1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
import random
from django.contrib.messages import constants
from django.contrib.messages.storage.fallback import CookieStorage, FallbackStorage
from django.test import SimpleTestCase
from django.utils.crypto import get_random_string
from .base import BaseTests
from .test_cookie import set_cookie_data, stored_cookie_messages_count
from .test_session import set_session_data, stored_session_messages_count
class FallbackTests(BaseTests, SimpleTestCase):
storage_class = FallbackStorage
def get_request(self):
self.session = {}
request = super().get_request()
request.session = self.session
return request
def get_cookie_storage(self, storage):
return storage.storages[-2]
def get_session_storage(self, storage):
return storage.storages[-1]
def stored_cookie_messages_count(self, storage, response):
return stored_cookie_messages_count(self.get_cookie_storage(storage), response)
def stored_session_messages_count(self, storage, response):
return stored_session_messages_count(self.get_session_storage(storage))
def stored_messages_count(self, storage, response):
"""
Return the storage totals from both cookie and session backends.
"""
return self.stored_cookie_messages_count(
storage, response
) + self.stored_session_messages_count(storage, response)
def test_get(self):
request = self.get_request()
storage = self.storage_class(request)
cookie_storage = self.get_cookie_storage(storage)
# Set initial cookie data.
example_messages = [str(i) for i in range(5)]
set_cookie_data(cookie_storage, example_messages)
# Overwrite the _get method of the fallback storage to prove it is not
# used (it would cause a TypeError: 'NoneType' object is not callable).
self.get_session_storage(storage)._get = None
self.assertEqual(list(storage), example_messages)
def test_get_empty(self):
request = self.get_request()
storage = self.storage_class(request)
# Overwrite the _get method of the fallback storage to prove it is not
# used (it would cause a TypeError: 'NoneType' object is not callable).
self.get_session_storage(storage)._get = None
self.assertEqual(list(storage), [])
def test_get_fallback(self):
request = self.get_request()
storage = self.storage_class(request)
cookie_storage = self.get_cookie_storage(storage)
session_storage = self.get_session_storage(storage)
# Set initial cookie and session data.
example_messages = [str(i) for i in range(5)]
set_cookie_data(
cookie_storage, example_messages[:4] + [CookieStorage.not_finished]
)
set_session_data(session_storage, example_messages[4:])
self.assertEqual(list(storage), example_messages)
def test_get_fallback_only(self):
request = self.get_request()
storage = self.storage_class(request)
cookie_storage = self.get_cookie_storage(storage)
session_storage = self.get_session_storage(storage)
# Set initial cookie and session data.
example_messages = [str(i) for i in range(5)]
set_cookie_data(cookie_storage, [CookieStorage.not_finished], encode_empty=True)
set_session_data(session_storage, example_messages)
self.assertEqual(list(storage), example_messages)
def test_flush_used_backends(self):
request = self.get_request()
storage = self.storage_class(request)
cookie_storage = self.get_cookie_storage(storage)
session_storage = self.get_session_storage(storage)
# Set initial cookie and session data.
set_cookie_data(cookie_storage, ["cookie", CookieStorage.not_finished])
set_session_data(session_storage, ["session"])
# When updating, previously used but no longer needed backends are
# flushed.
response = self.get_response()
list(storage)
storage.update(response)
session_storing = self.stored_session_messages_count(storage, response)
self.assertEqual(session_storing, 0)
def test_no_fallback(self):
"""
(1) A short number of messages whose data size doesn't exceed what is
allowed in a cookie will all be stored in the CookieBackend.
(2) If the CookieBackend can store all messages, the SessionBackend
won't be written to at all.
"""
storage = self.get_storage()
response = self.get_response()
# Overwrite the _store method of the fallback storage to prove it isn't
# used (it would cause a TypeError: 'NoneType' object is not callable).
self.get_session_storage(storage)._store = None
for i in range(5):
storage.add(constants.INFO, str(i) * 100)
storage.update(response)
cookie_storing = self.stored_cookie_messages_count(storage, response)
self.assertEqual(cookie_storing, 5)
session_storing = self.stored_session_messages_count(storage, response)
self.assertEqual(session_storing, 0)
def test_session_fallback(self):
"""
If the data exceeds what is allowed in a cookie, messages which did
not fit are stored in the SessionBackend.
"""
storage = self.get_storage()
response = self.get_response()
# see comment in CookieTests.test_cookie_max_length()
msg_size = int((CookieStorage.max_cookie_size - 54) / 4.5 - 37)
# Generate the same (tested) content every time that does not get run
# through zlib compression.
random.seed(42)
for i in range(5):
storage.add(constants.INFO, get_random_string(msg_size))
storage.update(response)
cookie_storing = self.stored_cookie_messages_count(storage, response)
self.assertEqual(cookie_storing, 4)
session_storing = self.stored_session_messages_count(storage, response)
self.assertEqual(session_storing, 1)
def test_session_fallback_only(self):
"""
Large messages, none of which fit in a cookie, are stored in the
SessionBackend (and nothing is stored in the CookieBackend).
"""
storage = self.get_storage()
response = self.get_response()
# Generate the same (tested) content every time that does not get run
# through zlib compression.
random.seed(42)
storage.add(constants.INFO, get_random_string(5000))
storage.update(response)
cookie_storing = self.stored_cookie_messages_count(storage, response)
self.assertEqual(cookie_storing, 0)
session_storing = self.stored_session_messages_count(storage, response)
self.assertEqual(session_storing, 1)
|
