21     import google.auth.credentials
42     """Returns credentials loaded from a file."""
44 …credentials, _ = google.auth.load_credentials_from_file(filename, scopes=scopes, quota_project_id=…
45         return credentials
52     """Returns Application Default Credentials."""
54         credentials, _ = google.auth.default(scopes=scopes, quota_project_id=quota_project_id)
55         return credentials
70 def with_scopes(credentials, scopes):  argument
71     """Scopes the credentials if necessary.
74         credentials (Union[
75             google.auth.credentials.Credentials,
76             oauth2client.client.Credentials]): The credentials to scope.
80         Union[google.auth.credentials.Credentials,
81             oauth2client.client.Credentials]: The scoped credentials.
83     if HAS_GOOGLE_AUTH and isinstance(credentials, google.auth.credentials.Credentials):
84         return google.auth.credentials.with_scopes_if_required(credentials, scopes)
87             if credentials.create_scoped_required():
88                 return credentials.create_scoped(scopes)
90                 return credentials
92             return credentials
95 def authorized_http(credentials):  argument
96     """Returns an http client that is authorized with the given credentials.
99         credentials (Union[
100             google.auth.credentials.Credentials,
101             oauth2client.client.Credentials]): The credentials to use.
109     if HAS_GOOGLE_AUTH and isinstance(credentials, google.auth.credentials.Credentials):
112                 "Credentials from google.auth specified, but "
113                 "google-api-python-client is unable to use these credentials "
117         return google_auth_httplib2.AuthorizedHttp(credentials, http=build_http())
119         return credentials.authorize(build_http())
122 def refresh_credentials(credentials):  argument
124     # credentials could be a AuthorizedHttp or an oauth2client-decorated
128     if HAS_GOOGLE_AUTH and isinstance(credentials, google.auth.credentials.Credentials):
130         return credentials.refresh(request)
132         return credentials.refresh(refresh_http)
135 def apply_credentials(credentials, headers):  argument
137     if not is_valid(credentials):
138         refresh_credentials(credentials)
139     return credentials.apply(headers)
142 def is_valid(credentials):  argument
143     if HAS_GOOGLE_AUTH and isinstance(credentials, google.auth.credentials.Credentials):
144         return credentials.valid
147             credentials.access_token is not None
148             and not credentials.access_token_expired
155     elif hasattr(http.request, "credentials"):
156         return http.request.credentials
157     elif hasattr(http, "credentials") and not isinstance(
158         http.credentials, httplib2.Credentials
160         return http.credentials