app.js

// [~/Documents/code/node/myapp](master)$ ./bin/node -v
// => v0.2.1
// [~/Documents/code/node/myapp](master)$ ./bin/express -v
// => 1.0.0rc4

/**
 * Module dependencies.
 */

require.paths.unshift(__dirname + '/lib/node');
var express = require('express');
var less = require('less');
var mylib = require('mylib');
var rStore = require('connect-redis');
var io = require('socket.io-node');
var app = module.exports = express.createServer();
var csrf = require('./path/to/express-csrf/csrf.js');

// Dynamic Helpers
app.dynamicHelpers({
	csrf: csrf.token;
});

app.dynamicHelpers({
    current_user: function(req) {
        return req.session.user;
    }
});

// Configuration

app.configure(function(){
    app.set('views', __dirname + '/views');
    app.use(express.logger());
    app.set('view engine', 'jade');
    app.use(express.bodyDecoder());
    app.use(express.cookieDecoder());
    app.use(express.session({ store: new rStore }));
    // if u plan to use express-csrf
    app.use(csrf.check());
    app.use(app.router);
    app.use(express.methodOverride());
    app.use(express.compiler({ src: __dirname + '/public', enable: ['less'] }));
    app.use(express.staticProvider(__dirname + '/public'));
});

app.configure('development', function() {
    app.use(express.errorHandler({ dumpExceptions: true, showStack: true })); 
});

app.configure('production', function() {
    app.use(express.errorHandler()); 
});

// Routes

app.get('/', function(req, res) {
    if (!current_user) {
        res.render('index', {
            locals: {
                title: 'Home',
                viewport: 'width=device-width, initial-scale=1.0',
                http_equiv: 'IE=edge,chrome=1'
            }
        });
    } else {
        res.redirect('/success');
    }
});

// Only listen on $ node app.js

if (!module.parent) {
    app.listen(3000);
    console.log("Express server listening on port %d", app.address().port)
}

// Socket.IO

var socket = io.listen(app);
socket.on('connection', function(client) {
    var session_data = client.listener.server.dynamicViewHelpers;
//  var c_user = session_data.current_user();
    var c_user = session_data.current_user;
    var c_user_email = session_data.current_user.email;
    console.log(c_user);
});