Forum Discussion

Wil_Schultz_101's avatar
Wil_Schultz_101
Icon for Nimbostratus rankNimbostratus
Feb 12, 2007

How can I grab an HTTP header on CACHE_REQUEST?

I'm trying to grab [HTTP::header "Content-Length"] to use during CACHE_REQUEST so I can make sure the BigIP does not cache blank pages. I've tried to set a global variable during HTTP::Response and no...
application delivery
dev
devops
iRules
Wil_Schultz_101's avatar
Wil_Schultz_101
Icon for Nimbostratus rankNimbostratus
Feb 15, 2007
edit: I should note that I changed the min size to 1000 and rebooted last night...

Well, that irule isn't valid in its current form. So I changed to:


when HTTP_REQUEST {
 set ::uri [string tolower [HTTP::uri]]
 
}
when HTTP_RESPONSE {
 set ::size [HTTP::header "Content-Length"]
 log local0.$::size
 if { $::uri contains "/blank.htm" } {
  log "Got blank.html of apparent length $::size"
 }
}

And receive the following logs:


Feb 15 11:54:27 tmm tmm[1013]: 01220002:6: Rule demo.my.com : local0.0
Feb 15 11:54:27 tmm tmm[1013]: 01220002:6: Rule demo.my.com : Got blank.html of apparent length 0
Feb 15 11:54:27 tmm tmm[1013]: 01220002:6: Rule demo.my.com : local0.
Feb 15 11:54:27 tmm tmm[1013]: 01220002:6: Rule demo.my.com : Got blank.html of apparent length 
Feb 15 11:54:28 tmm tmm[1013]: 01220002: repeated 2 times
Feb 15 11:54:29 tmm tmm[1013]: 01220002:6: Rule demo.my.com : local0.0
Feb 15 11:54:29 tmm tmm[1013]: 01220002:6: Rule demo.my.com : Got blank.html of apparent length 0
Feb 15 11:54:29 tmm tmm[1013]: 01220002:6: Rule demo.my.com : local0.
Feb 15 11:54:31 tmm tmm[1013]: 01220002: repeated 15 times

And inside the bigip:


Profile www.my.com_profile
|   URI /blank.htm
|   Host demo.my.com
|   159 hits   Size 202
|   Received 2007-02-15 11:54:29   Last sent 2007-02-15 11:57:25
|   Expires 1969-12-31 16:00:00   Vary none   Vary count 1