CGI question

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  • Rohan
    #1

    CGI question

    Hi

    I have python-CGIs for my web application running on apache 2.
    Few of the CGIs run for a long time.

    When such a CGI is running and user presses "Stop" button of browser
    (or connection is aborted) how can I identify such situation and
    terminate
    the CGI.
    I don't want the CGI to complete the processing and terminate when it
    tries to write to client pipe.
    It would be good to terminate it as soon as client connection is
    aborted.

    How can I achieve this?

    Any help is appreciated!

    Thanks
    Rohan
    Tags: None
    • Diez B. Roggisch
      #2
      Re: CGI question

      Rohan wrote:
      Hi
      >
      I have python-CGIs for my web application running on apache 2.
      Few of the CGIs run for a long time.
      >
      When such a CGI is running and user presses "Stop" button of browser
      (or connection is aborted) how can I identify such situation and
      terminate
      the CGI.
      I don't want the CGI to complete the processing and terminate when it
      tries to write to client pipe.
      It would be good to terminate it as soon as client connection is
      aborted.
      >
      How can I achieve this?
      The only way I can think of is to regularly output something inside the CGI,
      and thus make it fail in the very moment the pipe is closed.

      But I didn't try that myself - and if it doesn't work I don't think you
      stand a chance, because that's the way sockets work - there is no
      signalization beyond that, and even if it were it's not propagated across
      CGI.

      Diez

        Comment

        • Rohan
          #3
          Re: CGI question

          Thanks Diez for your suggestion.
          >
          The only way I can think of is to regularly output something inside the CGI,
          and thus make it fail in the very moment the pipe is closed.
          >
          I also thought of this, but this looks little crude approach.
          The problem seems very generic I was wondering if it could be handled
          more
          gracefully by some configuration in Apache or cgi script.

          Apache process handling the request would close the connection with
          client,
          but it won't notify anything to spawned CGI process, so it keeps
          running.


            Comment

            • Poppy
              #4
              Re: CGI question

              Can you consider a webservice under something like CherryPY, rather than
              cgi? It may provide more options.


              "Rohan" <nrohan@gmail.c omwrote in message
              news:bf1929ee-647b-4046-b1ea-d693020503a2@w1 g2000prd.google groups.com...
              Thanks Diez for your suggestion.
              >
              >>
              >The only way I can think of is to regularly output something inside the
              >CGI,
              >and thus make it fail in the very moment the pipe is closed.
              >>
              >
              I also thought of this, but this looks little crude approach.
              The problem seems very generic I was wondering if it could be handled
              more
              gracefully by some configuration in Apache or cgi script.
              >
              Apache process handling the request would close the connection with
              client,
              but it won't notify anything to spawned CGI process, so it keeps
              running.
              >
              >

                Comment

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