Invoking an OutputFilterHandler for a particular User-Agent

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Hello,

I have added the following configuration in httpd.conf file to insert an output filter handler into the output filters chain for processing .html files before sending them to the client.

....
PerlRequire /usr/local/libexec/perl/startup.pl
PerlModule Apache::CustomFilterTitle

PerlOutputFilterHandler Apache::CustomFilterTitle

....
This is working as expected.
My question is, I need to find a way to invoke the handler ONLY for a particular user-agent.

Here is my environment
Red Hat Enterprise Linux
Apache/2.0.46
perl, v5.8.0

I apperciate your help

Thanks
Woinshet


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Re: Invoking an OutputFilterHandler for a particular User-Agent

On Fri 28 Mar 2008, woinshet abdella wrote:
> PerlRequire /usr/local/libexec/perl/startup.pl
> PerlModule Apache::CustomFilterTitle
>
> =A0 =A0 =A0 =A0PerlOutputFilterHandler Apache::CustomFilterTitle
>
> ...
> This is working as expected.
> My question is, I need to find a way to invoke the handler ONLY for a
> particular user-agent.

use something like the following lines at start of your filter:

unless( $f->ctx ) {
unless( $f->r->headers_in->{'User-Agent'} eq 'Wanted' ) {
$f->remove;
return Apache2::Const::DECLINED;
}
}

Torsten

Re: Invoking an OutputFilterHandler for a particular User-Agent

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Thanks for the reply.

I know it is possible to do it inside the handler. However, for performance reasons, we want to prevent the handler from running on every request by configuring Apache.

Thanks again
Woinshet


----- Original Message ----
From: Torsten Foertsch
To: modperl@perl.apache.org
Cc: woinshet abdella
Sent: Friday, March 28, 2008 10:10:20 AM
Subject: Re: Invoking an OutputFilterHandler for a particular User-Agent

On Fri 28 Mar 2008, woinshet abdella wrote:
> PerlRequire /usr/local/libexec/perl/startup.pl
> PerlModule Apache::CustomFilterTitle
>
> PerlOutputFilterHandler Apache::CustomFilterTitle
>
> ...
> This is working as expected.
> My question is, I need to find a way to invoke the handler ONLY for a
> particular user-agent.

use something like the following lines at start of your filter:

unless( $f->ctx ) {
unless( $f->r->headers_in->{'User-Agent'} eq 'Wanted' ) {
$f->remove;
return Apache2::Const::DECLINED;
}
}

Torsten


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