static S getClientIP() {
  ifclass MyHTTPD {
    SS headers = MyHTTPD_headers!;
    if (headers != null)
      ret getClientIPFromHeaders(headers);
  } endif
  ifclass WebSocketHTTPD {
    SS headers = WebSocketHTTPD_headers!;
    if (headers != null)
      ret getClientIPFromHeaders(headers);
  } endif
  ret getClientIP_subBot();
}