Hi Jeremy, On Fri, Jul 09, 2010 at 03:55:53PM -0600, Jeremy Hinegardner wrote: > I just want to make sure that this is the expected behavior: > > [r...@tt3 ~]# haproxy -v > HA-Proxy version 1.4.8 2010/06/16 > > And the snippet of a config showing the behavior. If the response from > the server is a 404, we want to change the status to 555. If the status > is 555 add a Location header: > > frontend main *:80 > default_backend site1 > > backend site1 > acl not_found status 404 > acl bizzare_status status 555 > > rspadd X-Wibble:\ bizzare if bizzare_status > rspadd X-Wibble:\ not_found if not_found > > rsprep ^HTTP/1.1\ 404\ (.*)$ HTTP/1.1\ 555\ Bizzare if not_found > > > server site1 127.0.0.1:81 check > > Curl session against a haproxy with the above config: > > % curl --verbose --silent http://tt3/foo.html > /dev/null > * About to connect() to tt3 port 80 (#0) > * Trying 10.10.12.17... connected > * Connected to tt3 (10.10.12.17) port 80 (#0) > > GET /foo.html HTTP/1.1 > > User-Agent: curl/7.20.0 (i386-apple-darwin10.3.0) libcurl/7.20.0 > OpenSSL/0.9.8n zlib/1.2.5 libidn/1.18 > > Host: tt3 > > Accept: */* > > > < HTTP/1.1 555 Bizzare > < Server: nginx/0.6.39 > < Date: Fri, 09 Jul 2010 21:36:54 GMT > < Content-Type: text/html > < Content-Length: 3653 > < Connection: close > < X-Wibble: bizzare > < > { [data not shown] > * Closing connection #0 > > What this appears to show, is that both of the status based ACL's are > satisfied at different times. That is, it appears that the following happens: > > - request sent to site1 and site1 response with a 404 > - at this point acl 'not_found' is true, which means that > acl 'bizzare_status' must be false > - rsprep changes the 404 response to a 555 > - rspadd adds 'X-Wibble: bizzare' header, which means that > acl 'bizzare_status' was true > > I'm okay with this, and can work with it. I just want to make sure that this > is the expected behavior.
Yes, I confirm this is how it works. reqadd/rspadd are processed last. That's the reason I'd like to add "inbound" and "outbound" processing, it would somewhat help for such border cases. Regards, Willy
