iRules to implement Security requirements in headers

Classes are used to search data groups.

There's probably way more elegant ways to do this, but the below extracts the ending from the HTTP::path and searches through the list of endings:

when RULE_INIT {
    set static::endinglist { ".jpg" ".jpeg" ".css" ".js" ".ico" ".png" ".gif" ".svg" ".bmp" ".webp" ".avif" ".jxl" ".woff2" ".ttf" ".woff" ".mp4" }
}
when HTTP_REQUEST { 
    if { [lsearch -all $static::endinglist [string range [HTTP::path] [string last "." [HTTP::path]] end]] ne "" } {
        HTTP::header replace Cache-Control "no-cache"
    }
}