config.js

module.exports = function(express, app){
	var mongoose = require('mongoose');
	var MongoStore = require('connect-mongo')(express);//save session in mongodb
	var partials = require('express-partials');//layout use
	var flash = require('connect-flash');//error show

//connect mongodb
	var DB_URL = "mongodb://localhost:27017/zsblog";
	mongoose.connect(DB_URL);


	app.configure(function(){
		app.set('port', process.env.port || 3000);
		app.set('views', __dirname + '/views');
		app.set('view engine', 'ejs');
		app.engine('ejs', require('ejs').__express);

		app.use(partials());
		app.use(flash());

		app.use(express.favicon());
		// app.use(express.bodyParser({
		//  	 keepExtensions: true,
		//  	 uploadDir: __dirname+'/public/img'
		//  }));//upload file path
		app.use(express.compress());
	  	app.use(express.bodyParser());
		app.use(express.methodOverride());
		app.use(express.cookieParser());
		app.use(express.session({ 
			store: new MongoStore({ url: DB_URL }), 
			secret: 'mysecret',
			cookie: { maxAge: 365 * 24 * 60 * 60 * 1000 }})); 

		
		app.use(app.router);
		app.use(express.static(__dirname+'/public'));

		app.use(function(req,res,next){
			res.render('404',{title:404,layout:false});
		});//404 handle
		
	});



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

	app.configure('production', function(){
		app.use(express.errorHandler());
		app.use(function(err,req,res,next){
			console.error(err.stack);
	  	res.send(500, 'Something broke!');
		});
	});

	app.use(function(req,res,next){
		res.locals.user = req.session ? req.session.user:'';
		res.locals.keyword = req.session ? req.session.keyword:'';
		res.locals.error = req.session ? req.session.error:'';
		res.locals.success = req.session ? req.session.success:'';
	});

}