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nathe's avatar
nathe
Icon for Cirrocumulus rankCirrocumulus
Oct 21, 2011

Redirect Based on Content

  Hello all. Hope you can help. Not new to f5 but new to writing my own iRules.     Scenario: I want to redirect a user to an error page if a certain line of text is returned in the html bod...
application delivery
dev
devops
iRules
nitass's avatar
nitass
Icon for Employee rankEmployee
Oct 21, 2011
is response encoded or does it span multiple packet? 

[root@iris:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.17.33:http
   ip protocol tcp
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}

[root@iris:Active] config  b rule myrule list
rule myrule {
   when HTTP_RESPONSE {
        set collect_length 2048

        if {[HTTP::header Content-Length] eq ""}{
                set collect_length $collect_length
        } elseif {[HTTP::header Content-Length] == 0}{
                unset collect_length
        } elseif {[HTTP::header Content-Length] > $collect_length}{
                set collect_length $collect_length
        } else {
                set collect_length [HTTP::header Content-Length]
        }

        if {[info exists collect_length]}{
                HTTP::collect $collect_length
        }
}

when HTTP_RESPONSE_DATA {
        if { [HTTP::payload] contains "Microsoft OLE DB Provider for SQL Server error"}{
                log local0. "found OLE DB Error in response"
                HTTP::redirect http://www.domain.com/error.asp
        }
}
}

[root@iris:Active] config  curl -i http://10.10.70.110/foo.html
HTTP/1.1 200 OK
Date: Fri, 21 Oct 2011 06:27:51 GMT
Server: Apache/2.0.59 (rPath)
Last-Modified: Fri, 21 Oct 2011 06:24:47 GMT
ETag: "66a9-80-213129c0"
Accept-Ranges: bytes
Content-Length: 128
Vary: Accept-Encoding
Set-Cookie: testcookie=helloworld
Content-Type: text/html; charset=UTF-8



WELCOME!!!!
This's 10.10.70.110.
Microsoft OLE DB Provider for SQL Server error



[root@iris:Active] config  curl -i http://172.28.17.33/foo.html
HTTP/1.0 302 Found
Location: http://www.domain.com/error.asp
Server: BigIP
Connection: Keep-Alive
Content-Length: 0