[Node.js] Show session ID on console

This is a example how to use express-session. After create this file and install dependency package (npm install –save xxx).
Open the webpage and type “192.168.56.101/admin” will show different session for different web browser.

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;
    console.log(req.sessionID);   // show session ID
    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");
});

Experiment result:
Through this experiment I understand when close web browser, the session id will be droped. But no matter how many tab will be opened on same web browser, the session id will be the same.


Reference:

• Manage session using Node.js and Express 4
• How can I find the session Id when using express / connect and a session store?