[Zope] Showing progress for long running tasks

[Florian Schulze]

Hi!

I want to write a function which invokes wget for a given URL. Now this  
can take quite some time, how can I provide some progress indicator? I  
don't think it's practical to stream data to the browser until the  
donwload is complete, so I need some way to check back on the progress  
every time a special page is requested. So the question is, how can I  
start a process in the background and check back on it ('s stdout)  
whenever requested?
I'm using Zope 2.7.0 and Plone 2.0.3.

Regards,
Florian Schulze