Forum Discussion
Sashi_81625
Nimbostratus
Nimbostratuscant read HTTP::payload
for the below iRule, the HTTP::payload is unreadable, can someone please point what might be going wrong?
LTM version: 10.0.1
when CLIENT_ACCEPTED {
set lookup 1
}
when HTTP_REQUEST {
if {$lookup == 1} {
set LB_request [HTTP::request]
HTTP::uri "/static/test.html"
}
}
when HTTP_RESPONSE {
if {$lookup == 1} {
if {[HTTP::header exists Content-Length] && ([HTTP::header Content-Length] < 2048)}{
set clength [HTTP::header Content-Length]
} else {
set clength 2048
}
HTTP::collect $clength
}
}
when HTTP_RESPONSE_DATA {
if {$lookup == 1} {
set lookup 0
set payload [HTTP::payload]
log local0. "Payload: $payload"
HTTP::release
HTTP::retry $LB_request
}
}
here is the output of ltm log
±ã²ÃHMLRÃ
ÃEÂ% %©¶J%©%úYÂeÂQ%;®ÂüäÃÃü½äüüìÃT[%'ÃÂÃllswitch : Payload: ÀÀÀÀÀÀ³Ã(ÃÃ
¢ÃÃ
äJ%.ÂR IúKRÂK@°-ÀÃuû*mÀÀÀ
- Is the payload encoded or encrypted somehow? What is it you're trying to accomplish?
Colin 
Sashi_81625trying to implement
http://devcentral.f5.com/Tutorials/TechTips/tabid/63/articleType/ArticleView/articleId/105/Conditioning-iRule-Logic-on-External-Information--01--HTTPretry.aspx
the request is on http, so i dont think payload is encrypted anywhere- There is no reason that I can think of that the LTM would be spitting out payload info like that if it's not somehow being munged from the back-end. Have you taken a trace of the data on the wire? I'd get a tcpdump directly from the BIG-IP as the traffic is coming in. The iRule seems to think that's the payload data it's being passed, so something is definitely wonky.
Colin - Sashi_81625seems like a similar issue has been reported for tcp::payload too
http://devcentral.f5.com/Community/GroupDetails/tabid/1082223/asg/50/afv/topic/aft/15665/aff/5/showtab/groupforums/Default.aspx
do you think i should open case with F5 for further analysis ? I am running out of ideas - I'd say opening a case is a good idea. It certainly isn't something you're doing with your iRule, that's pretty straight-forward. What does your Virtual config look like? Are you encrypting or compressing the traffic perhaps?
Colin - Sashi_81625Yes, the response that F5 gets is gzip-compressed... i updated the iRule with below lines, and that resolved the issue
if { [HTTP::header exists "Accept-Encoding"] } {
HTTP::header remove "Accept-Encoding"
}
