How to make a branch decsision based on HTTP header in an Access Policy?

Hi,

HTTP Host header is already provisioned in a Access variable:

session.server.network.name

You van use this branch expression:

expr { [mcget {session.server.network.name}] == "foo.example.com" }

if you want to collect another HTTP header, don't use iRule Event but this irule code:

when ACCESS_SESSION_STARTED {
    ACCESS::session data set session.custom.myHeader [HTTP::header myHeader]
}

This ACCESS_SESSION_STARTED raise just before Access session redirect to /my.policy

This event is the best time to catch first request content (HTTP headers, URI, query string, HTTP Method, ...)