Irule insert html attribute, APM

Try this

when HTTP_REQUEST {
    set flag 0
    if { [HTTP::method] eq "GET" && "[HTTP::path]" contains "/url_with_POST/"
        } {
        set flag 1
        if { [HTTP::version] eq "1.1" } {
            if { [HTTP::header is_keepalive] } {
                HTTP::header replace "Connection" "Keep-Alive"
            }
            HTTP::version "1.0"
        }
    }
}

when HTTP_RESPONSE {
    if { $flag == 1 } {
        if { [HTTP::header exists "Content-Length"] and [HTTP::header "Content-Length"] <= 1048576 } {
           HTTP::collect [HTTP::header Content-Length]
        } else {
           HTTP::collect 1048576
        }
     }
}

when HTTP_RESPONSE_DATA {
    if { $flag == 1 } {
        set loc [string first {method="POST"} [HTTP::payload]];
        if { $loc > 0 } {
            HTTP::payload replace [expr $loc + 13] 0 { action="" }
        }
    }
    HTTP::release
}

Hmm still problem, should i replace "/url_with_POST/" with the url to my portal or to the application?

To the portal. May want to check the page source code, if action is inserted.

Another option would be to use a stream profile on the VIP, and do a custom replacement. Below is some code to help with that. You'll want to modify the HTTP_REQUEST check for the URI to whatever you're looking for. But this worked for me when I tested it.

Basically, it will have the profile find matches where there's a tag and then when it finds it, in the STREAM_MATCHED event, if there's no action attribute, it will add it.

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
    }
}

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

         Look for any form tags
        set expr {@]*>@@}

         Disable the stream profile so we can manually update it
        STREAM::disable
    }
}

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 {"

Im not really getting this, why do i want to disable the stream profile? How can i get a match then? I have placed debug messages and i pass both http respnse and http request, but not stream_matched

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 {"

It works, thanks alot :)