app.js

/**
 * Module dependencies.
 */

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

var app = express();

// 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());
}

app.get('/', routes.index);
app.get('/nojs', routes.nojs);
app.get('/users', user.list);

var server = http.createServer(app).listen(app.get('port'), function(){
  console.log('Express server listening on port ' + app.get('port'));
});


// Подключаем модуль
var io = require('socket.io').listen(server);

// assuming io is the Socket.IO server object
io.configure(function () { 
	io.set("transports", ["xhr-polling"]); 
	io.set("polling duration", 10); 
	// Отключаем вывод полного лога - пригодится в production'е
	io.set('log level', 1);
});

// Навешиваем обработчик на подключение нового клиента
io.sockets.on('connection', function (socket) {
    var ID = socket.id;
    var time = (new Date).toLocaleTimeString();
    socket.emit('connect', {'event': 'connect', 'name': ID, 'time': time});

    socket.on('disconnect', function() {
        var time = (new Date).toLocaleTimeString();
        socket.broadcast.emit('userSplit', {'event':"userDisconnected", 'name': ID, 'time': time});
    });

});