requests.py 文件源码

def __init__(self, credentials,
                 refresh_status_codes=transport.DEFAULT_REFRESH_STATUS_CODES,
                 max_refresh_attempts=transport.DEFAULT_MAX_REFRESH_ATTEMPTS,
                 refresh_timeout=None,
                 **kwargs):
        super(AuthorizedSession, self).__init__(**kwargs)
        self.credentials = credentials
        self._refresh_status_codes = refresh_status_codes
        self._max_refresh_attempts = max_refresh_attempts
        self._refresh_timeout = refresh_timeout

        auth_request_session = requests.Session()

        # Using an adapter to make HTTP requests robust to network errors.
        # This adapter retrys HTTP requests when network errors occur
        # and the requests seems safely retryable.
        retry_adapter = requests.adapters.HTTPAdapter(max_retries=3)
        auth_request_session.mount("https://", retry_adapter)

        # Request instance used by internal methods (for example,
        # credentials.refresh).
        # Do not pass `self` as the session here, as it can lead to infinite
        # recursion.
        self._auth_request = Request(auth_request_session)