Your question looks similar to this StackOverflow question:
http://serverfault.com/questions/83099/apache2-mod-proxy-w-multiple-reverse-proxies
I am guessing from your question that you can't even change that much on
the 'destination' server.
I have also looked for a way to do this and come up empty.
- Y
On Tue, May 21, 2013 at 4:17 AM, Vincenzo D'Amore <v.dam...@gmail.com>wrote:
> Hi all,
>
> I'm moving a big directory of images from an HTTP server to another and I
> cannot change any configuration. I would like my users don't even suppose
> there is a moving in progress. So I thought to add a new Apache httpd
> server 2.2 configured as reverse proxy in front of both of those servers.
>
> Let me say, we can call those servers 'origin' and 'destination'.
>
> Apache when a resource does not exists in the destination should try to
> get it in the origin server.
> I suppose to do this check, I mean if the resource exist or not in
> 'destination' server, using mod_rewrite, I mean RewriteCond -U option.
>
> Actually my tentative has failed, it seems impossible check the existence
> of external resource using only standard apache 2.2 directives.
> This is my tentative:
>
> RewriteCond %{IS_SUBREQ} true
> RewriteCond %{REQUEST_FILENAME} ^/destination
> RewriteRule . http://destination-server%{REQUEST_FILENAME} [P,L]
>
> # Check "destination" requests
> RewriteCond %{IS_SUBREQ} false
> RewriteCond "/destination%{REQUEST_FILENAME}" -U
> RewriteRule . http://destination-server%{REQUEST_FILENAME} [P,L]
>
> RewriteCond %{IS_SUBREQ} false
> RewriteRule . http://origin-server%{REQUEST_URI} [P,L]
>
>
> Is there any way to do this using mod_rewrite or some standard Apache
> httpd module?
>
> Ciao,
> Vincenzo
>
>
>
