def test_dumps_loads(self):
"dumps and loads be reversible for any JSON serializable object"
objects = [
['a', 'list'],
'a unicode string \u2019',
{'a': 'dictionary'},
]
if not six.PY3:
objects.append(b'a byte string')
for o in objects:
self.assertNotEqual(o, signing.dumps(o))
self.assertEqual(o, signing.loads(signing.dumps(o)))
self.assertNotEqual(o, signing.dumps(o, compress=True))
self.assertEqual(o, signing.loads(signing.dumps(o, compress=True)))
def load(self):
"""
We load the data from the key itself instead of fetching from
some external data store. Opposite of _get_session_key(),
raises BadSignature if signature fails.
"""
try:
return signing.loads(self.session_key,
serializer=PickleSerializer,
max_age=settings.SESSION_COOKIE_AGE,
salt='djangocg.contrib.sessions.backends.signed_cookies')
except (signing.BadSignature, ValueError):
self.create()
return {}
def test_decode_detects_tampering(self):
"loads should raise exception for tampered objects"
transforms = (
lambda s: s.upper(),
lambda s: s + 'a',
lambda s: 'a' + s[1:],
lambda s: s.replace(':', ''),
)
value = {
'foo': 'bar',
'baz': 1,
}
encoded = signing.dumps(value)
self.assertEqual(value, signing.loads(encoded))
for transform in transforms:
self.assertRaises(
signing.BadSignature, signing.loads, transform(encoded))