public function disableGzip()
  {
    if (
        isset($this->requestHeaders['accept-encoding']) &&
        $this->requestHeaders['accept-encoding'] == "gzip"
    ) {
      unset($this->requestHeaders['accept-encoding']);
    }
    $this->canGzip = false;
    $this->userAgent = str_replace(self::GZIP_UA, "", $this->userAgent);
  }