Forum Discussion

Ralph_David_201's avatar
Ralph_David_201
Icon for Nimbostratus rankNimbostratus
Dec 25, 2017

URI to lower case LTM irule issue

Hi Team, I have a challenge to redirect all uri into lower case. I am able to redirect the URL to lower case but if i type in e.g myweb.net/fR/PAges/DEfauLT.aspx etc it does not redirect to lower c...
application delivery
ASM Advanced WAF
cloud
nitass's avatar
nitass
Icon for Employee rankEmployee
Dec 25, 2017

Redirection should be on F5 side for client requests with Upper case URI to Lower case URI.

e.g.

// config

[root@ve13a:Active:In Sync] config  tmsh list ltm virtual bar
ltm virtual bar {
    destination 172.28.24.10:80
    ip-protocol tcp
    mask 255.255.255.255
    pool foo
    profiles {
        http { }
        tcp { }
    }
    rules {
        qux
    }
    source 0.0.0.0/0
    source-address-translation {
        type automap
    }
    translate-address enabled
    translate-port enabled
    vs-index 3
}
[root@ve13a:Active:In Sync] config  tmsh list ltm rule qux
ltm rule qux {
when HTTP_REQUEST {
  if { [HTTP::uri] ne [string tolower [HTTP::uri]] } {
    HTTP::respond 301 noserver Location http://[HTTP::host][string tolower [HTTP::uri]]
  }
}
}

// test

[root@ve13a:Active:In Sync] config  curl -I http://172.28.24.10/fR/PAges/DEfauLT.aspx
HTTP/1.0 301 Moved Permanently
Location: http://172.28.24.10/fr/pages/default.aspx
Connection: Keep-Alive
Content-Length: 0

[root@ve13a:Active:In Sync] config  curl -I http://172.28.24.10/fr/pages/default.aspx
HTTP/1.1 404 Not Found
Date: Mon, 25 Dec 2017 08:53:27 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Fri, 15 Apr 2016 03:55:49 GMT
ETag: "418e44-6a-fc825b40"
Accept-Ranges: bytes
Content-Length: 106
Content-Type: text/html; charset=UTF-8
Stanislas_Piro2's avatar
Stanislas_Piro2
Icon for Cumulonimbus rankCumulonimbus
Dec 25, 2017

I always recommend path-relative absolute URLs when destination page is on the same service as the current page:

when HTTP_REQUEST {
  if { [HTTP::uri] ne [string tolower [HTTP::uri]] } {
    HTTP::respond 301 noserver Location [string tolower [HTTP::uri]]
  }
}

the problem when working with absolute URLs is when a reverse proxy is configured in front of the server with another hostname or scheme, rewriting is required.