Node.js ExpressJs创建会话

Question

如何在expressjs（4.0）中创建会话？

我在链接中做的完全一样

var session = require('express-session');

/* session */
app.use(session({ secret: '1s2sd25asd7asd5asd7f4f1f'}))

但是，它给出了错误？

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

如何在expressjs中创建会话？ 我已经尝试创建会话3天了。

Answer 1

在Express 4中，像这样创建会话

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

您必须在会话之前使用cookieParser

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

有关更多信息， 请在此处阅读connect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/