Hi Olivier, Thanks for your VERY INTERESTING question :-) Here's more: I activated debug logging and it really seems when proxying the request, nothing happens until the whole app server response is received by the reverse proxy. Here's the log when accessing a page that just waits 10 seconds. The mod_proxy sees that we are working with this specific virtual host, but not "the rest of apache"... [Wed Feb 07 17:36:18 2007] [debug] proxy_http.c(67): proxy: HTTP: canonicalising URL //internalappserver/veryslowpage [Wed Feb 07 17:36:18 2007] [debug] mod_proxy.c(454): Trying to run scheme_handler [Wed Feb 07 17:36:18 2007] [debug] proxy_http.c(1697): proxy: HTTP: serving URL http://internalappserver/veryslowpage [Wed Feb 07 17:36:18 2007] [debug] proxy_http.c(186): proxy: HTTP connecting http://internalappserver/veryslowpage to internalappserver:80 [Wed Feb 07 17:36:18 2007] [debug] proxy_util.c(1139): proxy: HTTP: fam 2 socket created to connect to internalappserver [Wed Feb 07 17:36:18 2007] [debug] proxy_http.c(336): proxy: socket is connected [Wed Feb 07 17:36:18 2007] [debug] proxy_http.c(370): proxy: connection complete to internalappserver:80 (internalappserver) [Wed Feb 07 17:36:18 2007] [debug] proxy_http.c(1531): proxy: start body send [Wed Feb 07 17:36:28 2007] [debug] proxy_http.c(1591): proxy: end body send It's only after 10 seconds that the virtual host name appears in the status page. I'm starting to understand this is a normal behaviour of "handlers" (one and then the other, then the next one...). But I keep thinking something's wrong... Or is it possible to change the order of handlers?? Olivier > -----Original Message----- > From: Chirouze Olivier > Sent: 07 February 2007 16:07 > To: 'users@xxxxxxxxxxxxxxxx' > Subject: Proxy & virtual host information [was: Status page: > reading state] > > Hi > > This is the following of an existing thread I originaly > posted, but I have more details. I will describe the problem > more precisely, hopping this time, someone will give some help ;-) > > Let say you have a very complicated page (or just a buggy app > :-) published on an app server (on local network). > > You access the app server through Apache running as a reverse > proxy, using a virtual host. > > Here's how my test config looks like: > > -------------------------------------------------------------- > ----------------- > <VirtualHost ip:80> > ServerName externalservername.com > > RewriteEngine on > > RewriteRule ^/(.*)$ http://internalappserver/veryslowpage > > ProxyRequests off > > </VirtualHost> > -------------------------------------------------------------- > ----------------- > > With this configuration, a call to > http://externalservername.com will work as expected, as the > request will be forwarded to > http://internalappserver/veryslowpage and you'll see a > process with "externalservername.com" as virtual host on the > status page, handled in less than a second (the connection > becomes free as soon as it has been forwarded to the app server). > > The thing is, the request will be _redirected_ to > http://internalappserver/veryslowpage (the user sees > http://internalappserver/veryslowpage in his address bar), > which is something we don't want for a "proper" reverse > proxy: we want the user to see only the reverse proxy. > > For that, you'll need to add the [P] flag at the end of the > RewriteRule line: > -------------------------------------------------------------- > ----------------- > RewriteRule ^/(.*)$ http://internalappserver/verybigdownload [P] > -------------------------------------------------------------- > ----------------- > > As far as I know that's what makes it being "proxied", > hidding the address of the actual app server. > > As soon as you activate this, Apache will keep a connection > open until the app server has finished sending response. This > seems perfectly normal to me. What I don't understand is: why > the hell is this connection on state "..reading..", with no > virtual host associated, all this time (until the app server is done)? > > This is not just something I'm wondering about, it something > that makes all modules working at the virtual host level > become useless :-( > > I'd love to find the "bug" and fix it myself... But I'd need > someone to point me to the right place... > > Olivier > > Olivier CHIROUZE > I&0 Infrastructure > Volvo Information Technology --------------------------------------------------------------------- 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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