Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

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 a...
application delivery
dev
devops
irules
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