Irule insert html attribute, APM

So sorry. I didn't give you the right code. Try this. should work better.

when HTTP_REQUEST {
    if { [string tolower [HTTP::uri]] contains "/Whatever/You/Are/Looking/For" } {
         Remove the Accept-Encoding header so that the server will not compress the response 
           (otherwise the stream rewriter won't work, since it doesn't decompress the stream)
        HTTP::header remove "Accept-Encoding"

         Set a variable so we know to do custom stream rewrite
        set strReplace 1

         Disable the default stream profile so we can modify it on response
        STREAM::disable
    }
}

when HTTP_RESPONSE {
    if { [info exists strReplace] && $strReplace && [HTTP::header "Content-Type"] contains "html" } {

         Look for any form tags
        set expr {@]*>@@}
        STREAM::expression $expr

         Enable the stream profile
        STREAM::enable
    }
}

when STREAM_MATCHED {
     Log the match that was found
    log local0. "    Match: '[STREAM::match]'"

     Manual replacement to add the action attribute (since we couldn't check in expression)
    if { not ([STREAM::match] contains "action=") } {
        STREAM::replace [string map {"