Progress bar with long web requests

Question

In the django application I'm working on, I just added the ability to archive multiple files (starting at 50 mb) into a zip file. I am currently doing it something like this:

get files to zip
zip all files
send HTML response

Obviously, this leads to a lot of waiting on line 2, where the files are compressed. What can I do to make this process much better for the user? Although having a progress indicator would be better, even if it just returned a static page that says "please wait" or something else.

Any thoughts and ideas will be loved.

Answer 1

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django-lineup

:

from lineup import registry
from lineup import _debug

def create_archive(queue_id, queue):
    queue.set_param("zip_link", _create_archive(resource = queue.context_object, user = queue.user))
    return queue


def create_archive_callback(queue_id, queue):
    _send_email_notification(subject = queue.get_param("zip_link"), user = queue.user)
    return queue

registry.register_job('create_archive', create_archive, callback = create_archive_callback)

:

    from lineup.factory import JobFactory
    j = JobFactory()
    j.create_job(self, 'create_archive', request.user, your_resource_object_containing_files_to_zip, { 'extra_param': 'value' })

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./manage.py run_queue

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Answer 2

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http://www.chrisharrison.net/projects/progressbars/index.html

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3.0 -> begin, no file still processed
3.1 -> 1 file on 3 processed, 33% task complete
3.2 -> 2 file on 3 processed, 66% task complete
3.3 -> 3 file on 3 processed, 100% task complete

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