137 lines
3.9 KiB
Python
137 lines
3.9 KiB
Python
# Copyright (C) 2010 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.
|
|
|
|
"""Utilities for Google App Engine
|
|
|
|
Utilities for making it easier to use OAuth 2.0
|
|
on Google App Engine.
|
|
"""
|
|
|
|
__author__ = 'jcgregorio@google.com (Joe Gregorio)'
|
|
|
|
import pickle
|
|
|
|
from google.appengine.ext import db
|
|
from client import Credentials
|
|
from client import Flow
|
|
from client import Storage
|
|
|
|
|
|
class FlowProperty(db.Property):
|
|
"""Utility property that allows easy
|
|
storage and retreival of an
|
|
oauth2client.Flow"""
|
|
|
|
# Tell what the user type is.
|
|
data_type = Flow
|
|
|
|
# For writing to datastore.
|
|
def get_value_for_datastore(self, model_instance):
|
|
flow = super(FlowProperty,
|
|
self).get_value_for_datastore(model_instance)
|
|
return db.Blob(pickle.dumps(flow))
|
|
|
|
# For reading from datastore.
|
|
def make_value_from_datastore(self, value):
|
|
if value is None:
|
|
return None
|
|
return pickle.loads(value)
|
|
|
|
def validate(self, value):
|
|
if value is not None and not isinstance(value, Flow):
|
|
raise BadValueError('Property %s must be convertible '
|
|
'to a FlowThreeLegged instance (%s)' %
|
|
(self.name, value))
|
|
return super(FlowProperty, self).validate(value)
|
|
|
|
def empty(self, value):
|
|
return not value
|
|
|
|
|
|
class CredentialsProperty(db.Property):
|
|
"""Utility property that allows easy
|
|
storage and retrieval of
|
|
oath2client.Credentials
|
|
"""
|
|
|
|
# Tell what the user type is.
|
|
data_type = Credentials
|
|
|
|
# For writing to datastore.
|
|
def get_value_for_datastore(self, model_instance):
|
|
cred = super(CredentialsProperty,
|
|
self).get_value_for_datastore(model_instance)
|
|
return db.Blob(pickle.dumps(cred))
|
|
|
|
# For reading from datastore.
|
|
def make_value_from_datastore(self, value):
|
|
if value is None:
|
|
return None
|
|
return pickle.loads(value)
|
|
|
|
def validate(self, value):
|
|
if value is not None and not isinstance(value, Credentials):
|
|
raise BadValueError('Property %s must be convertible '
|
|
'to an Credentials instance (%s)' %
|
|
(self.name, value))
|
|
return super(CredentialsProperty, self).validate(value)
|
|
|
|
def empty(self, value):
|
|
return not value
|
|
|
|
|
|
class StorageByKeyName(Storage):
|
|
"""Store and retrieve a single credential to and from
|
|
the App Engine datastore.
|
|
|
|
This Storage helper presumes the Credentials
|
|
have been stored as a CredenialsProperty
|
|
on a datastore model class, and that entities
|
|
are stored by key_name.
|
|
"""
|
|
|
|
def __init__(self, model, key_name, property_name):
|
|
"""Constructor for Storage.
|
|
|
|
Args:
|
|
model: db.Model, model class
|
|
key_name: string, key name for the entity that has the credentials
|
|
property_name: string, name of the property that is an CredentialsProperty
|
|
"""
|
|
self.model = model
|
|
self.key_name = key_name
|
|
self.property_name = property_name
|
|
|
|
def get(self):
|
|
"""Retrieve Credential from datastore.
|
|
|
|
Returns:
|
|
oauth2client.Credentials
|
|
"""
|
|
entity = self.model.get_or_insert(self.key_name)
|
|
credential = getattr(entity, self.property_name)
|
|
if credential and hasattr(credential, 'set_store'):
|
|
credential.set_store(self.put)
|
|
return credential
|
|
|
|
def put(self, credentials):
|
|
"""Write a Credentials to the datastore.
|
|
|
|
Args:
|
|
credentials: Credentials, the credentials to store.
|
|
"""
|
|
entity = self.model.get_or_insert(self.key_name)
|
|
setattr(entity, self.property_name, credentials)
|
|
entity.put()
|