Node.js HTTP

net / require("net")            the foundation for creating TCP server and clients 
dgram / require("dgram")        functionality for creating UDP / Datagram sockets 
http / require("http")          a high-performing foundation for an HTTP stack 
https / require("https")        an API for creating TLS / SSL clients and servers 

var http = require("http"); 
//from m.o2fo.com
var server = http.createServer(function (request, response) { 
    console.log("request starting...");
     // respond 
    response.write("hello client!"); 
    response.end(); 
}); 
server.listen(3000); 
console.log("Server running at http://127.0.0.1:3000/"); 

var http = require("http"); 
//m.o2fo.com
var server = http.createServer(function (req, res) { 
    console.log("request headers..."); 
    console.log(req.headers);
     // respond 
    res.write("hello client!"); 
    res.end(); 
}).listen(3000); 
console.log("server running on port 3000");