Nginx rewrite rule for favicon.ico files

[Mark Alan]

On Fri, 31 Aug 2012 06:28:39 -0400 (EDT), "nexon"
<nginx-forum at nginx.us> wrote:
> Nginx rewrite rules for favicon.ico for multiple subdomains.
> 
> In nginx /etc/sites-avaliable/vhost_config_file, I have the following
> rewrite rules for serving multiple subdomains with their favicon.ico
> files:
> 
> 
> 
>     if ($host = example1.example.com){
>        rewrite ^/favicon.ico$ /favicon_example.ico break;
>      }
>     
>     if ($host = example2.example.com){
>        rewrite ^/favicon.ico$ /favicon_example.ico break;
>      }
>     
>     if ($host = example3.example.com){
>        rewrite ^/favicon.ico$ /favicon_example.ico break;
>      }
> 
> 
> Please, how can I make this simple operation by adding **ONE GENERAL
> REWRITE RULE**:
> 
> That rule must do:
> 
> 1.For subdomains example1,example2... to check in
> location /images/$host.ico is there a favicon_example.ico file and
> serve it.
> 
> 2.If there is no such file, than to serve just a plain favicon.ico
> file.

Would this help? [note: from memory, not tested]

location = /favicon.ico { 
  try_files /images/$server_name.ico /favicon.ico =204;
}

M.