Scripts to download files from google storage based on sha1 sums

third_party/gsutil/cloudauth/oauth2_plugin.py

+# Copyright 2011 Google Inc.
+#
+# 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.
+
+# This code implements an OAUTH2 plugin that reads the access token from
+# App Engine StorageByKeyName.
+
+from oauth2client.appengine import CredentialsProperty
+from oauth2client.appengine import StorageByKeyName
+from google.appengine.api import users
+from google.appengine.ext import db
+from boto.auth_handler import AuthHandler
+from boto.auth_handler import NotReadyToAuthenticate 
+
+
+class Credentials(db.Model):
+  credentials = CredentialsProperty()
+
+
+class OAuth2Auth(AuthHandler):
+
+  capability = ['google-oauth2', 's3']
+
+  def __init__(self, path, config, provider):
+    if provider.name != 'google':
+      raise NotReadyToAuthenticate()
+
+  def add_auth(self, http_request):
+    user = users.get_current_user()
+    credentials = StorageByKeyName(
+        Credentials, user.user_id(), 'credentials').get()
+    if not credentials or credentials.invalid:
+      raise NotReadyToAuthenticate()
+    http_request.headers['Authorization'] = (
+        'Bearer %s' % str(credentials.access_token))