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from datetime import timedelta
from django.core import signing
from django.http import HttpRequest, HttpResponse
from django.test import SimpleTestCase, override_settings
from django.test.utils import freeze_time
class SignedCookieTest(SimpleTestCase):
def test_can_set_and_read_signed_cookies(self):
response = HttpResponse()
response.set_signed_cookie("c", "hello")
self.assertIn("c", response.cookies)
self.assertTrue(response.cookies["c"].value.startswith("hello:"))
request = HttpRequest()
request.COOKIES["c"] = response.cookies["c"].value
value = request.get_signed_cookie("c")
self.assertEqual(value, "hello")
def test_can_use_salt(self):
response = HttpResponse()
response.set_signed_cookie("a", "hello", salt="one")
request = HttpRequest()
request.COOKIES["a"] = response.cookies["a"].value
value = request.get_signed_cookie("a", salt="one")
self.assertEqual(value, "hello")
with self.assertRaises(signing.BadSignature):
request.get_signed_cookie("a", salt="two")
def test_detects_tampering(self):
response = HttpResponse()
response.set_signed_cookie("c", "hello")
request = HttpRequest()
request.COOKIES["c"] = response.cookies["c"].value[:-2] + "$$"
with self.assertRaises(signing.BadSignature):
request.get_signed_cookie("c")
def test_default_argument_suppresses_exceptions(self):
response = HttpResponse()
response.set_signed_cookie("c", "hello")
request = HttpRequest()
request.COOKIES["c"] = response.cookies["c"].value[:-2] + "$$"
self.assertIsNone(request.get_signed_cookie("c", default=None))
def test_max_age_argument(self):
value = "hello"
with freeze_time(123456789):
response = HttpResponse()
response.set_signed_cookie("c", value)
request = HttpRequest()
request.COOKIES["c"] = response.cookies["c"].value
self.assertEqual(request.get_signed_cookie("c"), value)
with freeze_time(123456800):
self.assertEqual(request.get_signed_cookie("c", max_age=12), value)
self.assertEqual(request.get_signed_cookie("c", max_age=11), value)
self.assertEqual(
request.get_signed_cookie("c", max_age=timedelta(seconds=11)), value
)
with self.assertRaises(signing.SignatureExpired):
request.get_signed_cookie("c", max_age=10)
with self.assertRaises(signing.SignatureExpired):
request.get_signed_cookie("c", max_age=timedelta(seconds=10))
def test_set_signed_cookie_max_age_argument(self):
response = HttpResponse()
response.set_signed_cookie("c", "value", max_age=100)
self.assertEqual(response.cookies["c"]["max-age"], 100)
response.set_signed_cookie("d", "value", max_age=timedelta(hours=2))
self.assertEqual(response.cookies["d"]["max-age"], 7200)
@override_settings(SECRET_KEY=b"\xe7")
def test_signed_cookies_with_binary_key(self):
response = HttpResponse()
response.set_signed_cookie("c", "hello")
request = HttpRequest()
request.COOKIES["c"] = response.cookies["c"].value
self.assertEqual(request.get_signed_cookie("c"), "hello")
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