Re: subprocess & redirect

"Jonathan Ellis" <[email protected]> Mon, 20 Mar 2006 16:03:17 -0800
Newsgroups	gmane.comp.python.spyce.general
Message-ID	<[email protected]>
Did you try using the native spyce server?  It should work fine there. 
I wouldn't be surprised if mod_python or something else is screwing with
you.

On Mon, 20 Mar 2006 16:14:29 -0500, "Philip Semanchuk"
<[email protected]> said:
> Hi all,
> I'm trying to spawn a subprocess in response to a form submission and 
> it isn't behaving as I'd like. The subprocess will run for a long time 
> (minutes or hours, possibly even days) and so I want to spawn it 
> *asynchronously* and then immediately redirect the user to a page that 
> says "Your job has been started, go get a cup of coffee" etc. However, 
> the redirect doesn't occur until the spawned process completes.
> 
> There's an example below. In the example, foo.py is just a stub that 
> calls time.sleep(10). I tried spawning foo.py using the subprocess 
> module (from Python 2.4) and also using os.spawnl(os.P_NOWAIT...). The 
> two should be equivalent, and indeed neither gives me asynchronous 
> execution although I expect that both would. They spawn an asynchronous 
> process when called outside of the context of Spyce, so there's some 
> interaction here that I don't understand. Can anyone enlighten me? I'd 
> appreciate it.
> 
> Thanks
> Philip
> 
> 
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" 
> "http://www.w3.org/TR/html4/strict.dtd">
> <html lang="en">
> <head>
> 	<meta http-equiv="content-type" content="text/html; charset=utf-8">
> 	<title>test</title>
> </head>
> <body>
> 
> <p>redirect test</p>
> 
> [[.import name=redirect]]
> 
> [[\
>      import subprocess
>      import os
> 
>      TheLongRunningProcess = "/usr/local/MyStuff/src/foo.py"
> 
>      subprocess.Popen(["python", TheLongRunningProcess])
> 
>      #os.spawnl(os.P_NOWAIT, "/usr/bin/python", "/usr/bin/python", 
> TheLongRunningProcess)
> 
>      redirect.external("http://google.com")
> 
>      # This doesn't make a difference
>      raise spyceDone
> 
> ]]
> 
> </body>
> </html>
> 
> 
> 
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