Are there progress update events in jQuery ajax?

Question

i have long running task that gets called using jquery ajax. i am using the block ui plugin to show \"loading\". is there anyway i can send progress messages back to the

Answer 1

What you are trying to do is something similar to Comet. Traditional ("non-comet") webservers are not designed for this kind of transaction model and is therefore not a desired solution.

My suggestion is to break up the processing in one client request per data source:

function loadData() {
   // Each call passes callback(id) as a success handler
   fireAsynchronousRequest("source1");
   fireAsynchronousRequest("source2");
   fireAsynchronousRequest("source3");
}

function callback(var source) {
   if (source == "source1") {
       updateStatus("Source 1 loaded");
   }
   else if (source == "source2") {
       updateStatus("Source 2 loaded");
   }
}

This is an example of an asynchronous solution. You can implement state handling in callback() if you need it to be synchronous.