Hello! On Thu, Mar 27, 2014 at 03:01:22PM +0530, Makailol Charls wrote:
> Hi Maxim, > > Apart from passing cache status to backend, would it be possible to send > some other headers which are stored in cache? > > For example, If backed sets header "Foo : Bar" , which is stored in cache. > Now when cache is expired , request will be sent to backend. At that time > can we send the value of Foo header stored in cache to upstream backend? > > I tried to achieve this with below code but it could not work. > proxy_set_header Foo $upstream_http_Foo; > > Would you suggest me how to achieve this or what am I doing wrong here. This is not something possible. > > Thanks, > Makailol > > > > > On Thu, Mar 20, 2014 at 6:56 PM, Maxim Dounin <[email protected]> wrote: > > > Hello! > > > > On Thu, Mar 20, 2014 at 09:38:40AM +0530, Makailol Charls wrote: > > > > > Hi, > > > > > > Is there some way to achieve this? I want to pass requests to backend > > based > > > on cache status condition. > > > > This is not something easily possible, as cache status is only > > known after we started processing proxy_pass and already know > > which backend will be used. (Note that by default proxy_cache_key > > uses $proxy_host, which wouldn't be known otherwise.) > > > > If you want to check BYPASS as in your previous message, I would > > recommend checking relevant conditions from proxy_cache_bypass > > separately. As a more generic though less effective aproach, an > > additional proxy layer may be used. > > > > -- > > Maxim Dounin > > http://nginx.org/ > > > > _______________________________________________ > > nginx mailing list > > [email protected] > > http://mailman.nginx.org/mailman/listinfo/nginx > > > _______________________________________________ > nginx mailing list > [email protected] > http://mailman.nginx.org/mailman/listinfo/nginx -- Maxim Dounin http://nginx.org/ _______________________________________________ nginx mailing list [email protected] http://mailman.nginx.org/mailman/listinfo/nginx
