Upgraded Hackathon Starter to Express 4

app.js

@@ -3,7 +3,17 @@
  */
 
 var express = require('express');
-var MongoStore = require('connect-mongo')(express);
+var cookieParser = require('cookie-parser');
+var compress = require('compression');
+var session = require('express-session');
+var bodyParser = require('body-parser');
+var favicon = require('static-favicon');
+var logger = require('morgan');
+var errorHandler = require('errorhandler');
+var csrf = require('csurf');
+var methodOverride = require('method-override');
+
+var MongoStore = require('connect-mongo')({ session: session });
 var flash = require('express-flash');
 var path = require('path');
 var mongoose = require('mongoose');
@@ -57,21 +67,22 @@ app.use(connectAssets({
   paths: ['public/css', 'public/js'],
   helperContext: app.locals
 }));
-app.use(express.compress());
-app.use(express.logger('dev'));
-app.use(express.cookieParser());
-app.use(express.json());
-app.use(express.urlencoded());
+app.use(compress());
+app.use(favicon());
+app.use(logger('dev'));
+app.use(bodyParser.json());
+app.use(bodyParser.urlencoded());
 app.use(expressValidator());
-app.use(express.methodOverride());
-app.use(express.session({
+app.use(methodOverride());
+app.use(cookieParser());
+app.use(session({
   secret: secrets.sessionSecret,
   store: new MongoStore({
     url: secrets.db,
     auto_reconnect: true
   })
 }));
-app.use(express.csrf());
+app.use(csrf());
 app.use(passport.initialize());
 app.use(passport.session());
 app.use(function(req, res, next) {
@@ -90,12 +101,6 @@ app.use(function(req, res, next) {
   req.session.returnTo = req.path;
   next();
 });
-app.use(app.router);
-app.use(function(req, res) {
-  res.status(404);
-  res.render('404');
-});
-app.use(express.errorHandler());
 
 /**
  * Application routes.
@@ -182,6 +187,16 @@ app.get('/auth/venmo/callback', passport.authorize('venmo', { failureRedirect: '
   res.redirect('/api/venmo');
 });
 
+
+// 404 error handler
+app.use(function(req, res) {
+  res.status(404);
+  res.render('404');
+});
+
+// 500 error handler
+app.use(errorHandler());
+
 /**
  * Start Express server.
  */