protected function handleOPTIONS(): ResponseInterface
	{
		return $this->response->withStatus(204)
		                      ->withHeader("Tus-Version", self::PROTOCOL_VERSION)
		                      ->withHeader("Tus-Max-Size", $this->uploadMaxFileSize)
		                      ->withHeader("Tus-Extension", "creation,checksum,termination,crosscheck,express");
	}