How to redirect or change content in an iFrame

i tried the iRule you suggested above like this -

when HTTP_REQUEST {
    STREAM::disable
    HTTP::header remove "Accept-Encoding"
    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"}{
        set add_iframe_breaker 1
        HTTP::redirect "https://www.primary.com"
        }   
    }
when HTTP_RESPONSE {
    if { ( [info exists add_iframe_breaker] ) and ( [HTTP::header value Content-Type] contains "text" ) } {
        unset add_iframe_breaker
        STREAM::expression {@@ @}
        STREAM::enable
    }
}

without any success..