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List:       apache-modperl
Subject:    Re: reading multipart forms
From:       jesse () vm ! com (Jesse Erlbaum)
Date:       1999-05-31 23:32:00
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korte@lite.msu.edu,Internet writes:
>Independently of "multipart", I had problems reading POST data into mod_perl
>modules, the $r->content would somehow not do the trick (could be me,
though).
>I ended up writing this:
>-----
>    my $buffer;
>    $r->read($buffer,$r->header_in('Content-length'));
>    my @pairs=split(/&/,$buffer);
>    my $pair; my $name; my $value; my %FORM;
>    foreach $pair (@pairs) {
>       ($name,$value) = split(/=/,$pair);
>       $FORM{$name}=$value;
>    } 
>-----


Thanks for the pointer!  I used the $r->read() method to get at the content,
and that did the trick.  Perhaps the $r->content method can be adapted to
return an array of hashes containing multipart data, or something like that.

FYI, this is for a very interesting proxying system.  Essentially, I needed to
build a passing proxy which would wait until the Handler phase -- until the
Authentication and Authorization phases had "done their thing."  That way, I
could apply security rules to allow or disallow access to proxied directories,
dynamically.  Once the proxy has been allowed, a proxy request is passed to a
localhost Apache HTTP caching proxy server (via LWP) to be executed.

One problem I'm still having is that mod_perl has to receive the entire
response before handing it back to the browser client.  When downloading large
files, this is a pretty bad situation.  Beyond the speed problem, if I
download a 20 MB file, my HTTPd process is now +20 MB!  Not great.

It appears that the built-in Apache HTTPd proxy streams the data instead of
building up a large blob of data and passing it back to the client.  I can't
think of a way to do this same thing in mod_perl.  Any ideas?

Thanks!

-Jesse-



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  Jesse Erlbaum ........... mailto:jesse@vm.com
  Lead Programmer/IT Director .. Vanguard Media
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