gistfile1.js

//  import the http module
var http = require('http');

//	create a server
var server = http.createServer();

//	define a handler for the 'request' event, triggered
//	when a client makes a request of the server - 
//	request and response objects will be passed to the handler
server.on('request', function(req, res){
	
	//	define a handler for the 'end' event, triggered once
	//	the request is finished
	req.on('end', function(){

		//	output request info to the console, so we know
		//	something's happening
		console.log(new Date() +  ' - ' + req.url);

		//	write a basic response header
		res.writeHead(200, {
			'content-type': 'text/plain'
		});

		//	write the body of the response
		res.write('Hello, world.');

		//	end the response
		res.end();
	});
});

//	tell the server to listen for requests on port 3000
server.listen(3000);

//	output to the console that the server is ready
//	to handle requests
console.log('listening for requests on port 3000...');