how to change https header response using irule

hi chris,

last time I was succeed replace http header when user login : from https://10.251.227.1:8443/claritysso/login?service=http%3A%2F%2F10.251.227.1%3A8080%2Fj_spring_cas_security_check to https://10.251.227.231:8443/claritysso/login?service=http%3A%2F%2F10.251.227.231%3A8080%2Fj_spring_cas_security_check

but when user logout why the response still use ip in the pool ya? here is the result URL of logout : https://10.251.227.1:8443/claritysso/logout or https://10.251.227.2:8443/claritysso/logout

i'm expecting the result become : https://10.251.227.231:8443/claritysso/logout.

How to make the stream profile sticky when the user login until user logout ?