gistfile1.txt

// run sockjs server on port 9999
// use an old browser (ex: FF 3.5) which connects via polling transport
// frontend on 8888


  bouncy(function (req, bounce) {
      if(headers.hasOwnProperty('upgrade')) {
        // check if the request for upgrade is for websocket
        // else just destroy the socket

        if(headers.upgrade.toLowerCase() === 'websocket') {
            bounce(9999);
            return;

            // skip nonwebsocket + regular request
        } else {
          req.socket.destroy();
          return;
        }
      }

      var url = req.url.split('/').slice(0, 3).join('/'); // this is for the mount point
      if(url.search('/echo/') === 0) {
        var server = parseInt(url.split('/echo/')[1]); // check if request is to
                                                       // a genuine sockjs server
                                                       // and not some crappy
                                                       // iframe.html request
        if(!isNaN(server)) {
          bounce(9999);
          return;

          // skip regular request
        }
      }

      bounce(9999);
      return;
    }
  }).listen(8888);