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Posted to modperl@perl.apache.org by Tofu Optimist <to...@yahoo.com> on 2003/09/02 22:02:16 UTC
Custom Log files Under MP2
I would like to append a small line of log information
to a file on certain apache2 requests. For this
application, I am very concerned about speed, so i'm
looking for fast simple solutions.
I could stuff the information in the error log as per
http://perl.apache.org/docs/2.0/api/Apache/Log.html,
and parse it out later off-line, but I'd prefer to
reserve the error log for errors.
I could stuff the information in the access log, and
likewise pull out the data later off-line: how might I
get data to the access_log?
The most natural place to append the information would
be a dedicated file. I've never written to a file
from mod_perl, and don't know the correct idiom
(flock? etc?) to do so.
I'd appreciate any pointers to recipes, modules, etc.
to show me the correct (fast, reliable) way to append
to a file under MP2.
Thanks!
:)
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Re: Custom Log files Under MP2
Posted by Stas Bekman <st...@stason.org>.
Tofu Optimist wrote:
> I would like to append a small line of log information
> to a file on certain apache2 requests. For this
> application, I am very concerned about speed, so i'm
> looking for fast simple solutions.
>
> I could stuff the information in the error log as per
> http://perl.apache.org/docs/2.0/api/Apache/Log.html,
> and parse it out later off-line, but I'd prefer to
> reserve the error log for errors.
>
> I could stuff the information in the access log, and
> likewise pull out the data later off-line: how might I
> get data to the access_log?
>
> The most natural place to append the information would
> be a dedicated file. I've never written to a file
> from mod_perl, and don't know the correct idiom
> (flock? etc?) to do so.
>
> I'd appreciate any pointers to recipes, modules, etc.
> to show me the correct (fast, reliable) way to append
> to a file under MP2.
You may want to spend some time with the mp2 docs first.
http://perl.apache.org/docs/2.0/user/
Your particular question is answered at these locations:
http://perl.apache.org/docs/2.0/user/handlers/http.html#PerlLogHandler
http://perl.apache.org/docs/2.0/user/handlers/server.html#Startup_Phases_Demonstration_Module
As for flocking, I prefer to do that, even though there are claims that short
writes are atomic. It's probably not the same on all io implementations.
__________________________________________________________________
Stas Bekman JAm_pH ------> Just Another mod_perl Hacker
http://stason.org/ mod_perl Guide ---> http://perl.apache.org
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Re: Custom Log files Under MP2
Posted by Geoffrey Young <ge...@modperlcookbook.org>.
Tofu Optimist wrote:
> Specifically,
> I'd like to log certain image file requests (all files
> with .jpg, .gif, and .png extensions) to a custom log,
>
> image_log, logging IP, file, time, status, bytes,
> referer, cookies, etc.
>
> I care about speed here.
>
> Would you suggest a native logging
> http://www.modperlcookbook.org/chapters/ch16.pdf
>
> or take this route
> http://perl.apache.org/docs/2.0/user/handlers/http.html#PerlLogHandler
native Apache routines, written in C, will always be faster, so if you can
get the same functionality from native routines use them. it's the
flexibility mod_perl offers that makes it special :)
>
> If the former, would you have any sample
> config code to illustrate?
I think the conditional logging recipe is pretty descriptive. see also the
CustomLog directive description in the apache documentation
http://httpd.apache.org/docs-2.0/mod/directives.html
FilesMatch might also help.
--Geoff
>
> Thanks!
>
> -TO
>
>
>
>
>
> --- Geoffrey Young <ge...@modperlcookbook.org> wrote:
>
>>
>>Tofu Optimist wrote:
>>
>>>I would like to append a small line of log
>>
>>information
>>
>>>to a file on certain apache2 requests. For this
>>>application, I am very concerned about speed, so
>>
>>i'm
>>
>>>looking for fast simple solutions.
>>
>>if speed is the concern, just stick to apache's
>>native logging mechanism.
>>
>>see recipe 16.5, "Conditional Logging" in the
>>mod_perl developer's cookbook:
>>
>>http://www.modperlcookbook.org/chapters/ch16.pdf
>>
>>in mod_perl 2.0, it's still $r->subprocess_env(),
>>but you need to load
>>APR::Table first.
>>
>>HTH
>>
>>--Geoff
>>
>>
>>
>>--
>>Reporting bugs: http://perl.apache.org/bugs/
>>Mail list info:
>>http://perl.apache.org/maillist/modperl.html
>>
>
>
>
> __________________________________
> Do you Yahoo!?
> Yahoo! SiteBuilder - Free, easy-to-use web site design software
> http://sitebuilder.yahoo.com
Re: Custom Log files Under MP2
Posted by Tofu Optimist <to...@yahoo.com>.
Specifically,
I'd like to log certain image file requests (all files
with .jpg, .gif, and .png extensions) to a custom log,
image_log, logging IP, file, time, status, bytes,
referer, cookies, etc.
I care about speed here.
Would you suggest a native logging
http://www.modperlcookbook.org/chapters/ch16.pdf
or take this route
http://perl.apache.org/docs/2.0/user/handlers/http.html#PerlLogHandler
If the former, would you have any sample
config code to illustrate?
Thanks!
-TO
--- Geoffrey Young <ge...@modperlcookbook.org> wrote:
>
>
> Tofu Optimist wrote:
> > I would like to append a small line of log
> information
> > to a file on certain apache2 requests. For this
> > application, I am very concerned about speed, so
> i'm
> > looking for fast simple solutions.
>
> if speed is the concern, just stick to apache's
> native logging mechanism.
>
> see recipe 16.5, "Conditional Logging" in the
> mod_perl developer's cookbook:
>
> http://www.modperlcookbook.org/chapters/ch16.pdf
>
> in mod_perl 2.0, it's still $r->subprocess_env(),
> but you need to load
> APR::Table first.
>
> HTH
>
> --Geoff
>
>
>
> --
> Reporting bugs: http://perl.apache.org/bugs/
> Mail list info:
> http://perl.apache.org/maillist/modperl.html
>
__________________________________
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Yahoo! SiteBuilder - Free, easy-to-use web site design software
http://sitebuilder.yahoo.com
Re: Custom Log files Under MP2
Posted by Geoffrey Young <ge...@modperlcookbook.org>.
Tofu Optimist wrote:
> I would like to append a small line of log information
> to a file on certain apache2 requests. For this
> application, I am very concerned about speed, so i'm
> looking for fast simple solutions.
if speed is the concern, just stick to apache's native logging mechanism.
see recipe 16.5, "Conditional Logging" in the mod_perl developer's cookbook:
http://www.modperlcookbook.org/chapters/ch16.pdf
in mod_perl 2.0, it's still $r->subprocess_env(), but you need to load
APR::Table first.
HTH
--Geoff
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Reporting bugs: http://perl.apache.org/bugs/
Mail list info: http://perl.apache.org/maillist/modperl.html