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index.js
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index.js
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var udp = require('./lib/udp'),
web = require('./lib/web'),
config = require('./config.json'),
Redis = require('redis'),
argv = require('optimist').argv;
var qs = require('querystring');
var geotrigger = require('./lib/geotrigger-helper');
var redis = require('./lib/redis');
var stats = require('./lib/stats');
var Terraformer = require('Terraformer');
var geo = require('./lib/geo');
var debug = require('./lib/debug');
var redis_pool = {};
function start_game_listener(game_id, udp_server) {
debug('udp', "Starting new game listener for game:"+game_id);
var redis_sub = Redis.createClient(config.redis_port, config.redis_host);
redis_sub.subscribe("game:"+game_id, function(err,data){
redis_sub.on("message", function(channel, message){
debug('udp', "game:"+game_id, message);
// Find all active players of this game
redis.game.get_players(game_id, function(err, teams){
debug('udp', "Active Players");
debug('udp', teams);
var players = [];
teams.red.forEach(function(p){
players.push(p);
});
teams.blue.forEach(function(p){
players.push(p);
});
players.forEach(function(device_id){
// Look up the UDP info for each player and send the payload to them
redis.device.get_udp_info(device_id, function(err, udp_info){
if(err || udp_info == null){
} else {
stats.udp_out(1);
udp_server.send(new Buffer(message), 0, message.length, udp_info.port, udp_info.address, function (err, data) {
if (err) {
debug('udp', "ERROR: " + err);
} else {
debug('udp', "payload sent to "+udp_info.address+":"+udp_info.port);
}
});
}
});
});
});
});
});
return true;
}
if(argv.udp) {
// create the UDP socket and respond
udp.createSocket(argv.udp, function (err, server) {
debug('udp', "listening on UDP port " + config.udp_port);
server.on("message", function (msg, rinfo) {
try {
var request;
try {
request = JSON.parse(msg);
} catch(e) {
debug('udp', ""+msg);
throw "Error parsing JSON!";
}
debug('udp', "Got UDP Packet");
debug('udp', request);
if (typeof request !== 'object'
|| typeof request.access_token !== 'string'
) {
debug('udp', "Invalid Packet from " + rinfo.host);
return;
}
var accuracy = parseInt(request.accuracy);
if(accuracy <= 30) {
// Force semi-accurate locations to a 5m accuracy to hopefully force the triggers to run
accuracy = 5;
}
var locationUpdate = {
locations: [
{
timestamp: parseInt(request.timestamp),
latitude: parseFloat(request.latitude),
longitude: parseFloat(request.longitude),
accuracy: accuracy,
speed: parseInt(request.speed),
bearing: parseInt(request.bearing)
}
]
};
geotrigger.new_session(request.access_token, null, function(session){
if(!session) {
return;
}
try {
debug('udp', "server got: a message from " + rinfo.address + ":" + rinfo.port + " [" + request.latitude + "," + request.longitude + "]");
stats.udp_in(1);
// Update the UDP address/port in redis for this user
session.set_udp_info(rinfo.address, rinfo.port);
var previous_location;
session.redis.device.get_location(session.device_id, function(err, previous){
var send_to_geotrigger = false;
var distance = false;
if(previous) {
locationUpdate.previous = {
timestamp: parseInt(previous.timestamp),
latitude: parseFloat(previous.latitude),
longitude: parseFloat(previous.longitude),
accuracy: parseInt(previous.accuracy),
speed: parseInt(previous.speed),
bearing: parseInt(previous.bearing)
};
var p1 = new Terraformer.Point([locationUpdate.previous.longitude, locationUpdate.previous.latitude]);
var p2 = new Terraformer.Point([locationUpdate.locations[0].longitude, locationUpdate.locations[0].latitude]);
if((distance=geo.gc_distance(p1, p2)) >= 10) {
send_to_geotrigger = true;
}
} else {
send_to_geotrigger = true;
}
if(send_to_geotrigger) {
debug('udp', "Sending location update! (distance was "+distance+")");
// Send location update to the Geotrigger API
session.send_location_update(locationUpdate, function (err, res) {
if (err) {
debug('udp', "ERROR: " + err);
} else {
debug('udp', res);
}
});
// Store the location of the player in redis
session.redis.device.set_location(session.device_id, {
timestamp: parseInt(request.timestamp),
latitude: parseFloat(request.latitude),
longitude: parseFloat(request.longitude),
speed: parseInt(request.speed),
bearing: parseInt(request.bearing),
accuracy: accuracy
}, function(err,data){});
} else {
debug('udp', "Not sending location update (distance was "+distance+")");
}
});
// Find the active game_id for the user (also includes device name, team and score)
session.redis.device.get_active_game(session.device_id, function(err, game){
if(err) {
debug('udp', "Couldn't find active game for device: " + device_id);
} else {
// Make sure there is already a Redis listener active for this game, and if not, start one
if(redis_pool[game.game_id]) {
} else {
redis_pool[game.game_id] = start_game_listener(game.game_id, server);
}
// Publish this user's location data to the redis channel for the game ID
session.redis.publish_location(session.device_id, game.game_id, {
name: (game.device_name || session.device_id.substring(0,3)),
team: game.device_team,
score: (game.device_score | 0),
latitude: parseFloat(request.latitude),
longitude: parseFloat(request.longitude),
timestamp: parseInt(request.timestamp),
speed: parseInt(request.speed),
bearing: parseInt(request.bearing),
accuracy: accuracy
});
}
});
} catch(e) {
debug('udp', "Error");
debug('udp', e);
}
});
} catch(e) {
debug('udp', "Exception");
debug('udp', e);
}
});
});
}
if(argv.http) {
// create the HTTP server and respond
web.createWebServer(argv.http, function (err, server) {
console.log("listening on TCP port " + argv.http);
server.on("request", function (request, response) {
console.log("http request: " + request.url);
if (request.method === 'POST') {
var body = '';
request.on('data', function (data) {
body += data;
if(body.length > 200000) { // Limit requests to 200kb
response.writeHead(413, { "Content-Type": "application/json" });
response.end(JSON.stringify({"error":"request_too_large"}));
}
});
request.on('end', function () {
request.query = qs.parse(body);
request.body = body;
processRequest(request, response);
});
} else {
processRequest(request, response);
}
});
});
}
function processRequest(request, response) {
var log_request = false;
if (request.url === "/ping") {
require('./lib/routes/ping')(request, response);
} else if (request.url === "/device/register") {
require('./lib/routes/device_register')(request, response);
} else if (request.url === "/device/register_push") {
require('./lib/routes/device_register_push')(request, response);
} else if (request.url === "/device/info") {
// Returns the device ID given an access token. For debugging purposes.
require('./lib/routes/device')(request, response);
} else if (request.url === "/board/list" || request.url === "/boards") {
require('./lib/routes/boards')(request, response);
} else if (request.url === "/board/new") {
require('./lib/routes/board_new')(request, response);
} else if (request.url === "/board/state") {
require('./lib/routes/board_state')(request, response);
// } else if (request.url === "/board/unpublish") {
// require('./lib/routes/board_unpublish')(request, response);
} else if (request.url === "/game/list") {
require('./lib/routes/games')(request, response);
} else if (request.url === "/game/create") {
require('./lib/routes/game_create')(request, response);
} else if (request.url === "/game/start") {
require('./lib/routes/game_start')(request, response);
} else if (request.url === "/game/join") {
require('./lib/routes/game_join')(request, response);
} else if (request.url === "/game/state") {
require('./lib/routes/game_state')(request, response);
log_request = true;
} else if (request.url === "/game/end") {
require('./lib/routes/game_end')(request, response);
} else if (request.url === "/trigger/callback") {
require('./lib/routes/trigger_callback')(request, response);
log_request = true;
} else if (match=request.url.match(/\/(user|avatar)\/(.+)\.jpg/)) {
// Return a user's avatar given their device_id
require('./lib/routes/device_avatar')(match[2], request, response);
} else if (request.url === "/munin/config") {
require('./lib/stats.js').munin_config(request, response);
} else if (request.url === "/munin/stats") {
require('./lib/stats.js').munin_stats(request, response);
} else {
response.writeHead(404, { 'Content-Type': 'text/plain' });
response.end("not found");
}
if(log_request) {
stats.http_incr(request.url);
}
}
/*
*/
if(argv.socketio) {
console.log("listening on socket.io port " + argv.socketio);
var io = require('socket.io').listen(argv.socketio);
io.enable('browser client minification'); // send minified client
io.enable('browser client etag'); // apply etag caching logic based on version number
io.enable('browser client gzip'); // gzip the file
io.sockets.on('connection', function (socket) {
var redis_sub = Redis.createClient(config.redis_port, config.redis_host);
stats.socketio_clients_incr();
// Prompt the client for a game ID
socket.emit('game_id');
// When a game ID is received, subscribe to the corresponding redis channel
socket.on('game_id', function(game_id){
redis_sub.subscribe("game:"+game_id, function(err,data){
redis_sub.on("message", function(channel, message){
debug('socketio', "game:"+game_id, message);
// Send the message from redis to the socket.io client
socket.emit('data', message);
stats.socketio_out(1);
});
});
// Clean up connections
socket.on('disconnect', function(){
stats.socketio_clients_decr();
if(redis_sub) {
redis_sub.unsubscribe();
redis_sub.end();
}
});
socket.on('end', function(){
if(redis_sub) {
redis_sub.unsubscribe();
redis_sub.end();
}
});
});
});
}