Problem with PerlTransHandler

[CrAsH-DMX <cr...@gmail.com>]

Hi all

First of all, I want to clarify that I am pretty newie in mod_perl and I'm
using mod_perl 1.

I need to write a module that allows me to capture all the requests that are
made to my server,
get a string with all the parameters stored in $r->content or $ r-> args for
each request, apply
some process and store again in $r->content or $ r->args to follow their
way.

To achieve this, I'm trying to write a PerlTransHandler:

package Test::test_filter;
use strict;
use Apache::Constants qw(:common);

sub handler {
    my $r = shift;
    my $params = $r->method eq "POST" ? $r->content:$r->args;
    print STDERR "PARAMS:$params\n";
    #DO SOMETHING WITH $params
    #$r->content($params);
    return DECLINED;
}
1;

The problem is, after showing the message with the parameters in the log
file the page with the POST form
does not change; this mean, don't show me the next page where i should see
the values of the modified parameters.

If comment my $params = $r->method eq "POST" ? $r->content:$r->args; all
works fine.

I need to do something else?, I'm using the right type of handler?

In advance thank you very much for your answers.

Re: Problem with PerlTransHandler

[Torsten Förtsch <to...@gmx.net>]

On Wednesday, January 05, 2011 01:09:22 CrAsH-DMX wrote:
> If comment my $params = $r->method eq "POST" ? $r->content:$r->args; all
> works fine.

My mp1 experience is quite a few years old. But I think what you are trying to 
achieve is not feasible, at least if your handler does not read the message 
body via $r->content.

The problem is a call to $r->content reads the message body. If someone 
(mod_cgi for example) tries to do that later again it can only read the end of 
file.

If your document is created by a mod_perl handler that uses $r->content then 
your approach might work. Otherwise if it's a normal CGI script or PHP 
document I doubt it.

Apache2 & Mp2 can do input filtering.

Torsten Förtsch

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