[EMAIL PROTECTED] wrote:
>Hello,
>I am using python and CGI to initiate a long running simulation (up to
>5h long) on a remote machine. The main idea is that I use a form, enter
>the parameters and a CGI scripts start the simulation using these
>parameters. The structure of the script is:
>
>1. Read paremeters
>2. Display some information
>3. Start the simulation
>
>For step 3 I use either os.system or os.popen(2). The problem is that
>the web server does not send the information of step 2 back to the
>browser, unless step 3 is completed. The browser simply waits for a
>response, without displaying anything. How can I just read the params,
>display the info I want, start the simulation and then terminate either
>the script or at least the connection to the browser without having to
>wait for the simulation to finish?
You need to close stdout, which closes the socket and allows the browser to
finish. This is what I use:
# We flush stdout, fork, then close stdout. This closes the HTTP socket,
# allowing the browser to continue while we munge with sendmail.
sys.stdout.flush()
if os.fork(): return
fw = open('/dev/null','w')
os.dup2(fw.fileno(),1)
os.dup2(fw.fileno(),2)
--
- Tim Roberts, [EMAIL PROTECTED]
Providenza & Boekelheide, Inc.
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