Hi Yehuda, Thanks for your answer and... yep, I can't change the 'destination' server. Nevertheless this is an interesting answer, because it is first one near the solution I was looking for.
Anyway, may be there is a problem with the order of execution. I mean, as far as I read, this solution is based on an apache "load balancer" feature and I'm not sure we can define the order wherewith origin and destination servers will be used. I must execute the first request on 'destination' server and, only if the resource is not found, I could try with 'origin'. Just for sake of curiosity I'll try to implement it in my test env. Thanks again for your answer, Vincenzo 2013/5/21 Yehuda Katz <yeh...@ymkatz.net> > 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 >> >> >> > -- Vincenzo D'Amore email: v.dam...@gmail.com skype: free.dev mobile: +39 349 8513251
