0x"+source.slice(begin,Index));break;default: // Invalid escape sequence.
+abort();}}else {if(charCode==34){ // An unescaped double-quote character marks the end of the
+// string.
+break;}charCode=source.charCodeAt(Index);begin=Index; // Optimize for the common case where a string is valid.
+while(charCode>=32&&charCode!=92&&charCode!=34){charCode=source.charCodeAt(++Index);} // Append the string as-is.
+value+=source.slice(begin,Index);}}if(source.charCodeAt(Index)==34){ // Advance to the next character and return the revived string.
+Index++;return value;} // Unterminated string.
+abort();default: // Parse numbers and literals.
+begin=Index; // Advance past the negative sign, if one is specified.
+if(charCode==45){isSigned=true;charCode=source.charCodeAt(++Index);} // Parse an integer or floating-point value.
+if(charCode>=48&&charCode<=57){ // Leading zeroes are interpreted as octal literals.
+if(charCode==48&&(charCode=source.charCodeAt(Index+1),charCode>=48&&charCode<=57)){ // Illegal octal literal.
+abort();}isSigned=false; // Parse the integer component.
+for(;Index<length&&(charCode=source.charCodeAt(Index),charCode>=48&&charCode<=57);Index++){} // Floats cannot contain a leading decimal point; however, this
+// case is already accounted for by the parser.
+if(source.charCodeAt(Index)==46){position=++Index; // Parse the decimal component.
+for(;position<length&&(charCode=source.charCodeAt(position),charCode>=48&&charCode<=57);position++){}if(position==Index){ // Illegal trailing decimal.
+abort();}Index=position;} // Parse exponents. The `e` denoting the exponent is
+// case-insensitive.
+charCode=source.charCodeAt(Index);if(charCode==101||charCode==69){charCode=source.charCodeAt(++Index); // Skip past the sign following the exponent, if one is
+// specified.
+if(charCode==43||charCode==45){Index++;} // Parse the exponential component.
+for(position=Index;position<length&&(charCode=source.charCodeAt(position),charCode>=48&&charCode<=57);position++){}if(position==Index){ // Illegal empty exponent.
+abort();}Index=position;} // Coerce the parsed value to a JavaScript number.
+return +source.slice(begin,Index);} // A negative sign may only precede numbers.
+if(isSigned){abort();} // `true`, `false`, and `null` literals.
+if(source.slice(Index,Index+4)=="true"){Index+=4;return true;}else if(source.slice(Index,Index+5)=="false"){Index+=5;return false;}else if(source.slice(Index,Index+4)=="null"){Index+=4;return null;} // Unrecognized token.
+abort();}} // Return the sentinel `$` character if the parser has reached the end
+// of the source string.
+return "$";}; // Internal: Parses a JSON `value` token.
+var get=function get(value){var results,hasMembers;if(value=="$"){ // Unexpected end of input.
+abort();}if(typeof value=="string"){if((charIndexBuggy?value.charAt(0):value[0])=="@"){ // Remove the sentinel `@` character.
+return value.slice(1);} // Parse object and array literals.
+if(value=="["){ // Parses a JSON array, returning a new JavaScript array.
+results=[];for(;;hasMembers||(hasMembers=true)){value=lex(); // A closing square bracket marks the end of the array literal.
+if(value=="]"){break;} // If the array literal contains elements, the current token
+// should be a comma separating the previous element from the
+// next.
+if(hasMembers){if(value==","){value=lex();if(value=="]"){ // Unexpected trailing `,` in array literal.
+abort();}}else { // A `,` must separate each array element.
+abort();}} // Elisions and leading commas are not permitted.
+if(value==","){abort();}results.push(get(value));}return results;}else if(value=="{"){ // Parses a JSON object, returning a new JavaScript object.
+results={};for(;;hasMembers||(hasMembers=true)){value=lex(); // A closing curly brace marks the end of the object literal.
+if(value=="}"){break;} // If the object literal contains members, the current token
+// should be a comma separator.
+if(hasMembers){if(value==","){value=lex();if(value=="}"){ // Unexpected trailing `,` in object literal.
+abort();}}else { // A `,` must separate each object member.
+abort();}} // Leading commas are not permitted, object property names must be
+// double-quoted strings, and a `:` must separate each property
+// name and value.
+if(value==","||typeof value!="string"||(charIndexBuggy?value.charAt(0):value[0])!="@"||lex()!=":"){abort();}results[value.slice(1)]=get(lex());}return results;} // Unexpected token encountered.
+abort();}return value;}; // Internal: Updates a traversed object member.
+var update=function update(source,property,callback){var element=walk(source,property,callback);if(element===undef){delete source[property];}else {source[property]=element;}}; // Internal: Recursively traverses a parsed JSON object, invoking the
+// `callback` function for each value. This is an implementation of the
+// `Walk(holder, name)` operation defined in ES 5.1 section 15.12.2.
+var walk=function walk(source,property,callback){var value=source[property],length;if((typeof value==="undefined"?"undefined":_typeof(value))=="object"&&value){ // `forEach` can't be used to traverse an array in Opera <= 8.54
+// because its `Object#hasOwnProperty` implementation returns `false`
+// for array indices (e.g., `![1, 2, 3].hasOwnProperty("0")`).
+if(getClass.call(value)==arrayClass){for(length=value.length;length--;){update(value,length,callback);}}else {_forEach(value,function(property){update(value,property,callback);});}}return callback.call(source,property,value);}; // Public: `JSON.parse`. See ES 5.1 section 15.12.2.
+exports.parse=function(source,callback){var result,value;Index=0;Source=""+source;result=get(lex()); // If a JSON string contains multiple tokens, it is invalid.
+if(lex()!="$"){abort();} // Reset the parser state.
+Index=Source=null;return callback&&getClass.call(callback)==functionClass?walk((value={},value[""]=result,value),"",callback):result;};}}exports["runInContext"]=runInContext;return exports;}if(freeExports&&!isLoader){ // Export for CommonJS environments.
+runInContext(root,freeExports);}else { // Export for web browsers and JavaScript engines.
+var nativeJSON=root.JSON,previousJSON=root["JSON3"],isRestored=false;var JSON3=runInContext(root,root["JSON3"]={ // Public: Restores the original value of the global `JSON` object and
+// returns a reference to the `JSON3` object.
+"noConflict":function noConflict(){if(!isRestored){isRestored=true;root.JSON=nativeJSON;root["JSON3"]=previousJSON;nativeJSON=previousJSON=null;}return JSON3;}});root.JSON={"parse":JSON3.parse,"stringify":JSON3.stringify};} // Export for asynchronous module loaders.
+if(isLoader){define(function(){return JSON3;});}}).call(this);}).call(this,typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:{});},{}],51:[function(_dereq_,module,exports){module.exports=toArray;function toArray(list,index){var array=[];index=index||0;for(var i=index||0;i<list.length;i++){array[i-index]=list[i];}return array;}},{}]},{},[31])(31);});
\ No newline at end of file
diff --git a/dist/client/preview/components/Preview.js b/dist/client/preview/components/Preview.js
index b616eb3..749744b 100644
--- a/dist/client/preview/components/Preview.js
+++ b/dist/client/preview/components/Preview.js
@@ -46,9 +46,13 @@ var Preview = function (_Component) {
     value: function componentDidMount() {
       var _this2 = this;
 
-      // this fixes the window.navigator.userAgent issue
-      // TODO: find out why it's working when set this way
-      var io = require('socket.io-client/socket.io');
+      // TODO use an official release of socket.io-client instead
+      // used a patched socket-io client until following happens
+      // - engine.io-parser releases a new version after this pull-request
+      //   https://github.com/socketio/engine.io-parser/pull/55
+      // - socket.io-client uses the patched engine.io-parser and releases
+      //   https://github.com/socketio/socket.io-client/issues/945
+      var io = require('../../_vendor/patched-socket.io.js');
 
       // new connection
       this.socket = io(this.props.address, { jsonp: false });
diff --git a/src/client/preview/components/patched-socket.io.js b/src/client/_vendor/patched-socket.io.js
similarity index 99%
rename from src/client/preview/components/patched-socket.io.js
rename to src/client/_vendor/patched-socket.io.js
index dc31ae6..0f69a36 100644
--- a/src/client/preview/components/patched-socket.io.js
+++ b/src/client/_vendor/patched-socket.io.js
@@ -1104,7 +1104,7 @@ JSONPPolling.prototype.doPoll = function () {
   }
   this.script = script;
 
-  var isUAgecko = 'undefined' != typeof navigator && /gecko/i.test(navigator.userAgent);
+  var isUAgecko = 'undefined' != typeof navigator && 'undefined' != typeof navigator.userAgent && /gecko/i.test(navigator.userAgent);
 
   if (isUAgecko) {
     setTimeout(function () {
@@ -2015,6 +2015,7 @@ WS.prototype.addEventListeners = function(){
  */
 
 if ('undefined' != typeof navigator
+  && 'undefined' != typeof navigator.userAgent
   && /iPad|iPhone|iPod/i.test(navigator.userAgent)) {
   WS.prototype.onData = function(data){
     var self = this;
@@ -2640,7 +2641,7 @@ function useColors() {
     (window.console && (console.firebug || (console.exception && console.table))) ||
     // is firefox >= v31?
     // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
-    (navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31);
+    ('undefined' != typeof navigator && 'undefined' != typeof navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31);
 }
 
 /**
@@ -2982,7 +2983,7 @@ var utf8 = _dereq_('utf8');
  * http://ghinda.net/jpeg-blob-ajax-android/
  */
 
-var isAndroid = navigator.userAgent.match(/Android/i);
+var isAndroid = 'undefined' != typeof navigator && 'undefined' != typeof navigator.userAgent && navigator.userAgent.match(/Android/i);
 
 /**
  * Check if we are running in PhantomJS.
@@ -2990,7 +2991,7 @@ var isAndroid = navigator.userAgent.match(/Android/i);
  * https://github.com/ariya/phantomjs/issues/11395
  * @type boolean
  */
-var isPhantomJS = /PhantomJS/i.test(navigator.userAgent);
+var isPhantomJS = 'undefined' != typeof navigator && 'undefined' != typeof navigator.userAgent && /PhantomJS/i.test(navigator.userAgent);
 
 /**
  * When true, avoids using Blobs to encode payloads.
diff --git a/src/client/preview/components/Preview.js b/src/client/preview/components/Preview.js
index 814363f..dbfa3d3 100644
--- a/src/client/preview/components/Preview.js
+++ b/src/client/preview/components/Preview.js
@@ -14,9 +14,13 @@ export default class Preview extends Component {
   }
 
   componentDidMount() {
-    // this fixes the window.navigator.userAgent issue
-    // TODO: find out why it's working when set this way
-    const io = require('socket.io-client/socket.io');
+    // TODO use an official release of socket.io-client instead
+    // used a patched socket-io client until following happens
+    // - engine.io-parser releases a new version after this pull-request
+    //   https://github.com/socketio/engine.io-parser/pull/55
+    // - socket.io-client uses the patched engine.io-parser and releases
+    //   https://github.com/socketio/socket.io-client/issues/945
+    const io = require('../../_vendor/patched-socket.io.js');
 
     // new connection
     this.socket = io(this.props.address, {jsonp: false});