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[MacPerl-WebCGI] Re:how to prevent time-out with slow output stream
Dear David,
thanks a lot for your reply.
>>I have a MacPerl CGI (running under MacOS 9, QPQ2.1) that sanns a
>>number of files for patterns and generates a dynamic web-page with
>>the result. As long as the number of files to scan is relatively
>>small everything works fine. However, when I screen about 2500
>>files the CGI takes about 1 min to generate the output. I set the
>>server time-out to 300 sec which should be enough but usually the
>>clients time-out much earlier. Is there a way to prevent this?
>
>As far as I have been able to figure (and I have had some experience
>with this issue) the only solution is to return the output a bit at
>a time, a technique sometimes called "server push". Unfortunately,
>the only way to activate server push for a MacPerl CGI is to name it
>with the .acgi suffix. I say unfortunately in that this ALSO
>signals to QPQ that your CGI can handle a second request while the
>first is still processing, which is very much not true and results
>in anything from a dropped request to a crashed server. For a
>public server I would recommend never doing this. The only time you
>can safely name your CGI scripts with the .acgi suffix is if you can
>guarantee that there will never, ever be overlapping hits or if you
>can tolerate crashes.
>
>If you are still interested, let us know and I will post a "step by step".
So it seems to me the safest way would be to write the output to a
temporary html-file and let a web-page reload this page after 2 min
or so. However, I would be interested in the step-by-step
instruction. The CGI is not expected to handle a lot of requests and
I would appreciate avoiding the temp-file.
Thanks in advance - Christoph
--
Christoph Grunau (Eq. Roizes)
Institut de Genetique humaine (CNRS, IGH)
141 rue de la Cardonille
34396 Montpellier
FRANCE
Tel.: +33 (0) 4 99 61 99 77
Fax: +33 (0) 4 99 61 99 01
Christoph.Grunau@igh.cnrs.fr
http://www.methdb.de
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