Separate Log for Robot Page Access

[Maxim Dounin]

Hello!

On Sat, Feb 06, 2010 at 12:31:41AM -0800, Wohbah wrote:

> 
> To record robots in another log I have a boolean $is_robot.  The variable is
> set correctly.  But I can't use it.  (nginx version 0.765-1)
> 
> Why can I do
> if ( ... ) { ... access_log  off; ... }
> but not
> if ( ... ) { ... access_log  /var/log/nginx/robots.log; ... }
> 
> When a robot visits, it gets error 500.  No web page.  Must I duplicate
> every location to change access_log settings?  Here is the topmost one:

Yes, once you want to do something different you have to create 
another location.  Directive "if" does this implicitly, but it 
fails to do it correctly in many cases.

>         location / {
>           access_log  /var/log/nginx/access.log;
>           
>           ...much stuff I do not like duplicating, several lines...
> 
>           if ( $is_robot ~ T ) {
>             access_log  /var/log/nginx/robots.log;
>           }
>           try_files /maintenance.html $uri.html @phptry ;
>         }

http://wiki.nginx.org/IfIsEvil

This won't work, see third example.

Maxim Dounin