Node.js ExpressJs创build会话

如何在expressjs（4.0）中创build会话？

我在链接中完全一样

var session = require('express-session'); /* session */ app.use(session({ secret: '1s2sd25asd7asd5asd7f4f1f'})) 

但是，它会给出错误？

 TypeError: Cannot read property 'connect.sid' of undefined 

如何在expressjs中创build会话？ 我一直在尝试创build3天的会话。

Answer 1

在快递4中，创build这样的会话

 var express = require('express'); var app = express(); var cookieParser = require('cookie-parser'); var session = require('express-session'); 

会话前必须使用cookieParser

 app.use(cookieParser()) app.use(session({secret: 'MySecret'})); 

欲了解更多信息，请阅读连接官方文档

Answer 2

完整的代码：

 var express = require('express'); var session = require('express-session'); var bodyParser = require('body-parser'); var app = express(); app.set('views', __dirname + '/views'); app.engine('html', require('ejs').renderFile); app.use(session({secret: 'ssshhhhh'})); app.use(bodyParser.json()); app.use(bodyParser.urlencoded({extended: true})); var sess; app.get('/',function(req,res){ sess=req.session; //Session set when user Request our app via URL if(sess.email) { /* * This line check Session existence. * If it existed will do some action. */ res.redirect('/admin'); } else{ res.render('index.html'); } }); app.post('/login',function(req,res){ sess=req.session; //In this we are assigning email to sess.email variable. //email comes from HTML page. sess.email=req.body.email; res.end('done'); }); app.get('/admin',function(req,res){ sess=req.session; if(sess.email) { res.write(' <h1>Hello '+sess.email+'</h1> '); res.end('<a href="+">Logout</a>'); } else { res.write(' <h1>Please login first.</h1> '); res.end('<a href="+">Login</a>'); } }); app.get('/logout',function(req,res){ req.session.destroy(function(err){ if(err){ console.log(err); } else { res.redirect('/'); } }); }); app.listen(3000,function(){ console.log("App Started on PORT 3000"); }); 

在这里阅读： http : //codeforgeek.com/2014/09/manage-session-using-node-js-express-4/