On Tuesday 24 June 2008 09:22:47 André Warnier wrote: > Hi. > > I'm not a specialist of that kind of thing, but I'm curious and I just > wonder about the following kind of scenario : > > - In the proxy server, unset the Accept-encoding header, but set another > non-standard one (or an environment value) that will not be recognised > by the back-end server > - condition the SetOutputFilter DEFLATE by this other header/value > - do the proxying. Hm. I think the check for the Accept-encoding header is hard-coded in mod_deflate. No matter if I SetOutputFilter DEFLATE conditionally or unconditionally, the filter won't compress the output as soon as I unset the Accept-encoding header. > The back-end server will not get the Accept-encoding > header. Instead it will get the new header you set, but will not react > to it, so not do compression. > - but the front-end server still will > I think that mod_sentenvif and/or mod_rewrite should allow you to do the > above. Someone else would have to give you the specifics though. > > André > > Rainer Sabelka wrote: > > Hi, > > > > I try to use apache (version 2.2.8 on Ubuntu 8.04) for compression > > offloading. What I want to do: > > - use mod_proxy to forward all requests to the application server > > - use mod_deflate to compress the output > > - remove the "Accept-Encondig:" header from the client's request before > > sending it to the application server to avoid that the compression is > > done there. > > > > My frist approach didn't work: > > > > <VirtualHost *:80> > > ServerName www.example.com > > <Proxy *> > > Order deny,allow > > Allow from all > > </Proxy> > > ProxyRequests Off > > ProxyPass / http://realserver:80/ > > ProxyPreserveHost on > > RequestHeader unset Accept-Encoding > > SetOutputFilter DEFLATE > > </VirtualHost> > > > > The problem with this approach: when I use "RequestHeader unset Accept- > > Encoding" then the application server gives me uncompressed output (good) > > but also mod_deflate won't comress the output (bad). > > > > So, this is my second approch, which actually works, but I think is a bit > > an over-kill: > > > > <VirtualHost *:80> > > ServerName www.example.com > > <Proxy *> > > Order deny,allow > > Allow from all > > </Proxy> > > ProxyRequests Off > > ProxyPass / http://localhost:8000/ > > ProxyPreserveHost on > > RequestHeader unset Accept-Encoding > > SetOutputFilter DEFLATE > > </VirtualHost> > > > > <VirtualHost localhost:8000> > > ServerName www.example.com > > <Proxy *> > > Order deny,allow > > Allow from all > > </Proxy> > > ProxyRequests Off > > ProxyPass / http://realserver:80/ > > ProxyPreserveHost on > > RequestHeader unset Accept-Encoding > > </VirtualHost> > > > > Here I have 2 instances of apache in proxy-mode connected in series. The > > first one forwards the request to the second one and does the compression > > of the output. The second instance just removes the Accept-Encoding > > header before it forwards the request to the application server. > > > > But I think there must be a an easier solution. Has any body an idea how > > to get this working with only a single instance of apache? > > > > Thanks, > > -Rainer > > > > --------------------------------------------------------------------- > > The official User-To-User support forum of the Apache HTTP Server > > Project. See <URL:http://httpd.apache.org/userslist.html> for more info. > > To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx > > " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx > > For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx > > --------------------------------------------------------------------- > The official User-To-User support forum of the Apache HTTP Server Project. > See <URL:http://httpd.apache.org/userslist.html> for more info. > To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx > " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx > For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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