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From "host.md" <o...@molddata.md>
Subject Re: [users@httpd] Apache with ExtFilterDefine problem
Date Fri, 22 Sep 2006 14:14:38 GMT

----- Original Message ----- 
From: "Joshua Slive" <joshua@slive.ca>
To: <users@httpd.apache.org>
Sent: Friday, September 22, 2006 4:15 PM
Subject: Re: [users@httpd] Apache with ExtFilterDefine problem


> On 9/22/06, host.md <oleg@molddata.md> wrote:
>> Hi to all. I am running a site with free hosting on apache. Everything 
>> works
>> fine..until some of our free users, by mistake runs some infinite loops. 
>> The
>> current configuration of the apache is based on ExtFilterOutput, which 
>> sends
>> all the output to a script in perl that adds some banners. The problem is
>> when users by mistake, generate Gigs of output, back to client,  our 
>> server
>> hangs. The perl script takes all the output that apache sends via <STDIN>
>> and adds, as i said, the banner:
>>
>> #perl output filter
>> $stdin=<STDIN>."some_banner_path_here";
>> print $stdin;
>>
>> What happends here is that STDIN becomes very big, and perl script hangs,
>> growings very large, in memory. How can i restrict apache not to generate
>> that much information back to the client? I found nothing in internet 
>> about
>> that. Maybe there are some other methods of adding some ads to html 
>> pages???
>>
>> If for you need some more details please tell me.
>
> Simple solution: have your script count bytes and abort when it
> reaches a certain number.
>
> Even simpler solution: write your script in such a way that it isn't
> buffering the entire request before sending it along.
>
> More stable and performant solution: In place of mod_ext_filter, use
> an apache module that doesn't involve forking a perl script to mangle
> each request.  Examples of modules that can do this include
> mod_publisher, mod_perl, mod_php, etc.
>
> Joshua.

I took a look at mod_perl filters, and it is obvious what i need. It has a 
simple interface to the Apache API , and lots of example, how to use it.
Thanks a lot Joshua!

Oleg R. 


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