Webservice starting point

router.js

var parser = require('url');

var handlers = {};
 
var Handler = function(callback) {
  this.process = function(req, res) {
    params = null;
    return callback.apply(this, [req, res, params]);
  }
}
 
exports.clear = function() {
  handlers = {};
}
 
exports.GET = function(url, callback) {
  exports.register('GET', url, callback);
}
 
exports.POST = function(url, callback) {
  exports.register('POST', url, callback);
}
 
exports.PUT = function(url, callback) {
  exports.register('PUT', url, callback);
}
 
exports.DELETE = function(url, callback) {
  exports.register('DELETE', url, callback);
}

exports.register = function(method, url, callback) {
  if (typeof handlers[url] === 'undefined') {
    handlers[url] = {};
  };
  handlers[url][method] = new Handler(callback);
}

var fourOhFourHandler = new Handler(function fourOhFour(req, res) {
  res.writeHead(404, {});
  res.end();
});

var methodNotAllowedHandler = new Handler(function methodNotAllowed(req, res) {
  res.writeHead(405, {});
  res.end();
});
 
exports.route = function(req, res) {
  url = parser.parse(req.url, true);

  var pathHandlers = handlers[url.pathname];

  if (!pathHandlers) return fourOhFourHandler;

  return pathHandlers[req.method] || methodNotAllowedHandler;
}

server.js

var http = require('http');
var router = require('./router');
 
router.GET('/', function(req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.write('Hello World');
  res.end();
});
 
var server = http.createServer(function (req, res) {
  handler = router.route(req);
  handler.process(req, res);
});
 
port = process.env['PORT'] || 80
server.listen(port);
console.log("Listening on port " + port);