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John45_41805's avatar
John45_41805
Icon for Nimbostratus rankNimbostratus
Nov 10, 2011

Using if HTTP::header value Content-Type contains "text"

When I choose something as my content type...lets call it ..johnsname

 

 

do i have to define johnsname in the F5 or assuming I know my header info it will be detected by the F5 automatically and read it and perform the filter i apply..

 

 

 

basically I want to confirm if i had the following code:

 

 

if {[HTTP::header value johnsname] not "default"}

 

 

 

Then I could assume the F5 would automatically read my header look for the assigned value of johnsname and as long as it wasn't default it would perform the actions i listed below that string ?

 

 

I'm brand new to iRules and want to make sure I have a clear understanding.

 

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  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Nov 10, 2011
    e.g. 

    [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 {
        if {[HTTP::header value johnsname] equals "default"} {
                log local0. "it is default"
        } else {
                log local0. "it is not default"
        }
}
}

[root@ve1023:Active] config  curl -I http://172.28.65.152/ -H "johnsname: default"
HTTP/1.1 200 OK
Date: Thu, 10 Nov 2011 16:31:32 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Tue, 08 Nov 2011 12:54:37 GMT
ETag: "4183c9-30-ac7cfd40"
Accept-Ranges: bytes
Content-Length: 48
Connection: close
Content-Type: text/html; charset=UTF-8

[root@ve1023:Active] config  curl -I http://172.28.65.152/ -H "johnsname: test"
HTTP/1.1 200 OK
Date: Thu, 10 Nov 2011 16:31:39 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Tue, 08 Nov 2011 12:54:37 GMT
ETag: "4183c9-30-ac7cfd40"
Accept-Ranges: bytes
Content-Length: 48
Connection: close
Content-Type: text/html; charset=UTF-8

[root@ve1023:Active] config  tail /var/log/ltm
Nov 10 08:31:18 local/tmm info tmm[4766]: Rule myrule : it is default
Nov 10 08:31:24 local/tmm info tmm[4766]: Rule myrule : it is not default
  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Nov 14, 2011
    Or you could use not or ! to negate the match: 

    
when HTTP_REQUEST {
   if { not ([HTTP::header value johnsname] equals "default")} {
      log local0. "it is not default"
   }
}

    Aaron