Openshift node.js phantom GET requests

I just started logging all requests to an Openshift node instance,

It's getting hit with a GET/ request every ~10 seconds and req.headers.origin is undefined

Less frequent when I don't call next()

'/*': function (req, res, next) {
  console.log( "Route " + req.method + ":" + req.url + " " + req.headers.origin);
  if( typeof req.headers.origin !== 'undefined') {
    return next();
  }
}