NimbostratusGood evening all,
I am looking for a way to do a "one time" trigger within an iRule.
Scenario:
User accesses site and if the html text "banana" is seen, log something, insert something do something but just once for this session. If someone could point me in the direction on how to set a constant variable that lasts for the duration of the session, I think that would work.
Thanks!
NacreousAll variables have scope of TCP session. Or do you mean users browser session? You could add in a session cookie to help you with that.
Also when you say 'html text "banana"' do you mean if you see the word 'banana' in the content of an HTTP response?
A bit more info and we can give you some code to illustrate.....
NacreousCreate a stream profile str_banana that looks for string 'banana', then attach an iRule as follows;-
when STREAM_MATCHED {
if {![HTTP::cookie exists 'banana']} {
Insert session cookie
HTTP::cookie insert name 'banana' value "1"
HTTP::cookie httponly 'banana' enable
log local0. "Banana seen for this session"
}
STREAM::disable
}
NimbostratusSorry if my requirements weren't clear. My use case wasn't the greatest. I'm simply trying to track within the Big-IP when a specific criteria is met, carry out action X and don't do it again for the duration of the users session. Unfortunately setting a cookie on the clients end is not an option. Doing further research, would setting the value in the session table work?
Something like this
when HTTP_REQUEST {
if { [table -subtable lookup [IP::client_addr] [HTTP::host]] !=""} {
return
}elseif { ([HTTP::header value host] contains "web.company.com")} {
log local0. "Criteria met for [IP::client_addr] for [HTTP::header value host] in request"
table set -subtable [IP::client_addr] [HTTP::host]
}
}
when CLIENT_CLOSED {
table delete -subtable [IP::client_addr]
}
NimbostratusI don't think my syntax is correct though...
NacreousDo you mean browser session or TCP connection? If the latter then very easy as all variables are scoped for TCP session;-
when STREAM_MATCHED {
if {![info exists fBananaSeen]} {
Set variable
set BananaSeen 1
log local0. "Banana seen for this TCP connection"
}
STREAM::disable
}
No need to delete anything when connection closes as variable automatically cleared.