1 var express = require('express');

     2 var cookie  = require('cookie-parser')

     3 

     4 var app = express();

     5 app.use(cookie());

     6 

     7 app.get('/', function(req, res){

     8     var counter = req.cookies.counter || 0;

     9     res.cookie('counter', counter + 1);

    10     if (counter >= 5) {

    11         res.write('You are a valued customer ' + 

    12                   'visting the site ' + counter + ' times.');

    13     } else {

    14         res.write('This is visit number '+ counter +'!');

    15     }

    16     res.end();

    17 });

    18 

    19 app.listen(8000);