Question

I am trying to build chat application with long polling mechanism on Google app engine server.
HTTPRequest has default time out of 30 seconds, so I am sending polling request to server every 28 seconds if there is no update from server (so that I wont miss any message from other clients).
First request gets registered, but second request sent after 28 seconds is not reaching server.

function loadPage(query){
$.get({ url: query, success: function(events){
   updated = 1;
   //events data processing
   createServerChannel();
     });
}

  function createServerChannel(){
      var query='/ChatController?&user='+userName+'&sessionName='+sessionName+'&register=true';
      loadPage(query);
      updated = 0;
      setInterval(function() { poll(query); }, 28000);
   };

   function poll(query){
       if(updated==0){
          loadPage(query);
       }
   }

I am using thread.wait() for request to wait on server. Is there any way to consume first pending request when next request from same client is available.
Please help.

Answer 1

I think web sockets might be a better approach as this keeps a continuous connection open to the server and waits for the server to push data to the client.

http://www.html5rocks.com/en/tutorials/websockets/basics/