def get_raw(self, url: str, _attempt=1) -> requests.Response:
        """Downloads a file anonymously.

        :raises QueryReturnedNotFoundException: When the server responds with a 404.
        :raises QueryReturnedForbiddenException: When the server responds with a 403.
        :raises ConnectionException: When download failed.

        .. versionadded:: 4.2.1"""
        with self.get_anonymous_session() as anonymous_session:
            resp = anonymous_session.get(url, stream=True)
        if resp.status_code == 200:
            resp.raw.decode_content = True
            return resp
        else:
            if resp.status_code == 403:
                # suspected invalid URL signature
                raise QueryReturnedForbiddenException("403 when accessing {}.".format(url))
            if resp.status_code == 404:
                # 404 not worth retrying.
                raise QueryReturnedNotFoundException("404 when accessing {}.".format(url))
            raise ConnectionException("HTTP error code {}.".format(resp.status_code))
Downloads a file anonymously.

        :raises QueryReturnedNotFoundException: When the server responds with a 404.
        :raises QueryReturnedForbiddenException: When the server responds with a 403.
        :raises ConnectionException: When download failed.

        .. versionadded:: 4.2.1