Limit output filter by response code

I'm using external filters to minify javascript and CSS files as they
head out of the server. The minifier takes a good 500ms to run,
causing serious drag. So I put Squid in front of the server and
configured it as a caching proxy. The problem is, the filters are
running even on "304 Not Modified" responses, meaning there isn't
actually any content to minify.

So I want to be able to configure whether or not the filter is used
based on the response code. Is this possible? Alternatively, if I can
access the response code in the ext filter (as an env var or command
line parameter, for instance), then I can make the decision there.

Any help would be really great.
Thanks,
-Brian

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Re: mod_proxy_ajp (2.2.13) + Tomcat 6.0.20 - APR does not understand this error code: proxy: read response failed

Hi, first of all, thanks for your answer.

And about the error, I also thought that could be the problem, but the
thing is when that error is logged on Apache, the Tomcat instances are
NOT using their MaxThreads capabilities.

Another issue we have is that, when this problem appears, the
processing threads on Tomcat start taking longer responses than
regular usage.

Thanks again,
-Damian

On Sat, Oct 31, 2009 at 7:46 PM, André Warnier <aw <at> ice-sa.com> wrote:
> Damian Traverso wrote:
>>
>> Hi,
>> we have one Apache-2.2.13 running mod_proxy_ajp + mod_proxy_balancer,
>> connected to (3) Tomcat-6.0.20 instances under Fedora release 8. We
>> are experiencing some issues with high CPU load on the Tomcat side,
>> and Apache starts logging errors like these
>>
>> [Fri Oct 30 14:47:43 2009] [error] (70007)The timeout specified has
>> expired: ajp_ilink_receive() can't receive header
>> [Fri Oct 30 14:47:43 2009] [error] ajp_read_header: ajp_ilink_receive
>> failed
>> [Fri Oct 30 14:47:43 2009] [error] (120006)APR does not understand
>> this error code: proxy: read response failed from
>>
>> On Tomcat side we are using the APR Native Connector, with this settings:

mod_rewrite and setenv

Re: mod_rewrite and setenv

Re: mod_rewrite and setenv

Re: mod_rewrite and setenv

Re: mod_rewrite and setenv

Andrei Iarus wrote:
> Thanks very much for the fast responses. Can this info be added in the mod_rewrite documentation, as this
is very important for future questions?
>  
It's already there, see :
http://httpd.apache.org/docs/2.2/env.html
Some Caveats

> OR: can the order of processing be changed?
> 
Are you kidding ?

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disable OutputBuffer filtering

Hi,

I want to have a directory with file serving throttled to emulate a slow
connection for site debugging purposes. Is there an obvious solution i haven't
thought about? This is what i managed to come up with so far:

ExtFilterDefine slowdown mode=output cmd=/var/www/slow/slowCat
preservescontentlength
<Location /slow/≥
        SetOutputFilter slowdown
</Location>

The slowCat is a short program (written in haskell) which disables buffering and
pipes data from stdin to stdout, chracter by character, with a tiny sleep after
each character. When i try it in the shell, it works just right.

I would expect the server to send the data piecemeal to the client (and the
client to parse the data node by node, web browsers do that), but what happens
instead is a long delay and then the data arriving in a single burst. My
conclusion is that apache is buffering the data somewhere. What am i doing
wrond, is there any solution to this problem?

Any help much appreciated
Ivan Vadovic

The slowCat appears to work right and looks like this:

import System.Posix
import System.IO
import System.IO.Error

main :: IO ()
main = do hSetBuffering stdout NoBuffering
          hSetBuffering stdin NoBuffering
          try copy
          return ()

copy :: IO ()
copy = getChar >>= putChar >> usleep (10 ^ 4) >> copy

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Re: mod_rewrite and setenv

On Sun, Nov 1, 2009 at 2:36 PM, André Warnier <aw <at> ice-sa.com> wrote:
> Andrei Iarus wrote:
>>
>> Thanks very much for the fast responses. Can this info be added in the
>> mod_rewrite documentation, as this is very important for future questions?
>>
>
> It's already there, see :
> http://httpd.apache.org/docs/2.2/env.html
> Some Caveats

Added similar text to SetEnv today.

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Apache on F11. ANY APPROACH ?excluding images pdfs etc from Https ( ssl ) routing