appengine.py 文件源码

def _refresh(self, http_request):
    """Refreshes the access_token.

    Since the underlying App Engine app_identity implementation does its own
    caching we can skip all the storage hoops and just to a refresh using the
    API.

    Args:
      http_request: callable, a callable that matches the method signature of
        httplib2.Http.request, used to make the refresh request.

    Raises:
      AccessTokenRefreshError: When the refresh fails.
    """
    try:
      scopes = self.scope.split()
      (token, _) = app_identity.get_access_token(scopes)
    except app_identity.Error, e:
      raise AccessTokenRefreshError(str(e))
    self.access_token = token