CORS support example adapted from https://github.com/visionmedia/express/blob/master/examples/cors/index.js

cors.js

/**
 * Add CORS support.
 */
app.all('*', function (req, res, next) {
  if (!req.get('Origin')) {
    return next();
  }
  
  // use "*" here to accept any origin
  res.set('Access-Control-Allow-Origin', '*');
  res.set('Access-Control-Allow-Methods', 'GET, POST');
  res.set('Access-Control-Allow-Headers', 'X-Requested-With, Content-Type');
  // res.set('Access-Control-Allow-Max-Age', 3600);
  if ('OPTIONS' == req.method) {
    return res.send(200);
  }
  
  next();
});