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Phil_Lawrence_7's avatar
Phil_Lawrence_7
Icon for Nimbostratus rankNimbostratus
Nov 11, 2011

Irule to redirect based on host and uri - lowercase issue

Hi

 

 

We are using BigIP v9.x

 

 

Im new to irules and I have done some searching on this forum and from the examples I've found ive managed to write the following (which works)

 

 

when HTTP_REQUEST { if {[HTTP::host] == "wibble.com" and [HTTP::uri] contains "&lang=Anon&country=Anon"}{

 

if {[scan [HTTP::uri] "/livelink/livelink.exe?func=ll&objid=%d&objAction=%s" dnum action] == 2} {

 

HTTP::redirect "http://wibble.com/otcs/livelink.exe?func=LL.login&username=Myuserid&password=XYZ&NextURL=%2Fotcs%2Flivelink%2Eexe%3Ffunc%3Dll%26objId%3D$dnum%26objAction%3D$action"

 

}

 

}

 

}

 

 

the logic behind this is .....

 

 

original url

 

http://wibble.com/livelink/livelink...untry=Anon

 

 

 

redirect all trafffic from http://wibble.com that has "&lang=Anon&country=Anon" in the url

 

 

Put the numeric value after objid= into a variable dnum and the word after objaction and before the & into a variable called action

 

 

this works, however the action variable contains the rest of the URI, which whilst not ideal is working for us.

 

 

I have found an error where if someone puts the url in a different case, it fails ... so I've been trying to use the tolower command, but I get an error saying that tolower is not a valid maths function

 

 

 

when HTTP_REQUEST {

 

if {tolower([HTTP::host]) == "wibble.com" and tolower([HTTP::uri]) contains "&lang=anon&country=anon"}{

 

if {[scan [HTTP::uri] "/livelink/livelink.exe?func=ll&objid=%d&objAction=%s" dnum action] == 2} {

 

HTTP::redirect "http://wibble.com/otcs/livelink.exe?func=LL.login&username=Myusername&password=XYZ&NextURL=%2Fotcs%2Flivelink%2Eexe%3Ffunc%3Dll%26objId%3D$dnum%26objAction%3D$action" } } }

 

 

 

once this is working I can then do the next section which is dependant on if the objaction in the url = open, do one redirect, else do another ... however this now seems very long and a little unweildy

 

 

when HTTP_REQUEST {

 

if {tolower([HTTP::host]) == "ecm.express.tnt" and tolower([HTTP::uri]) contains "&lang=anon&country=anon"}{

 

if {tolower([HTTP::uri]) contains "objaction=open"}{

 

if {[scan [HTTP::uri] "/livelink/livelink.exe?func=ll&objid=%d&objAction=%s" dnum action] == 2} {

 

HTTP::redirect "http://ecm.express.tnt/otcs/livelink.exe?func=LL.login&username=Anonymous&password=&NextURL=%2Fotcs%2Flivelink%2Eexe%3Ffunc%3Ddoc%2Efetch%26nodeid%3D$dnum"

 

}

 

} else if {[scan [HTTP::uri] "/livelink/livelink.exe?func=ll&objid=%d&objAction=%s" dnum action] == 2} {

 

HTTP::redirect "http://ecm.express.tnt/otcs/livelink.exe?func=LL.login&username=Anonymous&password=&NextURL=%2Fotcs%2Flivelink%2Eexe%3Ffunc%3Dll%26objId%3D$dnum%26objAction%3D$action"

 

}

 

}

 

}

 

 

any advice would be welcomed

 

 

Thanks in Advance

 

Phil
application delivery
dev
devops
iRules
  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Nov 11, 2011
    not sure if i read your rule correctly or not. please feel free to revise. 

    [root@ve1023:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.65.152:http
   ip protocol tcp
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}
[root@ve1023:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
   set http_uri [string tolower [HTTP::uri]]
   if {[string tolower [HTTP::host]] equals "ecm.express.tnt"} {
      if {$http_uri ends_with "&lang=anon&country=anon"} {
         set dnum [URI::query $http_uri "objid"]
         set action [URI::query $http_uri "objaction"]
         if {$action equals "open" and $dnum ne ""} {
            HTTP::redirect "http://ecm.express.tnt/otcs/livelink.exe?func=LL.login&username=Anonymous&password=&NextURL=%2Fotcs%2Flivelink%2Eexe%3Ffunc%3Ddoc%2Efetch%26nodeid%3D$dnum"
         } else {
             do something else
         }
      }
   }
}
}

[root@ve1023:Active] config  curl -I "http://ecm.express.tnt/livelink/livelink.exe?func=ll&objid=149998544&objAction=open&lang=Anon&country=Anon"
HTTP/1.0 302 Found
Location: http://ecm.express.tnt/otcs/livelink.exe?func=LL.login&username=Anonymous&password=&NextURL=%2Fotcs%2Flivelink%2Eexe%3Ffunc%3Ddoc%2Efetch%26nodeid%3D149998544
Server: BigIP
Connection: Keep-Alive
Content-Length: 0
  • Kurt_Knochner_5's avatar
    Kurt_Knochner_5
    Icon for Cirrus rankCirrus
    Nov 11, 2011
    Hi,

     

     

    please try this: [string tolower [HTTP::host]] and [string tolower [HTTP::uri]].

     

     

    Regards

     

    Kurt Knochner
  • Phil_Lawrence_7's avatar
    Phil_Lawrence_7
    Icon for Nimbostratus rankNimbostratus
    Nov 11, 2011
    thank you both for taking the time to help

     

     

    I wont be able to test until monday, but that irule looks sooooo much cleaner :D

     

     

    im assuming the ne in ($dnum ne "") is "not equal to"

     

     

    Thanks again

     

    Phil
  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Nov 11, 2011
    im assuming the ne in ($dnum ne "") is "not equal to" yes, it is.