var express = require('express');
var app = express();
// ...
app.use(require('connect-domains')("example.com"));
app.use(function(req,res){
    //when visiting "www.sub1.example.com"
    console.log(req.domains[0]);//#"example.com"
    console.log(req.domains[1]);//#"sub1"
    console.log(req.domains[2]);//#"www"
    console.log(req.domains).join("/");//#"example.com/sub1/www"
})
app.listen(8080);