gistfile1.js

var http = require('http');
var path = require('path');
var fs = require('fs');

var mimeTypes = {
  '.js' : 'text/javascript',
  '.html' : 'text/html',
	'.css' : 'text/css'
};

var processRequest = function(request, response) {
	console.log('Inicio');
	var lookup = path.basename(decodeURI(request.url)) || 'index.html', f = 'content/'
			+ lookup;
	console.log('log: ', f);
	fs.exists(f, function(exists) { // path.exists for Node 0.6 and below
		if (exists) {
			fs.readFile(f, function(err, data) {
				if (err) {
					response.writeHead(500);
					response.end('Server Error!');
					return;
				}
				var headers = {
					'Content-type' : mimeTypes[path.extname(lookup)]
				};
				response.writeHead(200, headers);
				response.end(data);
				console.log('Arquivo lido: ', f);
			});
			return;
		}
		response.writeHead(404); // no such file found!
		response.end('Page Not Found!');
	});
};

http.createServer(processRequest).listen(80);