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Robert_47833's avatar
Robert_47833
Icon for Altostratus rankAltostratus
Mar 21, 2015

irule VS http profille

I have one interesting question which confuse me a lot today since I learn something new in BIGIP. My questions are: 1:If I removed one header in HTTP profile,but add same header back in irule,...
application delivery
devops
iRules
LTM
  • he_qiang_137361's avatar
    he_qiang_137361
    Mar 21, 2015

    I give it a test:

    root@(bigip1)(cfg-sync Standalone)(Active)(/Common)(tmos) list ltm profile http customer_http 
ltm profile http customer_http {
    app-service none
    defaults-from http
    header-erase Headertest
    proxy-type reverse
}

root@(bigip1)(cfg-sync Standalone)(Active)(/Common)(tmos) list ltm rule http_header_test 
ltm rule http_header_test {
    when HTTP_REQUEST {
        HTTP::header insert "Headertest" "123"
}

    }

    Then test with curl 10.1.1.73 -H "Headertest: 123", from the capture it shows http header Headertest still in the request.

he_qiang_137361's avatar
he_qiang_137361
Historic F5 Account
Mar 22, 2015

Hi Robbie,

You can modify the iRule as below:

when HTTP_REQUEST {
   if {[HTTP::header exists Accept-Encoding] and [string tolower [HTTP::uri]] contains "/xyz" } {
      HTTP::header replace Accept-Encoding shdc
   }
}

It'll replace the header if the URI contains /xyz.