Good afternoon, I've got some questions about how to use 'redirect' or 'http-request redirect' to provide some functionality.
A little bit of background. I've got a COTS application that is accessed via given domain name, let's say http://blah.foo.com. Given that the COTS only supports a single language per instance, there are various instances installed on different ports in the back end, which use the first level of the path to specify the language, such that a client would go to http://blah.foo.com/fr for a French version of the site, and http://blah.foo.com/en for an English version. This is what's currently in place and the site works as expected. In the config below, there are a few other lines to allow for a shared image directory and splash page which allows for the selection of a language if one isn't already specified. We're to be upgrading the version of the COTS and at the same time, we're going to change the domain name to 'cots.foo.com', but we want to allow any legacy links stored on PCs, in bookmarks or in emails to still function. The new version natively support multiple languages, such that the '/en' and '/fr' path components are no longer needed, and can simply be replaced with a single base URL, '/app'. I'd like to redirect the users to the new URL, so that no matter what they clicked, when they look in the address bar, they see the new URL. To summarize, I'd like the following: http://blah.foo.com/en/folder/path/918374 or http://blah.foo.com/fr/folder/path/918374 http://blah.foo.com/en/file?function=index or http://blah.foo.com/fr/file?function=index To be redirected to http://cots.foo.com/app/folder/path/918374 http://cots.foo.com/app/file?function=index My first thought was to use the 'redirect' directive, but that wouldn't allow for the change in path. I then saw that I can possibly use 'http-request redirect', but it's really not clear how I would extract the various components of the path (anything after the second slash) for use in the newly built URL. The example at the very bottom of the docs section for 'redirect' is very interesting to me: http-request redirect code 301 location www.%[hdr(host)]%[req.uri] unless { hdr_beg(host) -i www } >From what I can gather from that line, I might be able to do something like the following to change the domain name, but even then there's no way to strip out the path components I need: http-request redirect code 301 location http://cots.foo.com/%[capture.req.uri] if { hdr(host) -i blah.foo.com } I could transparently accept the old URLs and simply 'reqrep' them to the backend, but I'd really rather not since that would keep the old URL's fully active instead of redirecting them as I'd like to do. If I'm way off in trying to do this on the load-balancer, then let me know so I can try and find a solution elsewhere. Thank you. For reference here's a copy of my current config file. # ---- Global Config ---- #Setup the global config global crt-base /path/to/certs daemon group nobody log /dev/log local0 maxconn 100000 nbproc 1 user haproxy spread-checks 5 stats socket /path/to/socket/haproxy.sock mode 600 level admin stats timeout 5m tune.ssl.default-dh-param 2048 # ---- Defaults ---- #Set some defaults defaults balance roundrobin compression algo gzip compression type application/javascript application/json text/css text/html text/plain text/xml maxconn 50000 mode http option abortonclose option contstats option httplog option redispatch timeout connect 15s timeout client 30s timeout server 30s default-server weight 100 inter 30s fastinter 5s downinter 1m # ------------------------------------------------------------------------ --- # Listen # ------------------------------------------------------------------------ --- # ---- STATS ---- listen LI-Stats bind 12.23.56.78:8888 ssl crt /path/to/certs/cert.pem mode http log global stats enable stats refresh 60 stats show-legends stats show-node stats auth un:pw stats admin if TRUE # ------------------------------------------------------------------------ --- # Frontends # ------------------------------------------------------------------------ --- # ---- HTTPS - Shared ----- # Frontend to support shared HTTPS connections frontend LI-HTTPS-Shared # Options log /dev/log local1 mode http option httplog option forwardfor # Bind to the port and use the cert specified bind 12.34.56.11:443 ssl crt /path/to/certs/cert-https.pem bind 12.34.56.11:80 # Options maxconn 50000 # -- ACLs -- acl url-path_blah_splash path / acl url-path_blah_splash path_beg -i /images /css acl url-path_blah_en path_beg -i /en acl url-path_blah_fr path_beg -i /fr acl url-path_blah_img path_beg -i /img acl hdr-host_blah hdr(host) -i blah.foo.com # -- Redirects -- # - Global SSL Redirector - redirect scheme https if !{ ssl_fc } # -- Backend Selection -- use_backend BE-Blah-En if hdr-host_blah url-path_blah_en use_backend BE-Blah-Fr if hdr-host_blah url-path_blah_fr use_backend BE-Blah-Splash if hdr-host_blah url-path_blah_splash use_backend BE-Blah-Img if hdr-host_blah url-path_blah_img # ------------------------------------------------------------------------ --- # Backends # ------------------------------------------------------------------------ --- backend BE-Blah-Splash # Define some options balance leastconn log /dev/log local3 mode http option httplog option httpchk /img/login.gif option httpclose #Active Servers default-server inter 10s downinter 1m weight 100 server server1 12.34.56.22:81 check server server2 12.34.56.33:81 check backend BE-Blah-Img # Define some options balance roundrobin log /dev/log local3 mode http option httplog option httpchk /img/login.gif option httpclose #Active Servers default-server inter 10s downinter 1m weight 100 server server1-en 12.34.56.22:82 check server server1-fr 12.34.56.22:84 check server server2-en 12.34.56.33:82 check server server2-fr 12.34.56.33:84 check backend BE-Blah-En # Define some options balance leastconn log /dev/log local3 mode http option httplog http-check expect status 200 option httpchk GET /ServiceCheck/check.aspx?service=english_service appsession appCookie len 30 timeout 1d request-learn option prefer-last-server option http-keep-alive #Active Servers default-server inter 10s downinter 1m weight 100 server server1-en 12.34.56.22:82 check server server2-en 12.34.56.33:82 check backend BE-Blah-Fr # Define some options balance leastconn log /dev/log local3 mode http option httplog http-check expect status 200 option httpchk GET /ServiceCheck/check.aspx?service=french_service appsession appCookie len 30 timeout 1d request-learn option prefer-last-server option http-keep-alive #Active Servers default-server inter 10s downinter 1m weight 100 server server1-fr 12.34.56.22:84 check server server2-fr 12.34.56.33:84 check
