Help Replacing characters in URI(URL?)

What do you mean by "HTML equivalent"? Do you mean HTTP encoded, or HTML encoded. The two are different.

URL encoding: "<" -> "%3c"

HTML Encoding: "<" -> "& lt;"

If it is the URL encoding you want, you can easily do so with the URI::encode iRule command

when HTTP_REQUEST {
  HTTP::uri [URI::encode [HTTP::uri]]
}

This will turn "/foobar(foo)" into "%2ffoo%3cbar%3ebar(foo)"

If you want to do HTML encoding, then you'll have to do a manual string map of what you want to convert.

when HTTP_REQUEST {
  HTTP::uri [string map { "<" "<" ">" ">" } [HTTP::uri]]
}

This will convert "/foobar(foo)" into "/foobar(foo)"

As far as I know there is not a URI or HTML encoded value for parenthesis but you can extend the last iRule above to whatever translation you want.

Hope this helps...

-Joe