server.js

var server = null;
var port = 3000;
var mbedUrl = 'http://192.168.100.44';

function redirect(req, res, oncomplete){
  console.log(req);
  var path = req._path + '?' + req._queryString;
  var req = new XMLHttpRequest();
  req.open('GET', mbedUrl + path, true);
  try {
    req.send();
  }catch(e){
    console.log(e);
  }
  oncomplete();
}

function changeFace(req, res, oncomplete){

}

function respondAmbient(req, res, oncomplete){

}

function init() {
  // prepare server
  server = new HttpServer();
  console.log('new server');

  server.get('/api/motor/right',  redirect);
  server.get('/api/motor/left', redirect);
  server.get('/api/tail/swing/start', redirect);
  server.get('/api/tail/swing/end', redirect);

  server.get('/api/face/smile', changeFace);
  server.get('/api/face/sad', changeFace);
  server.get('/api/face/angry', changeFace);

  server.get('/api/ambient/light', respondAmbient);

  try {
    server.start(port);
  }catch(e){
    console.log(e);
  }
  console.log('start server');
}

addEventListener('load', init);