a small example on how to handle routing, not meant for production use

server.js

var http      = require('http'), //http server
    urlparser = require('url'), //url parser & builder
    host      = 'sandbox',
    port      = 1337;
http.createServer(function (req, res) {
    var response = 'Hello, World!\n',
        url      = urlparser.parse(req.url, true).pathname;
    switch (url) {
        case('/hello'): //check for path, alternatively strip the front slash
            response = 'World!\n';
            break;
        case('/world'): //check for path, alternatively strip the front slash
            response = 'Hello, \n';
            break;
    }

    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.end(response);
}).listen(port, host);
console.log('Server running at http://' + host + ':' + port + '/');