Removing HTTP headers within an HTTP::respond

what about something like this?

 configuration

[root@ve11a:Active:In Sync] config  tmsh list ltm rule qux
ltm rule qux {
    when RULE_INIT {
  set static::blockpage "hello world\r\n"
  set static::len [string length $static::blockpage]
}
when HTTP_REQUEST {
  TCP::respond "HTTP/1.0 200 OK\r\nCache-Control: private\r\nContent-Type: text/html; charset=utf-8\r\nContent-Length: ${static::len}\r\n\r\n$static::blockpage"
}
}

 test

[root@ve11a:Active:In Sync] config  curl -i http://172.28.24.10
HTTP/1.0 200 OK
Cache-Control: private
Content-Type: text/html; charset=utf-8
Content-Length: 13

hello world