app.js

/**
 * Module dependencies.
 */

var express = require('express')
  , routes = require('./routes')
  , user = require('./routes/user')
  , http = require('http')
  , path = require('path')
  , io = require('socket.io');

var app = express()
  , server = require('http').createServer(app)
  , io = io.listen(server);

// all environments
app.set('port', process.env.PORT || 3000);
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));

// development only
if ('development' == app.get('env')) {
  app.use(express.errorHandler());
}

server.listen(app.get('port'))
 
io.sockets.on('connection', function(socket) {
  socket.on('message:sendWithColor', function(data) {
    io.sockets.emit('message:receiveWithColor', { message: data.message });
  });
});