How to redirect or change content in an iFrame

i have a similar scenario.. So we have a web app that we don’t want users to get to the login ‎page.. the app should only be accessible through primary portal.. so ‎the main portal will send the following URL/URI through – ‎ ‎ ‎ https://www.secondary.com/app/index.aspx?authid={session-token} ‎

‎The use case I am trying to solve for is if a user enters the following – ‎ ‎ ‎

https://www.secondary.com/app/index.aspx?authid=

or

https://www.secondary.com/app/index.aspx?authid={start-typing-stuff}‎ ‎ ‎

this directs to a page with iframes.. top and side and body.. I found a URI ‎request going to a specific path that causes it but when I redirect with ‎the iRule, the iframe body gets redirects and not the whole page..

the current irule i have is this -

when HTTP_REQUEST {
    if {([string tolower [HTTP::uri]] starts_with "/app/index.aspx") and not ([string tolower [HTTP::uri]] contains "authid")}{
        HTTP::redirect "https://www.primary.com"
        }
    if {[string tolower [HTTP::uri]] starts_with "/app/engine/login.aspx"}{
        HTTP::redirect "https://www.primary.com"
        }   
    }

when i do that, the top and side frames remain with the secondary formating and the body gets redirected..