client authentication (request) & irule

Look at this code, it manage certificate client auth and display the CN of the user.

As you can see, HTTP_REQUEST event is not evaluated after Client cert auth.

when CLIENTSSL_CLIENTCERT {
    if {[SSL::cert count] < 1}{
        reject 
    } else {
        HTTP::release
        array set subject [ split [string map {"\\," "," " , " "|" ", " "|" " ," "|" "," "|" "\\=" "=" " = " "|" "= " "|" " =" "|" "=" "|"} [X509::subject [SSL::cert 0]]] "|"]; 
    }
}

when HTTP_REQUEST {
     Check authentication mode selected in previous HTTP_REQUEST event
    if { [SSL::cert count] == 0 } {
     if there is no client certificate hold the HTTP request till the SSL re-negotiation is done.
        HTTP::collect
        SSL::session invalidate
        SSL::authenticate always
        SSL::authenticate depth 9
        SSL::cert mode require
        SSL::renegotiate
        set request_headers [HTTP::request]
    } else {
         This code is not evaluated during the first request asking for authentication
        log local0. "Subject : $subject(CN)"
        HTTP::respond 200 content "
                    Authenticated
                
                    You are authenticated successfuly : $subject(CN)
                
                
            " noserver
    }
}
when HTTP_REQUEST_RELEASE {
    if { [info exists subject] } {
        log local0. "Subject : $subject(CN)"
        HTTP::respond 200 content "
                    Authenticated
                
                    You are authenticated successfuly : $subject(CN)
                
                
            " noserver
    }
}