93 lines
2.2 KiB
Python
93 lines
2.2 KiB
Python
# Copyright (C) 2010 Google Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Utilities for OAuth.
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Utilities for making it easier to work with OAuth 2.0
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credentials.
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"""
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__author__ = 'jcgregorio@google.com (Joe Gregorio)'
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import threading
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try: # pragma: no cover
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import simplejson
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except ImportError: # pragma: no cover
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try:
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# Try to import from django, should work on App Engine
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from django.utils import simplejson
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except ImportError:
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# Should work for Python2.6 and higher.
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import json as simplejson
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from client import Storage as BaseStorage
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from client import Credentials
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class Storage(BaseStorage):
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"""Store and retrieve a single credential to and from a file."""
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def __init__(self, filename):
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self._filename = filename
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self._lock = threading.Lock()
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def acquire_lock(self):
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"""Acquires any lock necessary to access this Storage.
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This lock is not reentrant."""
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self._lock.acquire()
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def release_lock(self):
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"""Release the Storage lock.
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Trying to release a lock that isn't held will result in a
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RuntimeError.
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"""
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self._lock.release()
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def locked_get(self):
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"""Retrieve Credential from file.
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Returns:
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oauth2client.client.Credentials
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"""
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credentials = None
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try:
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f = open(self._filename, 'r')
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content = f.read()
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f.close()
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except IOError:
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return credentials
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try:
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credentials = Credentials.new_from_json(content)
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credentials.set_store(self)
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except ValueError:
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pass
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return credentials
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def locked_put(self, credentials):
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"""Write Credentials to file.
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Args:
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credentials: Credentials, the credentials to store.
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"""
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f = open(self._filename, 'w')
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f.write(credentials.to_json())
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f.close()
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