I am running a website that serves static HTMLs containing links to some PDF files. I wish to grant conditional access to these PDFs. That is, if a user clicks on a link to PDF, say his userid is looked up in a database and then if it is present, the user is allowed to view the PDF.
Is there anything in CGI-Perl/apache that allows this kind of filtering? I am NOT using mod-perl.
I understand one solution is to do something like 
<a href='http://server.com/cgi-bin/check_user.pl?my_file.pdf'>

[download]

instead of simple 
<a href='http://server.com/htdocs/my_file.pdf'>

[download]

The Perl script will check for user and do stuff.
But is there anything configurable in apache itself that would allow my check_user.pl script to run for every PDF file accessed?

In reply to Filter apache web get request using cgi-perl by cheekuperl

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