Question

I am using the web.py framework to set up my website. When I click a button, I want to POST data to the server and then send back data via a generator function / yield. Basically yield data as it’s ready, not wait for my data function to fully finish.

I get yield to work via GET, but my POST implementations via AJAX is the problem.

def POST(self):
    web.header('Content-type','text/html')
    web.header('Transfer-Encoding','chunked')
    yield "hello"
    sleep(10)
    yield "hello"

And my javascript:

<script type="text/javascript">
    jQuery(document).ready(function() {
        jQuery("#button").click(function() {
            jQuery.ajax({
                  type: "POST",
                  dataType: "text",
                  cache: false,
                  success: function(data){
                    jQuery("#container").html(data)
                  }
                }); }); });
</script>

Output:

HelloHello (after 10 seconds) 
rather than..
Hello (10 second delay) Hello

Note: I am using web.py’s built in server on my local machine.

Answer 1

Foolish me – AJAX doesn’t support streaming. So this is a case when Comet or HTML5 WebSockets will come in handy.