Ahhh, I got it now - Thanks so much Simon! The problem was I had left
out close_fds, so it was still spawning as a child process I think.
With close_fds it works a treat - thank you once again :D
- Ollie
On Jul 5, 3:18 pm, Simon Drabble <[EMAIL PROTECTED]> wrote:
> On Thu, 5 Jul 2007, Oliver Charles wrote:
>
> > That doesn't work, I've tried that, it still hangs the view.
>
> > Give it a shot with a long python script (while True: time.sleep(1)
> > would do) and you'll find that the view never returns. If you can get
> > it to return, I'd love to see your code, but it's no go for me...
>
> Well, modulo the script name & arguments, that's the code I'm using
> successfully to run background processes. How have you verified that
> the view does not return? Does the sub-process actually start (i.e.
> can you see it with ps)? What OS are you using, and have you verified
> that the code you are uring works outside of django (write a small
> shell script that does nothing but call the external torrent process -
> does that work as expected?).
>
> -Simon.
>
>
>
> > On Jul 5, 2:57 pm, Simon Drabble <[EMAIL PROTECTED]> wrote:
> >> On Thu, 5 Jul 2007, Oliver Charles wrote:
>
> >>> Just to give an update, I've tried forking the view, and then turning
> >>> the child process into a daemon with a double fork, and then exiting
> >>> before it gets to the return, and letting the parent do the return,
> >>> but this is not working either...
>
> >>> I'm stumped, and don't really want to have to create a specific
> >>> controller daemon (but guess I'm going to have to)
>
> >>> - Olllie
>
> >> Use the subprocess module:
>
> >> import subprocess
> >> ...
> >> script = 'python'
> >> args = (script, '/path/to/executable', ...)
> >> env = { ... }
> >> pid = subprocess.Popen(args, close_fds=True, env=env).pid
>
> >> t = Torrent.objects.create(pid=pid)
> >> ...
>
> >> Remember to store the pid for later wait()ing or you'll end up with
> >> zombies.
>
> >> -Simon.
>
> >>> On Jul 5, 2:58 am, Oliver Charles <[EMAIL PROTECTED]> wrote:
> >>>> Hi
>
> >>>> I'm currently playing around trying to make something akin to
> >>>> TorrentFlux, using Django. TorrentFlux is a system that's PHP and it
> >>>> calls shell scripts to download torrents in the background, with a web
> >>>> interface to control them. For every torrent download, a new process
> >>>> is started, which runs with the torrent - downloading and seeding it.
>
> >>>> My system is similar, and i'm at a very proof of concept stage at the
> >>>> moment. However, I've hit a problem. I can't find a nice way to spawn
> >>>> the processes, without Django hanging as long as the process needs
> >>>> (and for 600mb torrents, that's gonna be hours, and endless if seeding
> >>>> is expected).
>
> >>>> At the moment I am doing:
>
> >>>> def start(request):
>
> >>>> p = os.spawnlp(os.P_NOWAIT, 'python', 'python', '/Users/acid/Work/
> >>>> dTorrent/btdownloadheadless',
> >>>> '/Users/acid/Desktop/Inbox/-{mininova.org}- Professional C+
> >>>> +.torrent')
>
> >>>> t = Torrent.objects.create(pid=p)
>
> >>>> return HttpResponse(str(p))
>
> >>>> But this is hanging, despite the P_NOWAIT (the Torrent model does get
> >>>> created).
>
> >>>> Any ideas?
>
> >> --
>
> --
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