Fixed #23730 -- Moved support for SimpleCookie HIGHEST_PROTOCOL pickling to http.cookie.

This fix is necessary for Python 3.5 compatibility (refs #23763).

Thanks Berker Peksag for review.

django/http/cookie.py

@@ -1,4 +1,5 @@
 from __future__ import unicode_literals
+import sys
 
 from django.utils.encoding import force_str
 from django.utils import six
@@ -15,12 +16,29 @@ try:
 except http_cookies.CookieError:
     _cookie_allows_colon_in_names = False
 
-if _cookie_encodes_correctly and _cookie_allows_colon_in_names:
+# Cookie pickling bug is fixed in Python 2.7.9 and Python 3.4.3+
+# http://bugs.python.org/issue22775
+cookie_pickles_properly = (
+    (sys.version_info[:2] == (2, 7) and sys.version_info >= (2, 7, 9)) or
+    sys.version_info >= (3, 4, 3)
+)
+
+if _cookie_encodes_correctly and _cookie_allows_colon_in_names and cookie_pickles_properly:
     SimpleCookie = http_cookies.SimpleCookie
 else:
     Morsel = http_cookies.Morsel
 
     class SimpleCookie(http_cookies.SimpleCookie):
+        if not cookie_pickles_properly:
+            def __setitem__(self, key, value):
+                # Apply the fix from http://bugs.python.org/issue22775 where
+                # it's not fixed in Python itself
+                if isinstance(value, Morsel):
+                    # allow assignment of constructed Morsels (e.g. for pickling)
+                    dict.__setitem__(self, key, value)
+                else:
+                    super(SimpleCookie, self).__setitem__(key, value)
+
         if not _cookie_encodes_correctly:
             def value_encode(self, val):
                 # Some browsers do not support quoted-string from RFC 2109,

django/http/response.py

@@ -206,17 +206,6 @@ class HttpResponseBase(six.Iterator):
     def __getitem__(self, header):
         return self._headers[header.lower()][1]
 
-    def __getstate__(self):
-        # SimpleCookie is not pickleable with pickle.HIGHEST_PROTOCOL, so we
-        # serialize to a string instead
-        state = self.__dict__.copy()
-        state['cookies'] = str(state['cookies'])
-        return state
-
-    def __setstate__(self, state):
-        self.__dict__.update(state)
-        self.cookies = SimpleCookie(self.cookies)
-
     def has_header(self, header):
         """Case-insensitive check for a header."""
         return header.lower() in self._headers

django/template/response.py

@@ -39,7 +39,7 @@ class SimpleTemplateResponse(HttpResponse):
         rendered, and that the pickled state only includes rendered
         data, not the data used to construct the response.
         """
-        obj_dict = super(SimpleTemplateResponse, self).__getstate__()
+        obj_dict = self.__dict__.copy()
         if not self._is_rendered:
             raise ContentNotRenderedError('The response content must be '
                                           'rendered before it can be pickled.')

tests/httpwrappers/tests.py

@@ -631,7 +631,7 @@ class CookieTests(unittest.TestCase):
         c = SimpleCookie()
         c['test'] = "An,awkward;value"
         c2 = SimpleCookie()
-        c2.load(c.output())
+        c2.load(c.output()[12:])
         self.assertEqual(c['test'].value, c2['test'].value)
 
     def test_decode_2(self):
@@ -641,7 +641,7 @@ class CookieTests(unittest.TestCase):
         c = SimpleCookie()
         c['test'] = b"\xf0"
         c2 = SimpleCookie()
-        c2.load(c.output())
+        c2.load(c.output()[12:])
         self.assertEqual(c['test'].value, c2['test'].value)
 
     def test_nonstandard_keys(self):
@@ -678,3 +678,15 @@ class CookieTests(unittest.TestCase):
         r = HttpResponse()
         r.set_cookie("a:.b/", 1)
         self.assertEqual(len(r.cookies.bad_cookies), 1)
+
+    def test_pickle(self):
+        rawdata = 'Customer="WILE_E_COYOTE"; Path=/acme; Version=1'
+        expected_output = 'Set-Cookie: %s' % rawdata
+
+        C = SimpleCookie()
+        C.load(rawdata)
+        self.assertEqual(C.output(), expected_output)
+
+        for proto in range(pickle.HIGHEST_PROTOCOL + 1):
+            C1 = pickle.loads(pickle.dumps(C, protocol=proto))
+            self.assertEqual(C1.output(), expected_output)