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# Copyright 2016 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Dictionary storage for OAuth2 Credentials."""
from oauth2client import client
class DictionaryStorage(client.Storage):
"""Store and retrieve credentials to and from a dictionary-like object.
Args:
dictionary: A dictionary or dictionary-like object.
key: A string or other hashable. The credentials will be stored in
``dictionary[key]``.
lock: An optional threading.Lock-like object. The lock will be
acquired before anything is written or read from the
dictionary.
"""
def __init__(self, dictionary, key, lock=None):
"""Construct a DictionaryStorage instance."""
super(DictionaryStorage, self).__init__(lock=lock)
self._dictionary = dictionary
self._key = key
def locked_get(self):
"""Retrieve the credentials from the dictionary, if they exist.
Returns: A :class:`oauth2client.client.OAuth2Credentials` instance.
"""
serialized = self._dictionary.get(self._key)
if serialized is None:
return None
credentials = client.OAuth2Credentials.from_json(serialized)
credentials.set_store(self)
return credentials
def locked_put(self, credentials):
"""Save the credentials to the dictionary.
Args:
credentials: A :class:`oauth2client.client.OAuth2Credentials`
instance.
"""
serialized = credentials.to_json()
self._dictionary[self._key] = serialized
def locked_delete(self):
"""Remove the credentials from the dictionary, if they exist."""
self._dictionary.pop(self._key, None)
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