express-session module

app.js

var  express = require('express');
var session = require('express-session');
var app = express();
app.use(session({
	secret:'dsafdsa',
    cookie:{maxAge:60*1000*30}
}));

app.get('/', function(req, res){
	if(req.session.sign){  //检查用户是否已登录
      console.log(req.session);
      res.send('welcome <strong>'+req.session.name+ '</strong>', 欢迎再次登录);
    } else{
      req.session.sign = true;
      req.session.name = '汇智网';
      res.send('欢迎登录');
    }
});

app.listen(80);