test.js.bak

'use strict';
 
//Node application
//var 
  //http = require( 'http' ),
  //express = require( 'express' ),
  //app = express(),
  //url = require('url'),
  //io = require('socket.io'),

  //server = http.createServer( app );
  
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);

var PythonShell = require('python-shell');



http.listen(3000, function(){
  console.log('Express server listening on port %d in %s mode',http.address().port, app.settings.env);
});


var sessionsConnections = {};


//Express Middleware
var 
  morgan = require('morgan'),
  bodyParser = require('body-parser'),
  methodOverride = require('method-override');
  

  app.use(morgan('combined'));
  app.use(bodyParser.json());
  app.use(methodOverride('X-HTTP-Method-Override'));

  /*
  morgan('combined',{
  	skip: function(req,res) {return res.statusCode < 400} 
  });
*/

  
  app.get( '/', function ( request, response ) {
  	response.send( 'Hello World from Node with Express and nodemon!' );
});

//test.html
  app.get('/test.html', function (request, response){
    var options = {
    	root: __dirname,// + '/public/',
    	dotfiles: 'deny',
    	headers: {
        	'x-timestamp': Date.now(),
        	'x-sent': true
    	}
  };	

    var fileName = '/test.html';
    
   response.sendFile(fileName, options, function (err) {
     if(err) {
    	if (err.code === "ECONNABORT" && response.statusCode == 304) {
      		// No problem, 304 means client cache hit, so no data sent
      		console.log('304 cache hit for ' + fileName);
      		return;
    	}
    console.error("SendFile error:", err, " (status: " + err.status + ")");
    
	if (err.status) {
	      response.status(err.status).end();
    	}
  }
  else {
    console.log('Sent:', fileName);
  }
  });

});



//Socket.IO and python-shell
io.on('connection', function(socket){
  

    sessionsConnections[socket.handshake.sessionID] = socket;
    
    console.log('connected to client\n')
    
    socket.on('text', function(msg){

      var pyshell = new PythonShell('parse_pos.py');
      
      console.log('message recieved ' + msg);
      
      //Python NLTK
      // sends the client input to the Python script via stdin 
      pyshell.send(msg);
     
      pyshell.on('message', function (message) {
    
      // received a message sent from the Python script (a simple "print" statement) 
      console.log('response from python script', message);
      
     //send python output to client
      socket.emit('response', message);
      console.log('message emitted ' + message);

      // end the input stream and allow the process to exit 
      pyshell.end(function (err) {
        if (err) throw err;
        console.log('finished'); }); 

    });
  });
});