robots.txt rewrite for many second-level domains

[Igor Sysoev]

On Sun, Jan 06, 2008 at 09:34:28PM +0100, Martin Minka wrote:

> how to use "rewrite" and "set" in nginx to use different robots.txt for 
> different second-level domains.
> 
> My idea:
> if ($server_name ~* XXX) {
>    set secondlevel $2
> }
> rewrite ^/robots.txt$ /robots-$secondlevel.txt last;
> 
> Am I on the right way ? Could somebody help me with the regular 
> expresion XXX ?
> Or is there another way ?

First, it better to separate server on server level:

     server {
         ...
     }

     server {
         ...
     }

     server {
         ...
     }

However, if the servers are too common, then you should use:

     server {

         location = /robots.txt {
             if ($http_host ~* "^(one|two|three)\.domain\.com$") {
                 set      $secondlevel  $2;
                 rewrite  ^   /robots-$secondlevel.txt last;
             }

             root   ...;
         }



-- 
Igor Sysoev
http://sysoev.ru/en/