86 lines
2.3 KiB
Python
86 lines
2.3 KiB
Python
from django.db import models
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from oauth2client.client import Storage as BaseStorage
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class CredentialsField(models.Field):
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__metaclass__ = models.SubfieldBase
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def db_type(self):
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return 'VARCHAR'
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def to_python(self, value):
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if value is None:
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return None
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if isinstance(value, oauth2client.Credentials):
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return value
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return pickle.loads(base64.b64decode(value))
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def get_db_prep_value(self, value):
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return base64.b64encode(pickle.dumps(value))
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class FlowField(models.Field):
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__metaclass__ = models.SubfieldBase
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def db_type(self):
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return 'VARCHAR'
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def to_python(self, value):
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print "In to_python", value
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if value is None:
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return None
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if isinstance(value, oauth2client.Flow):
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return value
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return pickle.loads(base64.b64decode(value))
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def get_db_prep_value(self, value):
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return base64.b64encode(pickle.dumps(value))
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class Storage(BaseStorage):
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"""Store and retrieve a single credential to and from
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the datastore.
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This Storage helper presumes the Credentials
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have been stored as a CredenialsField
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on a db model class.
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"""
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def __init__(self, model_class, key_name, key_value, property_name):
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"""Constructor for Storage.
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Args:
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model: db.Model, model class
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key_name: string, key name for the entity that has the credentials
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key_value: string, key value for the entity that has the credentials
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property_name: string, name of the property that is an CredentialsProperty
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"""
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self.model_class = model_class
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self.key_name = key_name
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self.key_value = key_value
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self.property_name = property_name
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def get(self):
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"""Retrieve Credential from datastore.
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Returns:
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oauth2client.Credentials
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"""
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query = {self.key_name: self.key_value}
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entity = self.model_class.objects.filter(*query)[0]
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credential = getattr(entity, self.property_name)
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if credential and hasattr(credential, 'set_store'):
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credential.set_store(self.put)
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return credential
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def put(self, credentials):
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"""Write a Credentials to the datastore.
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Args:
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credentials: Credentials, the credentials to store.
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"""
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entity = self.model_class(self.key_name=self.key_value)
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setattr(entity, self.property_name, credentials)
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entity.save()
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