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from django.core.exceptions import SuspiciousOperation
from django.core.signing import BadSignature
from django.utils import simplejson as json
from django.contrib.formtools.wizard import storage
class CookieStorage(storage.BaseStorage):
encoder = json.JSONEncoder(separators=(',', ':'))
def __init__(self, *args, **kwargs):
super(CookieStorage, self).__init__(*args, **kwargs)
self.data = self.load_data()
if self.data is None:
self.init_data()
def load_data(self):
try:
data = self.request.get_signed_cookie(self.prefix)
except KeyError:
data = None
except BadSignature:
raise SuspiciousOperation('WizardView cookie manipulated')
if data is None:
return None
return json.loads(data, cls=json.JSONDecoder)
def update_response(self, response):
if self.data:
response.set_signed_cookie(self.prefix, self.encoder.encode(self.data))
else:
response.delete_cookie(self.prefix)
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