app.js

/**
 * Module dependencies.
 */

var express = require('express');
var routes = require('./routes');
var settings = require('./settings');
var MongoStore = require('connect-mongo');

var app = module.exports = express.createServer();

// Configuration

app.configure(function(){
  app.set('views', __dirname + '/views');
  app.set('view engine', 'ejs');
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(express.cookieParser());
  app.use(express.session({
    secret: settings.cookieSecret,
    store: new MongoStore({
      db: settings.db
    })
  }));
  app.use(express.router(routes));
  app.use(express.static(__dirname + '/public'));
});

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

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

app.dynamicHelpers({
  user: function(req, res) {
    return req.session.user;
  },
  error: function(req, res) {
    var err = req.flash('error');
    if (err.length)
      return err;
    else
      return null;
  },
  success: function(req, res) {
    var succ = req.flash('success');
    if (succ.length)
      return succ;
    else
      return null;
  },
});

app.listen(3000);
console.log("Express server listening on port %d in %s mode", app.address().port, app.settings.env);