==================
Bugfixes
--------
- Fixed importing aiohttp under PyPy on Windows.
`7848 <https://github.com/aio-libs/aiohttp/issues/7848>`_
- Fixed async concurrency safety in websocket compressor.
`7865 <https://github.com/aio-libs/aiohttp/issues/7865>`_
- Fixed ``ClientResponse.close()`` releasing the connection instead of closing.
`7869 <https://github.com/aio-libs/aiohttp/issues/7869>`_
- Fixed a regression where connection may get closed during upgrade. -- by :user:`Dreamsorcerer`
`7879 <https://github.com/aio-libs/aiohttp/issues/7879>`_
- Fixed messages being reported as upgraded without an Upgrade header in Python parser. -- by :user:`Dreamsorcerer`
`7895 <https://github.com/aio-libs/aiohttp/issues/7895>`_
----

==================
Features
--------
- Introduced ``AppKey`` for static typing support of ``Application`` storage.
See https://docs.aiohttp.org/en/stable/web_advanced.html#application-s-config
`5864 <https://github.com/aio-libs/aiohttp/issues/5864>`_
- Added a graceful shutdown period which allows pending tasks to complete before the application's cleanup is called.
The period can be adjusted with the ``shutdown_timeout`` parameter. -- by :user:`Dreamsorcerer`.
See https://docs.aiohttp.org/en/latest/web_advanced.html#graceful-shutdown
`7188 <https://github.com/aio-libs/aiohttp/issues/7188>`_
- Added `handler_cancellation <https://docs.aiohttp.org/en/stable/web_advanced.html#web-handler-cancellation>`_ parameter to cancel web handler on client disconnection. -- by :user:`mosquito`
This (optionally) reintroduces a feature removed in a previous release.
Recommended for those looking for an extra level of protection against denial-of-service attacks.
`7056 <https://github.com/aio-libs/aiohttp/issues/7056>`_
- Added support for setting response header parameters ``max_line_size`` and ``max_field_size``.
`2304 <https://github.com/aio-libs/aiohttp/issues/2304>`_
- Added ``auto_decompress`` parameter to ``ClientSession.request`` to override ``ClientSession._auto_decompress``. -- by :user:`Daste745`
`3751 <https://github.com/aio-libs/aiohttp/issues/3751>`_
- Changed ``raise_for_status`` to allow a coroutine.
`3892 <https://github.com/aio-libs/aiohttp/issues/3892>`_
- Added client brotli compression support (optional with runtime check).
`5219 <https://github.com/aio-libs/aiohttp/issues/5219>`_
- Added ``client_max_size`` to ``BaseRequest.clone()`` to allow overriding the request body size. -- :user:`anesabml`.
`5704 <https://github.com/aio-libs/aiohttp/issues/5704>`_
- Added a middleware type alias ``aiohttp.typedefs.Middleware``.
`5898 <https://github.com/aio-libs/aiohttp/issues/5898>`_
- Exported ``HTTPMove`` which can be used to catch any redirection request
that has a location -- :user:`dreamsorcerer`.
`6594 <https://github.com/aio-libs/aiohttp/issues/6594>`_
- Changed the ``path`` parameter in ``web.run_app()`` to accept a ``pathlib.Path`` object.
`6839 <https://github.com/aio-libs/aiohttp/issues/6839>`_
- Performance: Skipped filtering ``CookieJar`` when the jar is empty or all cookies have expired.
`7819 <https://github.com/aio-libs/aiohttp/issues/7819>`_
- Performance: Only check origin if insecure scheme and there are origins to treat as secure, in ``CookieJar.filter_cookies()``.
`7821 <https://github.com/aio-libs/aiohttp/issues/7821>`_
- Performance: Used timestamp instead of ``datetime`` to achieve faster cookie expiration in ``CookieJar``.
`7824 <https://github.com/aio-libs/aiohttp/issues/7824>`_
- Added support for passing a custom server name parameter to HTTPS connection.
`7114 <https://github.com/aio-libs/aiohttp/issues/7114>`_
- Added support for using Basic Auth credentials from :file:`.netrc` file when making HTTP requests with the
:py:class:`~aiohttp.ClientSession` ``trust_env`` argument is set to ``True``. -- by :user:`yuvipanda`.
`7131 <https://github.com/aio-libs/aiohttp/issues/7131>`_
- Turned access log into no-op when the logger is disabled.
`7240 <https://github.com/aio-libs/aiohttp/issues/7240>`_
- Added typing information to ``RawResponseMessage``. -- by :user:`Gobot1234`
`7365 <https://github.com/aio-libs/aiohttp/issues/7365>`_
- Removed ``async-timeout`` for Python 3.11+ (replaced with ``asyncio.timeout()`` on newer releases).
`7502 <https://github.com/aio-libs/aiohttp/issues/7502>`_
- Added support for ``brotlicffi`` as an alternative to ``brotli`` (fixing Brotli support on PyPy).
`7611 <https://github.com/aio-libs/aiohttp/issues/7611>`_
- Added ``WebSocketResponse.get_extra_info()`` to access a protocol transport's extra info.
`7078 <https://github.com/aio-libs/aiohttp/issues/7078>`_
- Allow ``link`` argument to be set to None/empty in HTTP 451 exception.
`7689 <https://github.com/aio-libs/aiohttp/issues/7689>`_
Bugfixes
--------
- Implemented stripping the trailing dots from fully-qualified domain names in ``Host`` headers and TLS context when acting as an HTTP client.
This allows the client to connect to URLs with FQDN host name like ``https://example.com./``.
-- by :user:`martin-sucha`.
`3636 <https://github.com/aio-libs/aiohttp/issues/3636>`_
- Fixed client timeout not working when incoming data is always available without waiting. -- by :user:`Dreamsorcerer`.
`5854 <https://github.com/aio-libs/aiohttp/issues/5854>`_
- Fixed ``readuntil`` to work with a delimiter of more than one character.
`6701 <https://github.com/aio-libs/aiohttp/issues/6701>`_
- Added ``__repr__`` to ``EmptyStreamReader`` to avoid ``AttributeError``.
`6916 <https://github.com/aio-libs/aiohttp/issues/6916>`_
- Fixed bug when using ``TCPConnector`` with ``ttl_dns_cache=0``.
`7014 <https://github.com/aio-libs/aiohttp/issues/7014>`_
- Fixed response returned from expect handler being thrown away. -- by :user:`Dreamsorcerer`
`7025 <https://github.com/aio-libs/aiohttp/issues/7025>`_
- Avoided raising ``UnicodeDecodeError`` in multipart and in HTTP headers parsing.
`7044 <https://github.com/aio-libs/aiohttp/issues/7044>`_
- Changed ``sock_read`` timeout to start after writing has finished, avoiding read timeouts caused by an unfinished write. -- by :user:`dtrifiro`
`7149 <https://github.com/aio-libs/aiohttp/issues/7149>`_
- Fixed missing query in tracing method URLs when using ``yarl`` 1.9+.
`7259 <https://github.com/aio-libs/aiohttp/issues/7259>`_
- Changed max 32-bit timestamp to an aware datetime object, for consistency with the non-32-bit one, and to avoid a ``DeprecationWarning`` on Python 3.12.
`7302 <https://github.com/aio-libs/aiohttp/issues/7302>`_
- Fixed ``EmptyStreamReader.iter_chunks()`` never ending. -- by :user:`mind1m`
`7616 <https://github.com/aio-libs/aiohttp/issues/7616>`_
- Fixed a rare ``RuntimeError: await wasn't used with future`` exception. -- by :user:`stalkerg`
`7785 <https://github.com/aio-libs/aiohttp/issues/7785>`_
- Fixed issue with insufficient HTTP method and version validation.
`7700 <https://github.com/aio-libs/aiohttp/issues/7700>`_
- Added check to validate that absolute URIs have schemes.
`7712 <https://github.com/aio-libs/aiohttp/issues/7712>`_
- Fixed unhandled exception when Python HTTP parser encounters unpaired Unicode surrogates.
`7715 <https://github.com/aio-libs/aiohttp/issues/7715>`_
- Updated parser to disallow invalid characters in header field names and stop accepting LF as a request line separator.
`7719 <https://github.com/aio-libs/aiohttp/issues/7719>`_
- Fixed Python HTTP parser not treating 204/304/1xx as an empty body.
`7755 <https://github.com/aio-libs/aiohttp/issues/7755>`_
- Ensure empty body response for 1xx/204/304 per RFC 9112 sec 6.3.
`7756 <https://github.com/aio-libs/aiohttp/issues/7756>`_
- Fixed an issue when a client request is closed before completing a chunked payload. -- by :user:`Dreamsorcerer`
`7764 <https://github.com/aio-libs/aiohttp/issues/7764>`_
- Edge Case Handling for ResponseParser for missing reason value.
`7776 <https://github.com/aio-libs/aiohttp/issues/7776>`_
- Fixed ``ClientWebSocketResponse.close_code`` being erroneously set to ``None`` when there are concurrent async tasks receiving data and closing the connection.
`7306 <https://github.com/aio-libs/aiohttp/issues/7306>`_
- Added HTTP method validation.
`6533 <https://github.com/aio-libs/aiohttp/issues/6533>`_
- Fixed arbitrary sequence types being allowed to inject values via version parameter. -- by :user:`Dreamsorcerer`
`7835 <https://github.com/aio-libs/aiohttp/issues/7835>`_
- Performance: Fixed increase in latency with small messages from websocket compression changes.
`7797 <https://github.com/aio-libs/aiohttp/issues/7797>`_
Improved Documentation
----------------------
- Fixed the `ClientResponse.release`'s type in the doc. Changed from `comethod` to `method`.
`5836 <https://github.com/aio-libs/aiohttp/issues/5836>`_
- Added information on behavior of base_url parameter in `ClientSession`.
`6647 <https://github.com/aio-libs/aiohttp/issues/6647>`_
- Fixed `ClientResponseError` docs.
`6700 <https://github.com/aio-libs/aiohttp/issues/6700>`_
- Updated Redis code examples to follow the latest API.
`6907 <https://github.com/aio-libs/aiohttp/issues/6907>`_
- Added a note about possibly needing to update headers when using ``on_response_prepare``. -- by :user:`Dreamsorcerer`
`7283 <https://github.com/aio-libs/aiohttp/issues/7283>`_
- Completed ``trust_env`` parameter description to honor ``wss_proxy``, ``ws_proxy`` or ``no_proxy`` env.
`7325 <https://github.com/aio-libs/aiohttp/issues/7325>`_
- Expanded SSL documentation with more examples (e.g. how to use certifi). -- by :user:`Dreamsorcerer`
`7334 <https://github.com/aio-libs/aiohttp/issues/7334>`_
- Fix, update, and improve client exceptions documentation.
`7733 <https://github.com/aio-libs/aiohttp/issues/7733>`_
Deprecations and Removals
-------------------------
- Added ``shutdown_timeout`` parameter to ``BaseRunner``, while
deprecating ``shutdown_timeout`` parameter from ``BaseSite``. -- by :user:`Dreamsorcerer`
`7718 <https://github.com/aio-libs/aiohttp/issues/7718>`_
- Dropped Python 3.6 support.
`6378 <https://github.com/aio-libs/aiohttp/issues/6378>`_
- Dropped Python 3.7 support. -- by :user:`Dreamsorcerer`
`7336 <https://github.com/aio-libs/aiohttp/issues/7336>`_
- Removed support for abandoned ``tokio`` event loop. -- by :user:`Dreamsorcerer`
`7281 <https://github.com/aio-libs/aiohttp/issues/7281>`_
Misc
----
- Made ``print`` argument in ``run_app()`` optional.
`3690 <https://github.com/aio-libs/aiohttp/issues/3690>`_
- Improved performance of ``ceil_timeout`` in some cases.
`6316 <https://github.com/aio-libs/aiohttp/issues/6316>`_
- Changed importing Gunicorn to happen on-demand, decreasing import time by ~53%. -- :user:`Dreamsorcerer`
`6591 <https://github.com/aio-libs/aiohttp/issues/6591>`_
- Improved import time by replacing ``http.server`` with ``http.HTTPStatus``.
`6903 <https://github.com/aio-libs/aiohttp/issues/6903>`_
- Fixed annotation of ``ssl`` parameter to disallow ``True``. -- by :user:`Dreamsorcerer`.
`7335 <https://github.com/aio-libs/aiohttp/issues/7335>`_
----

==================
Security bugfixes
-----------------
- Upgraded the vendored copy of llhttp_ to v9.1.3 -- by :user:`Dreamsorcerer`
Thanks to :user:`kenballus` for reporting this, see
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-pjjw-qhg8-p2p9.
.. _llhttp: https://llhttp.org
`7647 <https://github.com/aio-libs/aiohttp/issues/7647>`_
- Updated Python parser to comply with RFCs 9110/9112 -- by :user:`Dreamorcerer`
Thanks to :user:`kenballus` for reporting this, see
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-gfw2-4jvh-wgfg.
`7663 <https://github.com/aio-libs/aiohttp/issues/7663>`_
Deprecation
-----------
- Added ``fallback_charset_resolver`` parameter in ``ClientSession`` to allow a user-supplied
character set detection function.
Character set detection will no longer be included in 3.9 as a default. If this feature is needed,
please use `fallback_charset_resolver <https://docs.aiohttp.org/en/stable/client_advanced.html#character-set-detection>`_.
`7561 <https://github.com/aio-libs/aiohttp/issues/7561>`_
Features
--------
- Enabled lenient response parsing for more flexible parsing in the client
(this should resolve some regressions when dealing with badly formatted HTTP responses). -- by :user:`Dreamsorcerer`
`7490 <https://github.com/aio-libs/aiohttp/issues/7490>`_
Bugfixes
--------
- Fixed ``PermissionError`` when ``.netrc`` is unreadable due to permissions.
`7237 <https://github.com/aio-libs/aiohttp/issues/7237>`_
- Fixed output of parsing errors pointing to a ``\n``. -- by :user:`Dreamsorcerer`
`7468 <https://github.com/aio-libs/aiohttp/issues/7468>`_
- Fixed ``GunicornWebWorker`` max_requests_jitter not working.
`7518 <https://github.com/aio-libs/aiohttp/issues/7518>`_
- Fixed sorting in ``filter_cookies`` to use cookie with longest path. -- by :user:`marq24`.
`7577 <https://github.com/aio-libs/aiohttp/issues/7577>`_
- Fixed display of ``BadStatusLine`` messages from llhttp_. -- by :user:`Dreamsorcerer`
`7651 <https://github.com/aio-libs/aiohttp/issues/7651>`_
----

==================
Security bugfixes
-----------------
- Upgraded the vendored copy of llhttp_ to v8.1.1 -- by :user:`webknjaz`
and :user:`Dreamsorcerer`.
Thanks to :user:`sethmlarson` for reporting this and providing us with
comprehensive reproducer, workarounds and fixing details! For more
information, see
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-45c4-8wx5-qw6w.
.. _llhttp: https://llhttp.org
`7346 <https://github.com/aio-libs/aiohttp/issues/7346>`_
Features
--------
- Added information to C parser exceptions to show which character caused the error. -- by :user:`Dreamsorcerer`
`7366 <https://github.com/aio-libs/aiohttp/issues/7366>`_
Bugfixes
--------
- Fixed a transport is :data:`None` error -- by :user:`Dreamsorcerer`.
`3355 <https://github.com/aio-libs/aiohttp/issues/3355>`_
----

==================
Bugfixes
--------
- Fixed incorrectly overwriting cookies with the same name and domain, but different path.
`6638 <https://github.com/aio-libs/aiohttp/issues/6638>`_
- Fixed ``ConnectionResetError`` not being raised after client disconnection in SSL environments.
`7180 <https://github.com/aio-libs/aiohttp/issues/7180>`_
----

==================
.. attention::
This is the last :doc:`aiohttp <index>` release tested under
Python 3.6. The 3.9 stream is dropping it from the CI and the
distribution package metadata.
Bugfixes
--------
- Increased the upper boundary of the :doc:`multidict:index` dependency
to allow for the version 6 -- by :user:`hugovk`.
It used to be limited below version 7 in :doc:`aiohttp <index>` v3.8.1 but
was lowered in v3.8.2 via :pr:`6550` and never brought back, causing
problems with dependency pins when upgrading. :doc:`aiohttp <index>` v3.8.3
fixes that by recovering the original boundary of ``< 7``.
`6950 <https://github.com/aio-libs/aiohttp/issues/6950>`_
----

=====================================================
Bugfixes
--------
- Support registering OPTIONS HTTP method handlers via RouteTableDef.
`4663 <https://github.com/aio-libs/aiohttp/issues/4663>`_
- Started supporting ``authority-form`` and ``absolute-form`` URLs on the server-side.
`6227 <https://github.com/aio-libs/aiohttp/issues/6227>`_
- Fix Python 3.11 alpha incompatibilities by using Cython 0.29.25
`6396 <https://github.com/aio-libs/aiohttp/issues/6396>`_
- Remove a deprecated usage of pytest.warns(None)
`6663 <https://github.com/aio-libs/aiohttp/issues/6663>`_
- Fix regression where ``asyncio.CancelledError`` occurs on client disconnection.
`6719 <https://github.com/aio-libs/aiohttp/issues/6719>`_
- Export :py:class:`~aiohttp.web.PrefixedSubAppResource` under
:py:mod:`aiohttp.web` -- by :user:`Dreamsorcerer`.
This fixes a regression introduced by :pr:`3469`.
`6889 <https://github.com/aio-libs/aiohttp/issues/6889>`_
- Dropped the :class:`object` type possibility from
the :py:attr:`aiohttp.ClientSession.timeout`
property return type declaration.
`6917 <https://github.com/aio-libs/aiohttp/issues/6917>`_,
`6923 <https://github.com/aio-libs/aiohttp/issues/6923>`_
Improved Documentation
----------------------
- Added clarification on configuring the app object with settings such as a db connection.
`4137 <https://github.com/aio-libs/aiohttp/issues/4137>`_
- Edited the web.run_app declaration.
`6401 <https://github.com/aio-libs/aiohttp/issues/6401>`_
- Dropped the :class:`object` type possibility from
the :py:attr:`aiohttp.ClientSession.timeout`
property return type declaration.
`6917 <https://github.com/aio-libs/aiohttp/issues/6917>`_,
`6923 <https://github.com/aio-libs/aiohttp/issues/6923>`_
Deprecations and Removals
-------------------------
- Drop Python 3.5 support, aiohttp works on 3.6+ now.
`4046 <https://github.com/aio-libs/aiohttp/issues/4046>`_
Misc
----
- `6369 <https://github.com/aio-libs/aiohttp/issues/6369>`_, `#6399 <https://github.com/aio-libs/aiohttp/issues/6399>`_, `#6550 <https://github.com/aio-libs/aiohttp/issues/6550>`_, `#6708 <https://github.com/aio-libs/aiohttp/issues/6708>`_, `#6757 <https://github.com/aio-libs/aiohttp/issues/6757>`_, `#6857 <https://github.com/aio-libs/aiohttp/issues/6857>`_, `#6872 <https://github.com/aio-libs/aiohttp/issues/6872>`_
----

==================
Bugfixes
--------
- Fix the error in handling the return value of `getaddrinfo`.
`getaddrinfo` will return an `(int, bytes)` tuple, if CPython could not handle the address family.
It will cause an index out of range error in aiohttp. For example, if user compile CPython with
`--disable-ipv6` option, but his system enable the ipv6.
`5901 <https://github.com/aio-libs/aiohttp/issues/5901>`_
- Do not install "examples" as a top-level package.
`6189 <https://github.com/aio-libs/aiohttp/issues/6189>`_
- Restored ability to connect IPv6-only host.
`6195 <https://github.com/aio-libs/aiohttp/issues/6195>`_
- Remove ``Signal`` from ``__all__``, replace ``aiohttp.Signal`` with ``aiosignal.Signal`` in docs
`6201 <https://github.com/aio-libs/aiohttp/issues/6201>`_
- Made chunked encoding HTTP header check stricter.
`6305 <https://github.com/aio-libs/aiohttp/issues/6305>`_
Improved Documentation
----------------------
- update quick starter demo codes.
`6240 <https://github.com/aio-libs/aiohttp/issues/6240>`_
- Added an explanation of how tiny timeouts affect performance to the client reference document.
`6274 <https://github.com/aio-libs/aiohttp/issues/6274>`_
- Add flake8-docstrings to flake8 configuration, enable subset of checks.
`6276 <https://github.com/aio-libs/aiohttp/issues/6276>`_
- Added information on running complex applications with additional tasks/processes -- :user:`Dreamsorcerer`.
`6278 <https://github.com/aio-libs/aiohttp/issues/6278>`_
Misc
----
- `6205 <https://github.com/aio-libs/aiohttp/issues/6205>`_
----

==================
Features
--------
- Added a ``GunicornWebWorker`` feature for extending the aiohttp server configuration by allowing the 'wsgi' coroutine to return ``web.AppRunner`` object.
`2988 <https://github.com/aio-libs/aiohttp/issues/2988>`_
- Switch from ``http-parser`` to ``llhttp``
`3561 <https://github.com/aio-libs/aiohttp/issues/3561>`_
- Use Brotli instead of brotlipy
`3803 <https://github.com/aio-libs/aiohttp/issues/3803>`_
- Disable implicit switch-back to pure python mode. The build fails loudly if aiohttp
cannot be compiled with C Accelerators. Use AIOHTTP_NO_EXTENSIONS=1 to explicitly
disable C Extensions complication and switch to Pure-Python mode. Note that Pure-Python
mode is significantly slower than compiled one.
`3828 <https://github.com/aio-libs/aiohttp/issues/3828>`_
- Make access log use local time with timezone
`3853 <https://github.com/aio-libs/aiohttp/issues/3853>`_
- Implemented ``readuntil`` in ``StreamResponse``
`4054 <https://github.com/aio-libs/aiohttp/issues/4054>`_
- FileResponse now supports ETag.
`4594 <https://github.com/aio-libs/aiohttp/issues/4594>`_
- Add a request handler type alias ``aiohttp.typedefs.Handler``.
`4686 <https://github.com/aio-libs/aiohttp/issues/4686>`_
- ``AioHTTPTestCase`` is more async friendly now.
For people who use unittest and are used to use :py:exc:`~unittest.TestCase`
it will be easier to write new test cases like the sync version of the :py:exc:`~unittest.TestCase` class,
without using the decorator `unittest_run_loop`, just `async def test_*`.
The only difference is that for the people using python3.7 and below a new dependency is needed, it is ``asynctestcase``.
`4700 <https://github.com/aio-libs/aiohttp/issues/4700>`_
- Add validation of HTTP header keys and values to prevent header injection.
`4818 <https://github.com/aio-libs/aiohttp/issues/4818>`_
- Add predicate to ``AbstractCookieJar.clear``.
Add ``AbstractCookieJar.clear_domain`` to clean all domain and subdomains cookies only.
`4942 <https://github.com/aio-libs/aiohttp/issues/4942>`_
- Add keepalive_timeout parameter to web.run_app.
`5094 <https://github.com/aio-libs/aiohttp/issues/5094>`_
- Tracing for client sent headers
`5105 <https://github.com/aio-libs/aiohttp/issues/5105>`_
- Make type hints for http parser stricter
`5267 <https://github.com/aio-libs/aiohttp/issues/5267>`_
- Add final declarations for constants.
`5275 <https://github.com/aio-libs/aiohttp/issues/5275>`_
- Switch to external frozenlist and aiosignal libraries.
`5293 <https://github.com/aio-libs/aiohttp/issues/5293>`_
- Don't send secure cookies by insecure transports.
By default, the transport is secure if https or wss scheme is used.
Use `CookieJar(treat_as_secure_origin="http://127.0.0.1")` to override the default security checker.
`5571 <https://github.com/aio-libs/aiohttp/issues/5571>`_
- Always create a new event loop in ``aiohttp.web.run_app()``.
This adds better compatibility with ``asyncio.run()`` or if trying to run multiple apps in sequence.
`5572 <https://github.com/aio-libs/aiohttp/issues/5572>`_
- Add ``aiohttp.pytest_plugin.AiohttpClient`` for static typing of pytest plugin.
`5585 <https://github.com/aio-libs/aiohttp/issues/5585>`_
- Added a ``socket_factory`` argument to ``BaseTestServer``.
`5844 <https://github.com/aio-libs/aiohttp/issues/5844>`_
- Add compression strategy parameter to enable_compression method.
`5909 <https://github.com/aio-libs/aiohttp/issues/5909>`_
- Added support for Python 3.10 to Github Actions CI/CD workflows and fix the related deprecation warnings -- :user:`Hanaasagi`.
`5927 <https://github.com/aio-libs/aiohttp/issues/5927>`_
- Switched ``chardet`` to ``charset-normalizer`` for guessing the HTTP payload body encoding -- :user:`Ousret`.
`5930 <https://github.com/aio-libs/aiohttp/issues/5930>`_
- Added optional auto_decompress argument for HttpRequestParser
`5957 <https://github.com/aio-libs/aiohttp/issues/5957>`_
- Added support for HTTPS proxies to the extent CPython's
:py:mod:`asyncio` supports it -- by :user:`bmbouter`,
:user:`jborean93` and :user:`webknjaz`.
`5992 <https://github.com/aio-libs/aiohttp/issues/5992>`_
- Added ``base_url`` parameter to the initializer of :class:`~aiohttp.ClientSession`.
`6013 <https://github.com/aio-libs/aiohttp/issues/6013>`_
- Add Trove classifier and create binary wheels for 3.10. -- :user:`hugovk`.
`6079 <https://github.com/aio-libs/aiohttp/issues/6079>`_
- Started shipping platform-specific wheels with the ``musl`` tag targeting typical Alpine Linux runtimes — :user:`asvetlov`.
`6139 <https://github.com/aio-libs/aiohttp/issues/6139>`_
- Started shipping platform-specific arm64 wheels for Apple Silicon — :user:`asvetlov`.
`6139 <https://github.com/aio-libs/aiohttp/issues/6139>`_
Bugfixes
--------
- Modify _drain_helper() to handle concurrent `await resp.write(...)` or `ws.send_json(...)` calls without race-condition.
`2934 <https://github.com/aio-libs/aiohttp/issues/2934>`_
- Started using `MultiLoopChildWatcher` when it's available under POSIX while setting up the test I/O loop.
`3450 <https://github.com/aio-libs/aiohttp/issues/3450>`_
- Only encode content-disposition filename parameter using percent-encoding.
Other parameters are encoded to quoted-string or RFC2231 extended parameter
value.
`4012 <https://github.com/aio-libs/aiohttp/issues/4012>`_
- Fixed HTTP client requests to honor ``no_proxy`` environment variables.
`4431 <https://github.com/aio-libs/aiohttp/issues/4431>`_
- Fix supporting WebSockets proxies configured via environment variables.
`4648 <https://github.com/aio-libs/aiohttp/issues/4648>`_
- Change return type on URLDispatcher to UrlMappingMatchInfo to improve type annotations.
`4748 <https://github.com/aio-libs/aiohttp/issues/4748>`_
- Ensure a cleanup context is cleaned up even when an exception occurs during startup.
`4799 <https://github.com/aio-libs/aiohttp/issues/4799>`_
- Added a new exception type for Unix socket client errors which provides a more useful error message.
`4984 <https://github.com/aio-libs/aiohttp/issues/4984>`_
- Remove Transfer-Encoding and Content-Type headers for 204 in StreamResponse
`5106 <https://github.com/aio-libs/aiohttp/issues/5106>`_
- Only depend on typing_extensions for Python <3.8
`5107 <https://github.com/aio-libs/aiohttp/issues/5107>`_
- Add ABNORMAL_CLOSURE and BAD_GATEWAY to WSCloseCode
`5192 <https://github.com/aio-libs/aiohttp/issues/5192>`_
- Fix cookies disappearing from HTTPExceptions.
`5233 <https://github.com/aio-libs/aiohttp/issues/5233>`_
- StaticResource prefixes no longer match URLs with a non-folder prefix. For example ``routes.static('/foo', '/foo')`` no longer matches the URL ``/foobar``. Previously, this would attempt to load the file ``/foo/ar``.
`5250 <https://github.com/aio-libs/aiohttp/issues/5250>`_
- Acquire the connection before running traces to prevent race condition.
`5259 <https://github.com/aio-libs/aiohttp/issues/5259>`_
- Add missing slots to _RequestContextManager`` and ``_WSRequestContextManager``
`5329 <https://github.com/aio-libs/aiohttp/issues/5329>`_
- Ensure sending a zero byte file does not throw an exception (round 2)
`5380 <https://github.com/aio-libs/aiohttp/issues/5380>`_
- Set "text/plain" when data is an empty string in client requests.
`5392 <https://github.com/aio-libs/aiohttp/issues/5392>`_
- Stop automatically releasing the ``ClientResponse`` object on calls to the ``ok`` property for the failed requests.
`5403 <https://github.com/aio-libs/aiohttp/issues/5403>`_
- Include query parameters from `params` keyword argument in tracing `URL`.
`5432 <https://github.com/aio-libs/aiohttp/issues/5432>`_
- Fix annotations
`5466 <https://github.com/aio-libs/aiohttp/issues/5466>`_
- Fixed the multipart POST requests processing to always release file
descriptors for the ``tempfile.Temporaryfile``-created
``_io.BufferedRandom`` instances of files sent within multipart request
bodies via HTTP POST requests -- by :user:`webknjaz`.
`5494 <https://github.com/aio-libs/aiohttp/issues/5494>`_
- Fix 0 being incorrectly treated as an immediate timeout.
`5527 <https://github.com/aio-libs/aiohttp/issues/5527>`_
- Fixes failing tests when an environment variable <scheme>_proxy is set.
`5554 <https://github.com/aio-libs/aiohttp/issues/5554>`_
- Replace deprecated app handler design in ``tests/autobahn/server.py`` with call to ``web.run_app``; replace deprecated ``aiohttp.ws_connect`` calls in ``tests/autobahn/client.py`` with ``aiohttp.ClienSession.ws_connect``.
`5606 <https://github.com/aio-libs/aiohttp/issues/5606>`_
- Fixed test for ``HTTPUnauthorized`` that access the ``text`` argument. This is not used in any part of the code, so it's removed now.
`5657 <https://github.com/aio-libs/aiohttp/issues/5657>`_
- Remove incorrect default from docs
`5727 <https://github.com/aio-libs/aiohttp/issues/5727>`_
- Remove external test dependency to http://httpbin.org
`5840 <https://github.com/aio-libs/aiohttp/issues/5840>`_
- Don't cancel current task when entering a cancelled timer.
`5853 <https://github.com/aio-libs/aiohttp/issues/5853>`_
- Added ``params`` keyword argument to ``ClientSession.ws_connect``. -- :user:`hoh`.
`5868 <https://github.com/aio-libs/aiohttp/issues/5868>`_
- Uses :py:class:`~asyncio.ThreadedChildWatcher` under POSIX to allow setting up test loop in non-main thread.
`5877 <https://github.com/aio-libs/aiohttp/issues/5877>`_
- Fix the error in handling the return value of `getaddrinfo`.
`getaddrinfo` will return an `(int, bytes)` tuple, if CPython could not handle the address family.
It will cause a index out of range error in aiohttp. For example, if user compile CPython with
`--disable-ipv6` option but his system enable the ipv6.
`5901 <https://github.com/aio-libs/aiohttp/issues/5901>`_
- Removed the deprecated ``loop`` argument from the ``asyncio.sleep``/``gather`` calls
`5905 <https://github.com/aio-libs/aiohttp/issues/5905>`_
- Return ``None`` from ``request.if_modified_since``, ``request.if_unmodified_since``, ``request.if_range`` and ``response.last_modified`` when corresponding http date headers are invalid.
`5925 <https://github.com/aio-libs/aiohttp/issues/5925>`_
- Fix resetting `SIGCHLD` signals in Gunicorn aiohttp Worker to fix `subprocesses` that capture output having an incorrect `returncode`.
`6130 <https://github.com/aio-libs/aiohttp/issues/6130>`_
- Raise ``400: Content-Length can't be present with Transfer-Encoding`` if both ``Content-Length`` and ``Transfer-Encoding`` are sent by peer by both C and Python implementations
`6182 <https://github.com/aio-libs/aiohttp/issues/6182>`_
Improved Documentation
----------------------
- Refactored OpenAPI/Swagger aiohttp addons, added ``aio-openapi``
`5326 <https://github.com/aio-libs/aiohttp/issues/5326>`_
- Fixed docs on request cookies type, so it matches what is actually used in the code (a
read-only dictionary-like object).
`5725 <https://github.com/aio-libs/aiohttp/issues/5725>`_
- Documented that the HTTP client ``Authorization`` header is removed
on redirects to a different host or protocol.
`5850 <https://github.com/aio-libs/aiohttp/issues/5850>`_
Misc
----
- `3927 <https://github.com/aio-libs/aiohttp/issues/3927>`_, `#4247 <https://github.com/aio-libs/aiohttp/issues/4247>`_, `#4247 <https://github.com/aio-libs/aiohttp/issues/4247>`_, `#5389 <https://github.com/aio-libs/aiohttp/issues/5389>`_, `#5457 <https://github.com/aio-libs/aiohttp/issues/5457>`_, `#5486 <https://github.com/aio-libs/aiohttp/issues/5486>`_, `#5494 <https://github.com/aio-libs/aiohttp/issues/5494>`_, `#5515 <https://github.com/aio-libs/aiohttp/issues/5515>`_, `#5625 <https://github.com/aio-libs/aiohttp/issues/5625>`_, `#5635 <https://github.com/aio-libs/aiohttp/issues/5635>`_, `#5648 <https://github.com/aio-libs/aiohttp/issues/5648>`_, `#5657 <https://github.com/aio-libs/aiohttp/issues/5657>`_, `#5890 <https://github.com/aio-libs/aiohttp/issues/5890>`_, `#5914 <https://github.com/aio-libs/aiohttp/issues/5914>`_, `#5932 <https://github.com/aio-libs/aiohttp/issues/5932>`_, `#6002 <https://github.com/aio-libs/aiohttp/issues/6002>`_, `#6045 <https://github.com/aio-libs/aiohttp/issues/6045>`_, `#6131 <https://github.com/aio-libs/aiohttp/issues/6131>`_, `#6156 <https://github.com/aio-libs/aiohttp/issues/6156>`_, `#6165 <https://github.com/aio-libs/aiohttp/issues/6165>`_, `#6166 <https://github.com/aio-libs/aiohttp/issues/6166>`_
----

========================
Misc
----
- Bumped upper bound of the ``chardet`` runtime dependency
to allow their v4.0 version stream.
`5366 <https://github.com/aio-libs/aiohttp/issues/5366>`_
----

==================
Bugfixes
--------
- **(SECURITY BUG)** Started preventing open redirects in the
``aiohttp.web.normalize_path_middleware`` middleware. For
more details, see
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-v6wp-4m6f-gcjg.
Thanks to `Beast Glatisant <https://github.com/g147>`__ for
finding the first instance of this issue and `Jelmer Vernooij
<https://jelmer.uk/>`__ for reporting and tracking it down
in aiohttp.
`5497 <https://github.com/aio-libs/aiohttp/issues/5497>`_
- Fix interpretation difference of the pure-Python and the Cython-based
HTTP parsers construct a ``yarl.URL`` object for HTTP request-target.
Before this fix, the Python parser would turn the URI's absolute-path
for ``//some-path`` into ``/`` while the Cython code preserved it as
``//some-path``. Now, both do the latter.
`5498 <https://github.com/aio-libs/aiohttp/issues/5498>`_
----

==================
Features
--------
- Use Brotli instead of brotlipy
`3803 <https://github.com/aio-libs/aiohttp/issues/3803>`_
- Made exceptions pickleable. Also changed the repr of some exceptions.
`4077 <https://github.com/aio-libs/aiohttp/issues/4077>`_
Bugfixes
--------
- Raise a ClientResponseError instead of an AssertionError for a blank
HTTP Reason Phrase.
`3532 <https://github.com/aio-libs/aiohttp/issues/3532>`_
- Fix ``web_middlewares.normalize_path_middleware`` behavior for patch without slash.
`3669 <https://github.com/aio-libs/aiohttp/issues/3669>`_
- Fix overshadowing of overlapped sub-applications prefixes.
`3701 <https://github.com/aio-libs/aiohttp/issues/3701>`_
- Make `BaseConnector.close()` a coroutine and wait until the client closes all connections. Drop deprecated "with Connector():" syntax.
`3736 <https://github.com/aio-libs/aiohttp/issues/3736>`_
- Reset the ``sock_read`` timeout each time data is received for a ``aiohttp.client`` response.
`3808 <https://github.com/aio-libs/aiohttp/issues/3808>`_
- Fixed type annotation for add_view method of UrlDispatcher to accept any subclass of View
`3880 <https://github.com/aio-libs/aiohttp/issues/3880>`_
- Fixed querying the address families from DNS that the current host supports.
`5156 <https://github.com/aio-libs/aiohttp/issues/5156>`_
- Change return type of MultipartReader.__aiter__() and BodyPartReader.__aiter__() to AsyncIterator.
`5163 <https://github.com/aio-libs/aiohttp/issues/5163>`_
- Provide x86 Windows wheels.
`5230 <https://github.com/aio-libs/aiohttp/issues/5230>`_
Improved Documentation
----------------------
- Add documentation for ``aiohttp.web.FileResponse``.
`3958 <https://github.com/aio-libs/aiohttp/issues/3958>`_
- Removed deprecation warning in tracing example docs
`3964 <https://github.com/aio-libs/aiohttp/issues/3964>`_
- Fixed wrong "Usage" docstring of ``aiohttp.client.request``.
`4603 <https://github.com/aio-libs/aiohttp/issues/4603>`_
- Add aiohttp-pydantic to third party libraries
`5228 <https://github.com/aio-libs/aiohttp/issues/5228>`_
Misc
----
- `4102 <https://github.com/aio-libs/aiohttp/issues/4102>`_
----

==================
Bugfixes
--------
- Fixed static files handling for loops without ``.sendfile()`` support
`5149 <https://github.com/aio-libs/aiohttp/issues/5149>`_
----

==================
Bugfixes
--------
- Fixed a type error caused by the conditional import of `Protocol`.
`5111 <https://github.com/aio-libs/aiohttp/issues/5111>`_
- Server doesn't send Content-Length for 1xx or 204
`4901 <https://github.com/aio-libs/aiohttp/issues/4901>`_
- Fix run_app typing
`4957 <https://github.com/aio-libs/aiohttp/issues/4957>`_
- Always require ``typing_extensions`` library.
`5107 <https://github.com/aio-libs/aiohttp/issues/5107>`_
- Fix a variable-shadowing bug causing `ThreadedResolver.resolve` to
return the resolved IP as the ``hostname`` in each record, which prevented
validation of HTTPS connections.
`5110 <https://github.com/aio-libs/aiohttp/issues/5110>`_
- Added annotations to all public attributes.
`5115 <https://github.com/aio-libs/aiohttp/issues/5115>`_
- Fix flaky test_when_timeout_smaller_second
`5116 <https://github.com/aio-libs/aiohttp/issues/5116>`_
- Ensure sending a zero byte file does not throw an exception
`5124 <https://github.com/aio-libs/aiohttp/issues/5124>`_
- Fix a bug in ``web.run_app()`` about Python version checking on Windows
`5127 <https://github.com/aio-libs/aiohttp/issues/5127>`_
----

==================
Features
--------
- Response headers are now prepared prior to running ``on_response_prepare`` hooks, directly before headers are sent to the client.
`1958 <https://github.com/aio-libs/aiohttp/issues/1958>`_
- Add a ``quote_cookie`` option to ``CookieJar``, a way to skip quotation wrapping of cookies containing special characters.
`2571 <https://github.com/aio-libs/aiohttp/issues/2571>`_
- Call ``AccessLogger.log`` with the current exception available from ``sys.exc_info()``.
`3557 <https://github.com/aio-libs/aiohttp/issues/3557>`_
- `web.UrlDispatcher.add_routes` and `web.Application.add_routes` return a list
of registered `AbstractRoute` instances. `AbstractRouteDef.register` (and all
subclasses) return a list of registered resources registered resource.
`3866 <https://github.com/aio-libs/aiohttp/issues/3866>`_
- Added properties of default ClientSession params to ClientSession class so it is available for introspection
`3882 <https://github.com/aio-libs/aiohttp/issues/3882>`_
- Don't cancel web handler on peer disconnection, raise `OSError` on reading/writing instead.
`4080 <https://github.com/aio-libs/aiohttp/issues/4080>`_
- Implement BaseRequest.get_extra_info() to access a protocol transports' extra info.
`4189 <https://github.com/aio-libs/aiohttp/issues/4189>`_
- Added `ClientSession.timeout` property.
`4191 <https://github.com/aio-libs/aiohttp/issues/4191>`_
- allow use of SameSite in cookies.
`4224 <https://github.com/aio-libs/aiohttp/issues/4224>`_
- Use ``loop.sendfile()`` instead of custom implementation if available.
`4269 <https://github.com/aio-libs/aiohttp/issues/4269>`_
- Apply SO_REUSEADDR to test server's socket.
`4393 <https://github.com/aio-libs/aiohttp/issues/4393>`_
- Use .raw_host instead of slower .host in client API
`4402 <https://github.com/aio-libs/aiohttp/issues/4402>`_
- Allow configuring the buffer size of input stream by passing ``read_bufsize`` argument.
`4453 <https://github.com/aio-libs/aiohttp/issues/4453>`_
- Pass tests on Python 3.8 for Windows.
`4513 <https://github.com/aio-libs/aiohttp/issues/4513>`_
- Add `method` and `url` attributes to `TraceRequestChunkSentParams` and `TraceResponseChunkReceivedParams`.
`4674 <https://github.com/aio-libs/aiohttp/issues/4674>`_
- Add ClientResponse.ok property for checking status code under 400.
`4711 <https://github.com/aio-libs/aiohttp/issues/4711>`_
- Don't ceil timeouts that are smaller than 5 seconds.
`4850 <https://github.com/aio-libs/aiohttp/issues/4850>`_
- TCPSite now listens by default on all interfaces instead of just IPv4 when `None` is passed in as the host.
`4894 <https://github.com/aio-libs/aiohttp/issues/4894>`_
- Bump ``http_parser`` to 2.9.4
`5070 <https://github.com/aio-libs/aiohttp/issues/5070>`_
Bugfixes
--------
- Fix keepalive connections not being closed in time
`3296 <https://github.com/aio-libs/aiohttp/issues/3296>`_
- Fix failed websocket handshake leaving connection hanging.
`3380 <https://github.com/aio-libs/aiohttp/issues/3380>`_
- Fix tasks cancellation order on exit. The run_app task needs to be cancelled first for cleanup hooks to run with all tasks intact.
`3805 <https://github.com/aio-libs/aiohttp/issues/3805>`_
- Don't start heartbeat until _writer is set
`4062 <https://github.com/aio-libs/aiohttp/issues/4062>`_
- Fix handling of multipart file uploads without a content type.
`4089 <https://github.com/aio-libs/aiohttp/issues/4089>`_
- Preserve view handler function attributes across middlewares
`4174 <https://github.com/aio-libs/aiohttp/issues/4174>`_
- Fix the string representation of ``ServerDisconnectedError``.
`4175 <https://github.com/aio-libs/aiohttp/issues/4175>`_
- Raising RuntimeError when trying to get encoding from not read body
`4214 <https://github.com/aio-libs/aiohttp/issues/4214>`_
- Remove warning messages from noop.
`4282 <https://github.com/aio-libs/aiohttp/issues/4282>`_
- Raise ClientPayloadError if FormData re-processed.
`4345 <https://github.com/aio-libs/aiohttp/issues/4345>`_
- Fix a warning about unfinished task in ``web_protocol.py``
`4408 <https://github.com/aio-libs/aiohttp/issues/4408>`_
- Fixed 'deflate' compression. According to RFC 2616 now.
`4506 <https://github.com/aio-libs/aiohttp/issues/4506>`_
- Fixed OverflowError on platforms with 32-bit time_t
`4515 <https://github.com/aio-libs/aiohttp/issues/4515>`_
- Fixed request.body_exists returns wrong value for methods without body.
`4528 <https://github.com/aio-libs/aiohttp/issues/4528>`_
- Fix connecting to link-local IPv6 addresses.
`4554 <https://github.com/aio-libs/aiohttp/issues/4554>`_
- Fix a problem with connection waiters that are never awaited.
`4562 <https://github.com/aio-libs/aiohttp/issues/4562>`_
- Always make sure transport is not closing before reuse a connection.
Reuse a protocol based on keepalive in headers is unreliable.
For example, uWSGI will not support keepalive even it serves a
HTTP 1.1 request, except explicitly configure uWSGI with a
``--http-keepalive`` option.
Servers designed like uWSGI could cause aiohttp intermittently
raise a ConnectionResetException when the protocol poll runs
out and some protocol is reused.
`4587 <https://github.com/aio-libs/aiohttp/issues/4587>`_
- Handle the last CRLF correctly even if it is received via separate TCP segment.
`4630 <https://github.com/aio-libs/aiohttp/issues/4630>`_
- Fix the register_resource function to validate route name before splitting it so that route name can include python keywords.
`4691 <https://github.com/aio-libs/aiohttp/issues/4691>`_
- Improve typing annotations for ``web.Request``, ``aiohttp.ClientResponse`` and
``multipart`` module.
`4736 <https://github.com/aio-libs/aiohttp/issues/4736>`_
- Fix resolver task is not awaited when connector is cancelled
`4795 <https://github.com/aio-libs/aiohttp/issues/4795>`_
- Fix a bug "Aiohttp doesn't return any error on invalid request methods"
`4798 <https://github.com/aio-libs/aiohttp/issues/4798>`_
- Fix HEAD requests for static content.
`4809 <https://github.com/aio-libs/aiohttp/issues/4809>`_
- Fix incorrect size calculation for memoryview
`4890 <https://github.com/aio-libs/aiohttp/issues/4890>`_
- Add HTTPMove to _all__.
`4897 <https://github.com/aio-libs/aiohttp/issues/4897>`_
- Fixed the type annotations in the ``tracing`` module.
`4912 <https://github.com/aio-libs/aiohttp/issues/4912>`_
- Fix typing for multipart ``__aiter__``.
`4931 <https://github.com/aio-libs/aiohttp/issues/4931>`_
- Fix for race condition on connections in BaseConnector that leads to exceeding the connection limit.
`4936 <https://github.com/aio-libs/aiohttp/issues/4936>`_
- Add forced UTF-8 encoding for ``application/rdap+json`` responses.
`4938 <https://github.com/aio-libs/aiohttp/issues/4938>`_
- Fix inconsistency between Python and C http request parsers in parsing pct-encoded URL.
`4972 <https://github.com/aio-libs/aiohttp/issues/4972>`_
- Fix connection closing issue in HEAD request.
`5012 <https://github.com/aio-libs/aiohttp/issues/5012>`_
- Fix type hint on BaseRunner.addresses (from ``List[str]`` to ``List[Any]``)
`5086 <https://github.com/aio-libs/aiohttp/issues/5086>`_
- Make `web.run_app()` more responsive to Ctrl+C on Windows for Python < 3.8. It slightly
increases CPU load as a side effect.
`5098 <https://github.com/aio-libs/aiohttp/issues/5098>`_
Improved Documentation
----------------------
- Fix example code in client quick-start
`3376 <https://github.com/aio-libs/aiohttp/issues/3376>`_
- Updated the docs so there is no contradiction in ``ttl_dns_cache`` default value
`3512 <https://github.com/aio-libs/aiohttp/issues/3512>`_
- Add 'Deploy with SSL' to docs.
`4201 <https://github.com/aio-libs/aiohttp/issues/4201>`_
- Change typing of the secure argument on StreamResponse.set_cookie from ``Optional[str]`` to ``Optional[bool]``
`4204 <https://github.com/aio-libs/aiohttp/issues/4204>`_
- Changes ``ttl_dns_cache`` type from int to Optional[int].
`4270 <https://github.com/aio-libs/aiohttp/issues/4270>`_
- Simplify README hello word example and add a documentation page for people coming from requests.
`4272 <https://github.com/aio-libs/aiohttp/issues/4272>`_
- Improve some code examples in the documentation involving websockets and starting a simple HTTP site with an AppRunner.
`4285 <https://github.com/aio-libs/aiohttp/issues/4285>`_
- Fix typo in code example in Multipart docs
`4312 <https://github.com/aio-libs/aiohttp/issues/4312>`_
- Fix code example in Multipart section.
`4314 <https://github.com/aio-libs/aiohttp/issues/4314>`_
- Update contributing guide so new contributors read the most recent version of that guide. Update command used to create test coverage reporting.
`4810 <https://github.com/aio-libs/aiohttp/issues/4810>`_
- Spelling: Change "canonize" to "canonicalize".
`4986 <https://github.com/aio-libs/aiohttp/issues/4986>`_
- Add ``aiohttp-sse-client`` library to third party usage list.
`5084 <https://github.com/aio-libs/aiohttp/issues/5084>`_
Misc
----
- `2856 <https://github.com/aio-libs/aiohttp/issues/2856>`_, `#4218 <https://github.com/aio-libs/aiohttp/issues/4218>`_, `#4250 <https://github.com/aio-libs/aiohttp/issues/4250>`_
----

==================
Bugfixes
--------
- Pin yarl to ``<1.6.0`` to avoid buggy behavior that will be fixed by the next aiohttp
release.

==================
Features
--------
- Made exceptions pickleable. Also changed the repr of some exceptions.
`4077 <https://github.com/aio-libs/aiohttp/issues/4077>`_
- Use ``Iterable`` type hint instead of ``Sequence`` for ``Application`` *middleware*
parameter. `4125 <https://github.com/aio-libs/aiohttp/issues/4125>`_
Bugfixes
--------
- Reset the ``sock_read`` timeout each time data is received for a
``aiohttp.ClientResponse``. `3808
<https://github.com/aio-libs/aiohttp/issues/3808>`_
- Fix handling of expired cookies so they are not stored in CookieJar.
`4063 <https://github.com/aio-libs/aiohttp/issues/4063>`_
- Fix misleading message in the string representation of ``ClientConnectorError``;
``self.ssl == None`` means default SSL context, not SSL disabled `4097
<https://github.com/aio-libs/aiohttp/issues/4097>`_
- Don't clobber HTTP status when using FileResponse.
`4106 <https://github.com/aio-libs/aiohttp/issues/4106>`_
Improved Documentation
----------------------
- Added minimal required logging configuration to logging documentation.
`2469 <https://github.com/aio-libs/aiohttp/issues/2469>`_
- Update docs to reflect proxy support.
`4100 <https://github.com/aio-libs/aiohttp/issues/4100>`_
- Fix typo in code example in testing docs.
`4108 <https://github.com/aio-libs/aiohttp/issues/4108>`_
Misc
----
- `4102 <https://github.com/aio-libs/aiohttp/issues/4102>`_
----

==================
Features
--------
- Compatibility with Python 3.8.
`4056 <https://github.com/aio-libs/aiohttp/issues/4056>`_
Bugfixes
--------
- correct some exception string format
`4068 <https://github.com/aio-libs/aiohttp/issues/4068>`_
- Emit a warning when ``ssl.OP_NO_COMPRESSION`` is
unavailable because the runtime is built against
an outdated OpenSSL.
`4052 <https://github.com/aio-libs/aiohttp/issues/4052>`_
- Update multidict requirement to >= 4.5
`4057 <https://github.com/aio-libs/aiohttp/issues/4057>`_
Improved Documentation
----------------------
- Provide pytest-aiohttp namespace for pytest fixtures in docs.
`3723 <https://github.com/aio-libs/aiohttp/issues/3723>`_
----

==================
Features
--------
- Add support for Named Pipes (Site and Connector) under Windows. This feature requires
Proactor event loop to work. `3629
<https://github.com/aio-libs/aiohttp/issues/3629>`_
- Removed ``Transfer-Encoding: chunked`` header from websocket responses to be
compatible with more http proxy servers. `3798
<https://github.com/aio-libs/aiohttp/issues/3798>`_
- Accept non-GET request for starting websocket handshake on server side.
`3980 <https://github.com/aio-libs/aiohttp/issues/3980>`_
Bugfixes
--------
- Raise a ClientResponseError instead of an AssertionError for a blank
HTTP Reason Phrase.
`3532 <https://github.com/aio-libs/aiohttp/issues/3532>`_
- Fix an issue where cookies would sometimes not be set during a redirect.
`3576 <https://github.com/aio-libs/aiohttp/issues/3576>`_
- Change normalize_path_middleware to use '308 Permanent Redirect' instead of 301.
This behavior should prevent clients from being unable to use PUT/POST
methods on endpoints that are redirected because of a trailing slash.
`3579 <https://github.com/aio-libs/aiohttp/issues/3579>`_
- Drop the processed task from ``all_tasks()`` list early. It prevents logging about a
task with unhandled exception when the server is used in conjunction with
``asyncio.run()``. `3587 <https://github.com/aio-libs/aiohttp/issues/3587>`_
- ``Signal`` type annotation changed from ``Signal[Callable[['TraceConfig'],
Awaitable[None]]]`` to ``Signal[Callable[ClientSession, SimpleNamespace, ...]``.
`3595 <https://github.com/aio-libs/aiohttp/issues/3595>`_
- Use sanitized URL as Location header in redirects
`3614 <https://github.com/aio-libs/aiohttp/issues/3614>`_
- Improve typing annotations for multipart.py along with changes required
by mypy in files that references multipart.py.
`3621 <https://github.com/aio-libs/aiohttp/issues/3621>`_
- Close session created inside ``aiohttp.request`` when unhandled exception occurs
`3628 <https://github.com/aio-libs/aiohttp/issues/3628>`_
- Cleanup per-chunk data in generic data read. Memory leak fixed.
`3631 <https://github.com/aio-libs/aiohttp/issues/3631>`_
- Use correct type for add_view and family
`3633 <https://github.com/aio-libs/aiohttp/issues/3633>`_
- Fix _keepalive field in __slots__ of ``RequestHandler``.
`3644 <https://github.com/aio-libs/aiohttp/issues/3644>`_
- Properly handle ConnectionResetError, to silence the "Cannot write to closing
transport" exception when clients disconnect uncleanly.
`3648 <https://github.com/aio-libs/aiohttp/issues/3648>`_
- Suppress pytest warnings due to ``test_utils`` classes
`3660 <https://github.com/aio-libs/aiohttp/issues/3660>`_
- Fix overshadowing of overlapped sub-application prefixes.
`3701 <https://github.com/aio-libs/aiohttp/issues/3701>`_
- Fixed return type annotation for WSMessage.json()
`3720 <https://github.com/aio-libs/aiohttp/issues/3720>`_
- Properly expose TooManyRedirects publicly as documented.
`3818 <https://github.com/aio-libs/aiohttp/issues/3818>`_
- Fix missing brackets for IPv6 in proxy CONNECT request
`3841 <https://github.com/aio-libs/aiohttp/issues/3841>`_
- Make the signature of ``aiohttp.test_utils.TestClient.request`` match
``asyncio.ClientSession.request`` according to the docs `3852
<https://github.com/aio-libs/aiohttp/issues/3852>`_
- Use correct style for re-exported imports, makes mypy ``--strict`` mode happy.
`3868 <https://github.com/aio-libs/aiohttp/issues/3868>`_
- Fixed type annotation for add_view method of UrlDispatcher to accept any subclass of
View `3880 <https://github.com/aio-libs/aiohttp/issues/3880>`_
- Made cython HTTP parser set Reason-Phrase of the response to an empty string if it is
missing. `3906 <https://github.com/aio-libs/aiohttp/issues/3906>`_
- Add URL to the string representation of ClientResponseError.
`3959 <https://github.com/aio-libs/aiohttp/issues/3959>`_
- Accept ``istr`` keys in ``LooseHeaders`` type hints.
`3976 <https://github.com/aio-libs/aiohttp/issues/3976>`_
- Fixed race conditions in _resolve_host caching and throttling when tracing is enabled.
`4013 <https://github.com/aio-libs/aiohttp/issues/4013>`_
- For URLs like "unix://localhost/..." set Host HTTP header to "localhost" instead of
"localhost:None". `4039 <https://github.com/aio-libs/aiohttp/issues/4039>`_
Improved Documentation
----------------------
- Modify documentation for Background Tasks to remove deprecated usage of event loop.
`3526 <https://github.com/aio-libs/aiohttp/issues/3526>`_
- use ``if __name__ == '__main__':`` in server examples.
`3775 <https://github.com/aio-libs/aiohttp/issues/3775>`_
- Update documentation reference to the default access logger.
`3783 <https://github.com/aio-libs/aiohttp/issues/3783>`_
- Improve documentation for ``web.BaseRequest.path`` and ``web.BaseRequest.raw_path``.
`3791 <https://github.com/aio-libs/aiohttp/issues/3791>`_
- Removed deprecation warning in tracing example docs
`3964 <https://github.com/aio-libs/aiohttp/issues/3964>`_
----

==================
Bugfixes
--------
- Fix stream ``.read()`` / ``.readany()`` / ``.iter_any()`` which used to return a
partial content only in case of compressed content
`3525 <https://github.com/aio-libs/aiohttp/issues/3525>`_

==================
Bugfixes
--------
- Fix type stubs for ``aiohttp.web.run_app(access_log=True)`` and fix edge case of
``access_log=True`` and the event loop being in debug mode. `3504
<https://github.com/aio-libs/aiohttp/issues/3504>`_
- Fix ``aiohttp.ClientTimeout`` type annotations to accept ``None`` for fields
`3511 <https://github.com/aio-libs/aiohttp/issues/3511>`_
- Send custom per-request cookies even if session jar is empty
`3515 <https://github.com/aio-libs/aiohttp/issues/3515>`_
- Restore Linux binary wheels publishing on PyPI
----

==================
Features
--------
- ``FileResponse`` from ``web_fileresponse.py`` uses a ``ThreadPoolExecutor`` to work
with files asynchronously. I/O based payloads from ``payload.py`` uses a
``ThreadPoolExecutor`` to work with I/O objects asynchronously. `3313
<https://github.com/aio-libs/aiohttp/issues/3313>`_
- Internal Server Errors in plain text if the browser does not support HTML.
`3483 <https://github.com/aio-libs/aiohttp/issues/3483>`_
Bugfixes
--------
- Preserve MultipartWriter parts headers on write. Refactor the way how
``Payload.headers`` are handled. Payload instances now always have headers and
Content-Type defined. Fix Payload Content-Disposition header reset after initial
creation. `3035 <https://github.com/aio-libs/aiohttp/issues/3035>`_
- Log suppressed exceptions in ``GunicornWebWorker``.
`3464 <https://github.com/aio-libs/aiohttp/issues/3464>`_
- Remove wildcard imports.
`3468 <https://github.com/aio-libs/aiohttp/issues/3468>`_
- Use the same task for app initialization and web server handling in gunicorn workers.
It allows to use Python3.7 context vars smoothly.
`3471 <https://github.com/aio-libs/aiohttp/issues/3471>`_
- Fix handling of chunked+gzipped response when first chunk does not give uncompressed
data `3477 <https://github.com/aio-libs/aiohttp/issues/3477>`_
- Replace ``collections.MutableMapping`` with ``collections.abc.MutableMapping`` to
avoid a deprecation warning. `3480
<https://github.com/aio-libs/aiohttp/issues/3480>`_
- ``Payload.size`` type annotation changed from ``Optional[float]`` to
``Optional[int]``. `3484 <https://github.com/aio-libs/aiohttp/issues/3484>`_
- Ignore done tasks when cancels pending activities on ``web.run_app`` finalization.
`3497 <https://github.com/aio-libs/aiohttp/issues/3497>`_
Improved Documentation
----------------------
- Add documentation for ``aiohttp.web.HTTPException``.
`3490 <https://github.com/aio-libs/aiohttp/issues/3490>`_
Misc
----
- `3487 <https://github.com/aio-libs/aiohttp/issues/3487>`_
----

====================
- Fix a regression about ``ClientSession._requote_redirect_url`` modification in debug
mode.

====================
Features
--------
- The library type annotations are checked in strict mode now.
- Add support for setting cookies for individual request (`2387
<https://github.com/aio-libs/aiohttp/pull/2387>`_)
- Application.add_domain implementation (`2809
<https://github.com/aio-libs/aiohttp/pull/2809>`_)
- The default ``app`` in the request returned by ``test_utils.make_mocked_request`` can
now have objects assigned to it and retrieved using the ``[]`` operator. (`3174
<https://github.com/aio-libs/aiohttp/pull/3174>`_)
- Make ``request.url`` accessible when transport is closed. (`3177
<https://github.com/aio-libs/aiohttp/pull/3177>`_)
- Add ``zlib_executor_size`` argument to ``Response`` constructor to allow compression
to run in a background executor to avoid blocking the main thread and potentially
triggering health check failures. (`3205
<https://github.com/aio-libs/aiohttp/pull/3205>`_)
- Enable users to set ``ClientTimeout`` in ``aiohttp.request`` (`3213
<https://github.com/aio-libs/aiohttp/pull/3213>`_)
- Don't raise a warning if ``NETRC`` environment variable is not set and ``~/.netrc``
file doesn't exist. (`3267 <https://github.com/aio-libs/aiohttp/pull/3267>`_)
- Add default logging handler to web.run_app If the ``Application.debug flag is set
and the default logger ``aiohttp.access`` is used, access logs will now be output
using a *stderr* ``StreamHandler`` if no handlers are attached. Furthermore, if the
default logger has no log level set, the log level will be set to ``DEBUG``. (`3324
<https://github.com/aio-libs/aiohttp/pull/3324>`_)
- Add method argument to ``session.ws_connect()``. Sometimes server API requires a
different HTTP method for WebSocket connection establishment. For example, ``Docker
exec`` needs POST. (`3378 <https://github.com/aio-libs/aiohttp/pull/3378>`_)
- Create a task per request handling. (`3406
<https://github.com/aio-libs/aiohttp/pull/3406>`_)
Bugfixes
--------
- Enable passing ``access_log_class`` via ``handler_args`` (`3158
<https://github.com/aio-libs/aiohttp/pull/3158>`_)
- Return empty bytes with end-of-chunk marker in empty stream reader. (`3186
<https://github.com/aio-libs/aiohttp/pull/3186>`_)
- Accept ``CIMultiDictProxy`` instances for ``headers`` argument in ``web.Response``
constructor. (`3207 <https://github.com/aio-libs/aiohttp/pull/3207>`_)
- Don't uppercase HTTP method in parser (`3233
<https://github.com/aio-libs/aiohttp/pull/3233>`_)
- Make method match regexp RFC-7230 compliant (`3235
<https://github.com/aio-libs/aiohttp/pull/3235>`_)
- Add ``app.pre_frozen`` state to properly handle startup signals in
sub-applications. (`3237 <https://github.com/aio-libs/aiohttp/pull/3237>`_)
- Enhanced parsing and validation of helpers.BasicAuth.decode. (`3239
<https://github.com/aio-libs/aiohttp/pull/3239>`_)
- Change imports from collections module in preparation for 3.8. (`3258
<https://github.com/aio-libs/aiohttp/pull/3258>`_)
- Ensure Host header is added first to ClientRequest to better replicate browser (`3265
<https://github.com/aio-libs/aiohttp/pull/3265>`_)
- Fix forward compatibility with Python 3.8: importing ABCs directly from the
collections module will not be supported anymore. (`3273
<https://github.com/aio-libs/aiohttp/pull/3273>`_)
- Keep the query string by ``normalize_path_middleware``. (`3278
<https://github.com/aio-libs/aiohttp/pull/3278>`_)
- Fix missing parameter ``raise_for_status`` for aiohttp.request() (`3290
<https://github.com/aio-libs/aiohttp/pull/3290>`_)
- Bracket IPv6 addresses in the HOST header (`3304
<https://github.com/aio-libs/aiohttp/pull/3304>`_)
- Fix default message for server ping and pong frames. (`3308
<https://github.com/aio-libs/aiohttp/pull/3308>`_)
- Fix tests/test_connector.py typo and tests/autobahn/server.py duplicate loop
def. (`3337 <https://github.com/aio-libs/aiohttp/pull/3337>`_)
- Fix false-negative indicator end_of_HTTP_chunk in StreamReader.readchunk function
(`3361 <https://github.com/aio-libs/aiohttp/pull/3361>`_)
- Release HTTP response before raising status exception (`3364
<https://github.com/aio-libs/aiohttp/pull/3364>`_)
- Fix task cancellation when ``sendfile()`` syscall is used by static file
handling. (`3383 <https://github.com/aio-libs/aiohttp/pull/3383>`_)
- Fix stack trace for ``asyncio.TimeoutError`` which was not logged, when it is caught
in the handler. (`3414 <https://github.com/aio-libs/aiohttp/pull/3414>`_)
Improved Documentation
----------------------
- Improve documentation of ``Application.make_handler`` parameters. (`3152
<https://github.com/aio-libs/aiohttp/pull/3152>`_)
- Fix BaseRequest.raw_headers doc. (`3215
<https://github.com/aio-libs/aiohttp/pull/3215>`_)
- Fix typo in TypeError exception reason in ``web.Application._handle`` (`3229
<https://github.com/aio-libs/aiohttp/pull/3229>`_)
- Make server access log format placeholder %b documentation reflect
behavior and docstring. (`3307 <https://github.com/aio-libs/aiohttp/pull/3307>`_)
Deprecations and Removals
-------------------------
- Deprecate modification of ``session.requote_redirect_url`` (`2278
<https://github.com/aio-libs/aiohttp/pull/2278>`_)
- Deprecate ``stream.unread_data()`` (`3260
<https://github.com/aio-libs/aiohttp/pull/3260>`_)
- Deprecated use of boolean in ``resp.enable_compression()`` (`3318
<https://github.com/aio-libs/aiohttp/pull/3318>`_)
- Encourage creation of aiohttp public objects inside a coroutine (`3331
&l