http_log_module filter by status

[Maxim Dounin]

Hello!

On Tue, Jun 12, 2012 at 06:08:28PM -0400, B.R. wrote:

> The documentation <http://wiki.nginx.org/HttpCoreModule#error_page> also
> says that if you don't want to redirect to another page, you can use a
> named redirection :
> location / {
>   error_page 404 @404;
> }
> 
> location @404 {
>   access_log /path/to/log;
> }

This will cause another 404 as written.

Note well that named location are really needed only if you don't 
want *internal* redirect to happen, i.e. want to preserve original 
uri (e.g. for an additional processing as in various fallback 
schemes) and/or really can't touch uri namespace for some reason.

Maxim Dounin

> 
> The wiki syntax seems to be wrong though, since it is using brackets and
> not braces.
> ---
> *B. R.*
> 
> 
> On Tue, Jun 12, 2012 at 4:08 PM, Maxim Dounin <mdounin at mdounin.ru> wrote:
> 
> > Hello!
> >
> > On Sun, Jun 10, 2012 at 01:40:12PM -0400, karlseguin wrote:
> >
> > > I was interested in having nginx log 404s to their own file.
> > > Essentially, i _hate_ 404s, so I like to parse access logs find and
> > > report all 404s. However, as-is, parsing large access logs can be quite
> > > inefficient since 404s represent such a small % of the entire file. I
> > > was thinking nginx could filter it out at write-time:
> > >
> > > access_log  not_found.log  combined buffer=16K 404;
> > >
> > >
> > > Apologies for the lameness of the code, but this is what I came up
> > > with:
> > > https://gist.github.com/2906701
> > >
> > > I certainly don't recommend anyone uses it, I'm mostly just looking for
> > > feedback. Is this better off in its own module? (there's so much code in
> > > the http_log_module that I want to leverage though). There's much more
> > > filtering that could go on that perhaps a new directive is a better
> > > approach:
> > >
> > > access_log_filter $status /(40\d)/
> > > access_log_filter $method GET
> > >
> > > (which is certainly beyond my capabilities).
> > >
> > > Thoughts?
> >
> > error_page 404 /404.html;
> >
> > location = /404.html {
> >    access_log /path/to/log;
> > }
> >
> > Maxim Dounin
> >
> > _______________________________________________
> > nginx mailing list
> > nginx at nginx.org
> > http://mailman.nginx.org/mailman/listinfo/nginx
> >

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