single.js

var http = require("http");
var url = require("url");

function writeResponse(response, code, text) {
  response.writeHead(code, {"Content-Type": "text/plain"});
  response.write(text);
  response.end();
}

function index(response) {
  writeResponse(response, 200, "Hello World");
}

function index2(response) {
  writeResponse(response, 200, "Hi World");
}

routingTable = {}
routingTable['/index'] = index;
routingTable['/index2'] = index2;

function route(pathname, response) {
  console.log("Incoming request -- " + pathname);
  if (typeof routingTable[pathname] === 'function') {
    return routingTable[pathname](response);
  } else {
    console.log(pathname + " == 404");
    writeResponse(response, 404, "404 Not found");
  }
}

http.createServer(function(request, response) {
    var pathname = url.parse(request.url).pathname;
    console.log("Received request for " + pathname);
    route(pathname, response);
}).listen(8888);
console.log("Server started.");