minimal nodejs server

minimal-server.js

var http = require('http'),
    util = require('util'),
    url = require('url');

var handlers = {};

handlers.homepage = function (request, response) {
  response.writeHead(200, { 'Content-type': 'text/plain' });
  response.write('homepage goes here.');
};

function route (path) {
  var routes = [
        { pattern: /^[\/]+$/,
          handler: 'homepage'
        }
      ],
      i = 0, len = routes.length, match = null;
  for (; i < len; i++) {
    if ((match = routes[i].pattern.exec(path)) !== null) {
      return function (request, response) {
        var args = [request, response].concat(match.slice(1));
        try {
          handlers[routes[i].handler].apply(null, args); 
        } catch (ex) {
          throw ex;
        }
      };
    }
  }
}

http.createServer(function (request, response) {
  var handler = route(url.parse(request.url).pathname);
  if (typeof handler === 'undefined') {
    response.statusCode = 404;
  } else {
    try {
      handler(request, response);
    } catch (ex) {
      console.error(util.format('error:', new Date(), ex.message || ex));
      response.statusCode = 500;
    }
  }
  response.end();
}).listen(process.argv[2] || 8000);