Python google.appengine.api.app_identity 模块，get_access_token() 实例源码

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, service_account_id=self.service_account_id)
        except app_identity.Error as e:
            raise AccessTokenRefreshError(str(e))
        self.access_token = token

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

def _refresh(self, http):
        """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: unused HTTP object

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

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:
      (token, _) = app_identity.get_access_token(self.scope)
    except app_identity.Error, e:
      raise AccessTokenRefreshError(str(e))
    self.access_token = token

def _refresh(self, http):
        """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: unused HTTP object

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

def _refresh(self, http):
        """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: unused HTTP object

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

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, service_account_id=self.service_account_id)
    except app_identity.Error as e:
      raise AccessTokenRefreshError(str(e))
    self.access_token = token

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, service_account_id=self.service_account_id)
        except app_identity.Error as e:
            raise AccessTokenRefreshError(str(e))
        self.access_token = token

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, service_account_id=self.service_account_id)
    except app_identity.Error as e:
      raise AccessTokenRefreshError(str(e))
    self.access_token = token

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, service_account_id=self.service_account_id)
        except app_identity.Error as e:
            raise AccessTokenRefreshError(str(e))
        self.access_token = token

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, service_account_id=self.service_account_id)
        except app_identity.Error as e:
            raise AccessTokenRefreshError(str(e))
        self.access_token = token

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, service_account_id=self.service_account_id)
        except app_identity.Error as e:
            raise AccessTokenRefreshError(str(e))
        self.access_token = token

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, service_account_id=self.service_account_id)
    except app_identity.Error as e:
      raise AccessTokenRefreshError(str(e))
    self.access_token = token

def get(self):
        auth_token, _ = app_identity.get_access_token(
            'https://www.googleapis.com/auth/cloud-platform')
        logging.info(
            'Using token {} to represent identity {}'.format(
                auth_token, app_identity.get_service_account_name()))

        response = urlfetch.fetch(
            'https://www.googleapis.com/storage/v1/b?project={}'.format(
                app_identity.get_application_id()),
            method=urlfetch.GET,
            headers={
                'Authorization': 'Bearer {}'.format(auth_token)
            }
        )

        if response.status_code != 200:
            raise Exception(
                'Call failed. Status code {}. Body {}'.format(
                    response.status_code, response.content))

        result = json.loads(response.content)
        self.response.headers['Content-Type'] = 'application/json'
        self.response.write(json.dumps(result, indent=2))

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

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, service_account_id=self.service_account_id)
        except app_identity.Error as e:
            raise AccessTokenRefreshError(str(e))
        self.access_token = token

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, service_account_id=self.service_account_id)
        except app_identity.Error as e:
            raise AccessTokenRefreshError(str(e))
        self.access_token = token

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, service_account_id=self.service_account_id)
        except app_identity.Error as e:
            raise AccessTokenRefreshError(str(e))
        self.access_token = token

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

def list_bucket_files(bucket_name, prefix, max_keys=1000):
  """Returns a listing of of a bucket that matches the given prefix."""
  scope = config.GoogleApiScope('devstorage.read_only')
  bucket_url = config.GsBucketURL(bucket_name)
  url = bucket_url + '?'
  query = [('max-keys', max_keys)]
  if prefix:
    query.append(('prefix', prefix))
  url += urllib.urlencode(query)
  auth_token, _ = app_identity.get_access_token(scope)
  result = urlfetch.fetch(url, method=urlfetch.GET, headers={
      'Authorization': 'OAuth %s' % auth_token,
      'x-goog-api-version': '2'})
  if result and result.status_code == 200:
    doc = xml.dom.minidom.parseString(result.content)
    return [node.childNodes[0].data for node in doc.getElementsByTagName('Key')]
  raise BackupValidationError('Request to Google Cloud Storage failed')

def get_gs_object(bucket_name, path):
  """Returns a listing of of a bucket that matches the given prefix."""
  scope = config.GoogleApiScope('devstorage.read_only')
  bucket_url = config.GsBucketURL(bucket_name)
  url = bucket_url + path
  auth_token, _ = app_identity.get_access_token(scope)
  result = urlfetch.fetch(url, method=urlfetch.GET, headers={
      'Authorization': 'OAuth %s' % auth_token,
      'x-goog-api-version': '2'})
  if result and result.status_code == 200:
    return result.content
  if result and result.status_code == 403:
    raise BackupValidationError(
        'Requested path %s is not accessible/access denied' % url)
  if result and result.status_code == 404:
    raise BackupValidationError('Requested path %s was not found' % url)
  raise BackupValidationError('Error encountered accessing requested path %s' %
                              url)

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, service_account_id=self.service_account_id)
    except app_identity.Error as e:
      raise AccessTokenRefreshError(str(e))
    self.access_token = token

def _refresh(self, http):
        """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: unused HTTP object

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

def _refresh(self, http):
        """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: unused HTTP object

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

def __init__(self, scopes=None, service_account_id=None):
        """
        Args:
            scopes (Sequence[str]): Scopes to request from the App Identity
                API.
            service_account_id (str): The service account ID passed into
                :func:`google.appengine.api.app_identity.get_access_token`.
                If not specified, the default application service account
                ID will be used.

        Raises:
            EnvironmentError: If the App Engine APIs are unavailable.
        """
        # pylint: disable=missing-raises-doc
        # Pylint rightfully thinks EnvironmentError is OSError, but doesn't
        # realize it's a valid alias.
        if app_identity is None:
            raise EnvironmentError(
                'The App Engine APIs are not available.')

        super(Credentials, self).__init__()
        self._scopes = scopes
        self._service_account_id = service_account_id
        self._signer = Signer()

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, service_account_id=self.service_account_id)
        except app_identity.Error as e:
            raise AccessTokenRefreshError(str(e))
        self.access_token = token

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

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, service_account_id=self.service_account_id)
        except app_identity.Error as e:
            raise AccessTokenRefreshError(str(e))
        self.access_token = token

def is_accessible_bucket_name(bucket_name):
  """Returns True if the application has access to the specified bucket."""
  scope = config.GoogleApiScope('devstorage.read_write')
  bucket_url = config.GsBucketURL(bucket_name)
  auth_token, _ = app_identity.get_access_token(scope)
  result = urlfetch.fetch(bucket_url, method=urlfetch.HEAD, headers={
      'Authorization': 'OAuth %s' % auth_token,
      'x-goog-api-version': '2'})
  return result and result.status_code == 200

def refresh(self, request):
        # pylint: disable=unused-argument
        token, ttl = app_identity.get_access_token(
            self._scopes, self._service_account_id)
        expiry = datetime.datetime.utcfromtimestamp(ttl)

        self.token, self.expiry = token, expiry