in reply to embedded BEGIN and END?

What happens visually when someone clicks render? Do you stay on the same page? Do you send them to a "Generating graphic, please wait" page?

I wouldn't give the user the option to submit more than once. Or, you could call an END block or end() routine to clean up any mess a user may have left. Or, have a pid-type file check before submitting the rendering job.

You may have to do some sort of cookie thing to make sure that users can't submit more than one operation at a time.

Just my $0.02.

J. J. Horner

Linux, Perl, Apache, Stronghold, Unix

jhorner@knoxlug.org http://www.knoxlug.org

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RE: Re: embedded BEGIN and END?
by Aighearach (Initiate) on May 31, 2000 at 16:41 UTC
    Yes, submit sends them to another page.

    Cookies are against my religion for non-login situations. But even ignoring the second send, that wouldn't really stop the server from hanging, because it is the disconnect that creates the problem, not the reconnect.

    END doesn't work from inside a callback. unlock() has to be called from in the sub that calls it. 

    Paris Sinclair    |    4a75737420416e6f74686572
pariss@efn.org    |    205065726c204861636b6572
I wear my Geek Code on my finger.
[reply]
      How about IP-based session tracking? I've never tried it with Perl, but in ColdFusion you can store session variables in a database using the IP address as the primary key. It causes some minor problems with proxy servers, but it shouldn't cause a problem except in extreme circumstances. And if your beliefs don't permit cookies, well, you're limited in options, I would think.

      - Ozymandias

[reply]
        Well, I don't think avoiding all forms of user tracking is really a problem. If it limits the workarounds, forcing me to keep at it until I find a sollution to the underlying problem, then I think that is more of a blessing than a limitation. 
        Paris Sinclair    |    4a75737420416e6f74686572
pariss@efn.org    |    205065726c204861636b6572
I wear my Geek Code on my finger.
[reply]

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