[PR #10371/f46ccff backport][3.12] 'partitioned' parameter for set_cookie method. (#10378)

Author: jpjacobpadilla

CHANGES/9870.misc.rst

@@ -0,0 +1 @@
+Added support for the ``partitioned`` attribute in the ``set_cookie`` method.

aiohttp/web_response.py

@@ -233,6 +233,7 @@ def set_cookie(
         httponly: Optional[bool] = None,
         version: Optional[str] = None,
         samesite: Optional[str] = None,
+        partitioned: Optional[bool] = None,
     ) -> None:
         """Set or update response cookie.
 
@@ -269,6 +270,9 @@ def set_cookie(
         if samesite is not None:
             c["samesite"] = samesite
 
+        if partitioned is not None:
+            c["partitioned"] = partitioned
+
     def del_cookie(
         self,
         name: str,

docs/web_reference.rst

@@ -726,7 +726,7 @@ and :ref:`aiohttp-web-signals` handlers::
    .. method:: set_cookie(name, value, *, path='/', expires=None, \
                           domain=None, max_age=None, \
                           secure=None, httponly=None, version=None, \
-                          samesite=None)
+                          samesite=None, partitioned=None)
 
       Convenient way for setting :attr:`cookies`, allows to specify
       some additional properties like *max_age* in a single call.
@@ -779,6 +779,11 @@ and :ref:`aiohttp-web-signals` handlers::
 
             .. versionadded:: 3.7
 
+      :param bool partitioned: ``True`` to set a partitioned cookie.
+         Available in Python 3.14+. (optional)
+
+            .. versionadded:: 3.12
+
       .. warning::
 
          In HTTP version 1.1, ``expires`` was deprecated and replaced with

tests/test_web_response.py

@@ -3,6 +3,7 @@
 import gzip
 import io
 import json
+import sys
 import zlib
 from concurrent.futures import ThreadPoolExecutor
 from typing import AsyncIterator, Optional
@@ -900,6 +901,19 @@ def test_response_cookies() -> None:
     assert str(resp.cookies) == expected
 
 
+@pytest.mark.skipif(sys.version_info < (3, 14), reason="No partitioned support")
+def test_response_cookie_partitioned() -> None:
+    resp = StreamResponse()
+
+    assert resp.cookies == {}
+
+    resp.set_cookie("name", "value", partitioned=False)
+    assert str(resp.cookies) == "Set-Cookie: name=value; Path=/"
+
+    resp.set_cookie("name", "value", partitioned=True)
+    assert str(resp.cookies) == "Set-Cookie: name=value; Partitioned; Path=/"
+
+
 def test_response_cookie_path() -> None:
     resp = StreamResponse()