Question

In a pylons controller, I would like to first return the response to the request (so that the user gets a response ASAP), and then perform some additional operations (say, updating view counts, etc.) that didn’t need to happen to generate the response. What’s the best-practice for doing things like this?

Thanks!

Answer 1

On most wsgi-based servers (like the standard wsgiref, nwsgi etc) there is a way to send some portion of a body out work a little more and send some more. I guess the “send some more” is optional.

Use yield instead of return. WSGI example (not sure if it translates well into Pylons):

def application(environ, start_response):
    start_response('200 OK', [('Content-type','text/plain')])
    yield 'body starts. You should see this in browser already'
    # do something
    yield 'some more of body'

Once the request handler runs out of code to run, it closes the connection.

Now, this is sure to work on standard wsgi servers I tried. I would like to hear if this works on Pylons.