详解Node.js开发中的express-session

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

var app = express();

app.use(cookieParser());
app.use(session({
  secret: '12345',
  name: 'testapp',  //这里的name值得是cookie的name，默认cookie的name是：connect.sid
  cookie: {maxAge: 80000 }, //设置maxAge是80000ms，即80s后session和相应的cookie失效过期
  resave: false,
  saveUninitialized: true,
}));


app.get('/awesome', function(req, res){
  
  if(req.session.lastPage) {
    console.log('Last page was: ' + req.session.lastPage + ".");  
  }  
  req.session.lastPage = '/awesome'; //每一次访问时，session对象的lastPage会自动的保存或更新内存中的session中去。
  res.send("You're Awesome. And the session expired time is: " + req.session.cookie.maxAge);
});

app.get('/radical', function(req, res){
  if (req.session.lastPage) {
    console.log('Last page was: ' + req.session.lastPage + ".");  
  }
  req.session.lastPage = '/radical'; 
  res.send('What a radical visit! And the session expired time is: ' + req.session.cookie.maxAge);
});

app.get('/tubular', function(req, res){
  if (req.session.lastPage){
    console.log("Last page was: " + req.session.lastPage + ".");  
  }

  req.session.lastPage = '/tubular';
  res.send('Are you a suffer? And the session expired time is: ' + req.session.cookie.maxAge);
});


app.listen(5000);