RE: [mp2][QUESTION]: Filter to modify request headers on a proxy server
Hi, I've just tried that script again (see link below) using a POST request. In the error log file, there is the content of the POST Request e.g. user=cpringlepassword=x but nothing else. There is no HTTP headers. My Apache directive to enable the filter is PerlInputFilterHandler iPAQApache::ResetBrowser Is this the correct directive? _/*** * _/ **Chris Pringle** _/ *Industrial Trainee ** *** _/_/_/ _/_/_/ *Personal Systems Group (PSG) ** ***_/ _/ _/ _/*Hewlett Packard - Bristol** *** _/ _/ _/_/_/ * ** _/ INVENT **Tel - +44 (0) 117 31 29664 ** ** _/Email - [EMAIL PROTECTED] ** *** _/ * -Original Message- From: Stas Bekman [mailto:[EMAIL PROTECTED] Sent: 18 September 2003 11:37 To: Pringle, Chris (HP-PSG) Cc: [EMAIL PROTECTED] Subject: Re: [mp2][QUESTION]: Filter to modify request headers on a proxy server Pringle, Chris (HP-PSG) wrote: Hi, I am trying to write a filter that will sit on a proxy server and alter HTTP requests. Basically, what I want it to do is modify the User-Agent header field so that when the request is proxied, the remote web server gets a different User-Agent header field to the one that was originally sent by the browser. There are also other header fields I may need to modify, but I would imagine this is a simple task once I've worked out how to alter the User-Agent field. Does anyone have any ideas how I might go about doing this? I've tried writing several PerlInputFilterHandlers, all with no success. Will input filters work with a proxy? I've got output filters working with no problem. Any sample code to do what I want, along with the relavent Apache directives would be very much appreciated! The sample code that you need is here: http://perl.apache.org/docs/2.0/user/handlers/filters.html#Connection_In put_Filters I haven't tried to mix filters with proxy, but I see no reason why shouldn't it work. It might not work if proxy is implemented as a filter itself and is running before the modperl filters, need to look at the actual implementation. __ Stas BekmanJAm_pH -- Just Another mod_perl Hacker http://stason.org/ mod_perl Guide --- http://perl.apache.org mailto:[EMAIL PROTECTED] http://use.perl.org http://apacheweek.com http://modperlbook.org http://apache.org http://ticketmaster.com
Re: [mp2][QUESTION]: Filter to modify request headers on a proxy server
Pringle, Chris (HP-PSG) wrote:
Hi,
I've just tried that script again (see link below) using a POST request.
In the error log file, there is the content of the POST Request e.g.
user=cpringlepassword=x but nothing else. There is no HTTP headers.
My Apache directive to enable the filter is
PerlInputFilterHandler iPAQApache::ResetBrowser
Is this the correct directive?
The directive is correct, but you don't show your code and your config, so I
have no idea if the rest is correct or not. This directive is used to
configure both, connection and request level filters. It's the attribute of
the handler subroutine is what makes the difference and the placement in
httpd.conf.
You need to declare it as:
package iPAQApache::ResetBrowser;
use base qw(Apache::Filter);
sub handler : FilterConnectionHandler { your code is here }
1;
and you need to put it outside of Location or similar block in httpd.conf
just like shown at:
http://perl.apache.org/docs/2.0/user/handlers/filters.html#Connection_Input_Filters
Also make sure that you run at least mod_perl 1.99_09, or even better the
current cvs. And in the future please follow the info at
http://perl.apache.org/bugs/ so we know more about your setup.
__
Stas BekmanJAm_pH -- Just Another mod_perl Hacker
http://stason.org/ mod_perl Guide --- http://perl.apache.org
mailto:[EMAIL PROTECTED] http://use.perl.org http://apacheweek.com
http://modperlbook.org http://apache.org http://ticketmaster.com
RE: [mp2][QUESTION]: Filter to modify request headers on a proxy server
Thanks for this. I had put 'PerlInputFilterHandler
iPAQApache::ResetBrowser' inside the proxy block, and it should have
been outside like you said.
_/***
* _/ **Chris Pringle**
_/ *Industrial Trainee **
*** _/_/_/ _/_/_/ *Personal Systems Group (PSG) **
***_/ _/ _/ _/*Hewlett Packard - Bristol**
*** _/ _/ _/_/_/ * **
_/ INVENT **Tel - +44 (0) 117 31 29664 **
** _/Email - [EMAIL PROTECTED] **
*** _/ *
PerlInputFilterHandler iPAQApache::ResetBrowser
Is this the correct directive?
The directive is correct, but you don't show your code and your config,
so I
have no idea if the rest is correct or not. This directive is used to
configure both, connection and request level filters. It's the attribute
of
the handler subroutine is what makes the difference and the placement in
httpd.conf.
You need to declare it as:
package iPAQApache::ResetBrowser;
use base qw(Apache::Filter);
sub handler : FilterConnectionHandler { your code is here }
1;
and you need to put it outside of Location or similar block in
httpd.conf
just like shown at:
http://perl.apache.org/docs/2.0/user/handlers/filters.html#Connection_In
put_Filters
Also make sure that you run at least mod_perl 1.99_09, or even better
the
current cvs. And in the future please follow the info at
http://perl.apache.org/bugs/ so we know more about your setup.
__
Stas BekmanJAm_pH -- Just Another mod_perl Hacker
http://stason.org/ mod_perl Guide --- http://perl.apache.org
mailto:[EMAIL PROTECTED] http://use.perl.org http://apacheweek.com
http://modperlbook.org http://apache.org http://ticketmaster.com
Re: [mp2][QUESTION]: Filter to modify request headers on a proxy server
Pringle, Chris (HP-PSG) wrote:
Thanks for this. I had put 'PerlInputFilterHandler
iPAQApache::ResetBrowser' inside the proxy block, and it should have
been outside like you said.
So it did work this time, right? Perhaps we should issue a warning if a
connection filter is found insider Location or alike.
PerlInputFilterHandler iPAQApache::ResetBrowser
Is this the correct directive?
The directive is correct, but you don't show your code and your config,
so I
have no idea if the rest is correct or not. This directive is used to
configure both, connection and request level filters. It's the attribute
of
the handler subroutine is what makes the difference and the placement in
httpd.conf.
You need to declare it as:
package iPAQApache::ResetBrowser;
use base qw(Apache::Filter);
sub handler : FilterConnectionHandler { your code is here }
1;
and you need to put it outside of Location or similar block in
httpd.conf
just like shown at:
http://perl.apache.org/docs/2.0/user/handlers/filters.html#Connection_In
put_Filters
Also make sure that you run at least mod_perl 1.99_09, or even better
the
current cvs. And in the future please follow the info at
http://perl.apache.org/bugs/ so we know more about your setup.
__
Stas BekmanJAm_pH -- Just Another mod_perl Hacker
http://stason.org/ mod_perl Guide --- http://perl.apache.org
mailto:[EMAIL PROTECTED] http://use.perl.org http://apacheweek.com
http://modperlbook.org http://apache.org http://ticketmaster.com
Re: [mp2][QUESTION]: Filter to modify request headers on a proxy server
Pringle, Chris (HP-PSG) wrote: Hi, I am trying to write a filter that will sit on a proxy server and alter HTTP requests. Basically, what I want it to do is modify the User-Agent header field so that when the request is proxied, the remote web server gets a different User-Agent header field to the one that was originally sent by the browser. There are also other header fields I may need to modify, but I would imagine this is a simple task once I've worked out how to alter the User-Agent field. Does anyone have any ideas how I might go about doing this? I've tried writing several PerlInputFilterHandlers, all with no success. Will input filters work with a proxy? I've got output filters working with no problem. Any sample code to do what I want, along with the relavent Apache directives would be very much appreciated! The sample code that you need is here: http://perl.apache.org/docs/2.0/user/handlers/filters.html#Connection_Input_Filters I haven't tried to mix filters with proxy, but I see no reason why shouldn't it work. It might not work if proxy is implemented as a filter itself and is running before the modperl filters, need to look at the actual implementation. __ Stas BekmanJAm_pH -- Just Another mod_perl Hacker http://stason.org/ mod_perl Guide --- http://perl.apache.org mailto:[EMAIL PROTECTED] http://use.perl.org http://apacheweek.com http://modperlbook.org http://apache.org http://ticketmaster.com
