Aiohttp

==================

- Fix ``iter_chunks`` type annotation (`3230 <https://github.com/aio-libs/aiohttp/pull/3230>`_)

==================

- Fix empty header parsing regression. (`3218 <https://github.com/aio-libs/aiohttp/pull/3218>`_)
- Fix BaseRequest.raw_headers doc. (`3215 <https://github.com/aio-libs/aiohttp/pull/3215>`_)
- Fix documentation building on ReadTheDocs (`3221 <https://github.com/aio-libs/aiohttp/pull/3221>`_)

==================

Features
--------

- Add type hints (`3049 <https://github.com/aio-libs/aiohttp/pull/3049>`_)
- Add ``raise_for_status`` request parameter (`3073 <https://github.com/aio-libs/aiohttp/pull/3073>`_)
- Add type hints to HTTP client (`3092 <https://github.com/aio-libs/aiohttp/pull/3092>`_)
- Minor server optimizations (`3095 <https://github.com/aio-libs/aiohttp/pull/3095>`_)
- Preserve the cause when `HTTPException` is raised from another exception. (`3096 <https://github.com/aio-libs/aiohttp/pull/3096>`_)
- Add `close_boundary` option in `MultipartWriter.write` method. Support streaming (`3104 <https://github.com/aio-libs/aiohttp/pull/3104>`_)
- Added a ``remove_slash`` option to the ``normalize_path_middleware`` factory. (`3173 <https://github.com/aio-libs/aiohttp/pull/3173>`_)
- The class `AbstractRouteDef` is importable from `aiohttp.web`. (`3183 <https://github.com/aio-libs/aiohttp/pull/3183>`_)


Bugfixes
--------

- Prevent double closing when client connection is released before the
last ``data_received()`` callback. (`3031 <https://github.com/aio-libs/aiohttp/pull/3031>`_)
- Make redirect with `normalize_path_middleware` work when using url encoded paths. (`3051 <https://github.com/aio-libs/aiohttp/pull/3051>`_)
- Postpone web task creation to connection establishment. (`3052 <https://github.com/aio-libs/aiohttp/pull/3052>`_)
- Fix ``sock_read`` timeout. (`3053 <https://github.com/aio-libs/aiohttp/pull/3053>`_)
- When using a server-request body as the `data=` argument of a client request, iterate over the content with `readany` instead of `readline` to avoid `Line too long` errors. (`3054 <https://github.com/aio-libs/aiohttp/pull/3054>`_)
- fix `UrlDispatcher` has no attribute `add_options`, add `web.options` (`3062 <https://github.com/aio-libs/aiohttp/pull/3062>`_)
- correct filename in content-disposition with multipart body (`3064 <https://github.com/aio-libs/aiohttp/pull/3064>`_)
- Many HTTP proxies has buggy keepalive support.
Let's not reuse connection but close it after processing every response. (`3070 <https://github.com/aio-libs/aiohttp/pull/3070>`_)
- raise 413 "Payload Too Large" rather than raising ValueError in request.post()
Add helpful debug message to 413 responses (`3087 <https://github.com/aio-libs/aiohttp/pull/3087>`_)
- Fix `StreamResponse` equality, now that they are `MutableMapping` objects. (`3100 <https://github.com/aio-libs/aiohttp/pull/3100>`_)
- Fix server request objects comparison (`3116 <https://github.com/aio-libs/aiohttp/pull/3116>`_)
- Do not hang on `206 Partial Content` response with `Content-Encoding: gzip` (`3123 <https://github.com/aio-libs/aiohttp/pull/3123>`_)
- Fix timeout precondition checkers (`3145 <https://github.com/aio-libs/aiohttp/pull/3145>`_)


Improved Documentation
----------------------

- Add a new FAQ entry that clarifies that you should not reuse response
objects in middleware functions. (`3020 <https://github.com/aio-libs/aiohttp/pull/3020>`_)
- Add FAQ section "Why is creating a ClientSession outside of an event loop dangerous?" (`3072 <https://github.com/aio-libs/aiohttp/pull/3072>`_)
- Fix link to Rambler (`3115 <https://github.com/aio-libs/aiohttp/pull/3115>`_)
- Fix TCPSite documentation on the Server Reference page. (`3146 <https://github.com/aio-libs/aiohttp/pull/3146>`_)
- Fix documentation build configuration file for Windows. (`3147 <https://github.com/aio-libs/aiohttp/pull/3147>`_)
- Remove no longer existing lingering_timeout parameter of Application.make_handler from documentation. (`3151 <https://github.com/aio-libs/aiohttp/pull/3151>`_)
- Mention that ``app.make_handler`` is deprecated, recommend to use runners
API instead. (`3157 <https://github.com/aio-libs/aiohttp/pull/3157>`_)


Deprecations and Removals
-------------------------

- Drop ``loop.current_task()`` from ``helpers.current_task()`` (`2826 <https://github.com/aio-libs/aiohttp/pull/2826>`_)
- Drop ``reader`` parameter from ``request.multipart()``. (`3090 <https://github.com/aio-libs/aiohttp/pull/3090>`_)

==================

- Many HTTP proxies has buggy keepalive support. Let's not reuse connection but
close it after processing every response. (`3070 <https://github.com/aio-libs/aiohttp/pull/3070>`_)

- Provide vendor source files in tarball (`3076 <https://github.com/aio-libs/aiohttp/pull/3076>`_)

==================

- Fix ``sock_read`` timeout. (`3053 <https://github.com/aio-libs/aiohttp/pull/3053>`_)
- When using a server-request body as the ``data=`` argument of a client request,
iterate over the content with ``readany`` instead of ``readline`` to avoid ``Line
too long`` errors. (`3054 <https://github.com/aio-libs/aiohttp/pull/3054>`_)

==================

Features
--------

- Raise ``ConnectionResetError`` instead of ``CancelledError`` on trying to
write to a closed stream. (`2499 <https://github.com/aio-libs/aiohttp/pull/2499>`_)
- Implement ``ClientTimeout`` class and support socket read timeout. (`2768 <https://github.com/aio-libs/aiohttp/pull/2768>`_)
- Enable logging when ``aiohttp.web`` is used as a program (`2956 <https://github.com/aio-libs/aiohttp/pull/2956>`_)
- Add canonical property to resources (`2968 <https://github.com/aio-libs/aiohttp/pull/2968>`_)
- Forbid reading response BODY after release (`2983 <https://github.com/aio-libs/aiohttp/pull/2983>`_)
- Implement base protocol class to avoid a dependency from internal
``asyncio.streams.FlowControlMixin`` (`2986 <https://github.com/aio-libs/aiohttp/pull/2986>`_)
- Cythonize ``helpers.reify``, 5% boost on macro benchmark (`2995 <https://github.com/aio-libs/aiohttp/pull/2995>`_)
- Optimize HTTP parser (`3015 <https://github.com/aio-libs/aiohttp/pull/3015>`_)
- Implement ``runner.addresses`` property. (`3036 <https://github.com/aio-libs/aiohttp/pull/3036>`_)
- Use ``bytearray`` instead of a list of ``bytes`` in websocket reader. It
improves websocket message reading a little. (`3039 <https://github.com/aio-libs/aiohttp/pull/3039>`_)
- Remove heartbeat on closing connection on keepalive timeout. The used hack
violates HTTP protocol. (`3041 <https://github.com/aio-libs/aiohttp/pull/3041>`_)
- Limit websocket message size on reading to 4 MB by default. (`3045 <https://github.com/aio-libs/aiohttp/pull/3045>`_)


Bugfixes
--------

- Don't reuse a connection with the same URL but different proxy/TLS settings
(`2981 <https://github.com/aio-libs/aiohttp/pull/2981>`_)
- When parsing the Forwarded header, the optional port number is now preserved.
(`3009 <https://github.com/aio-libs/aiohttp/pull/3009>`_)


Improved Documentation
----------------------

- Make Change Log more visible in docs (`3029 <https://github.com/aio-libs/aiohttp/pull/3029>`_)
- Make style and grammar improvements on the FAQ page. (`3030 <https://github.com/aio-libs/aiohttp/pull/3030>`_)
- Document that signal handlers should be async functions since aiohttp 3.0
(`3032 <https://github.com/aio-libs/aiohttp/pull/3032>`_)


Deprecations and Removals
-------------------------

- Deprecate custom application's router. (`3021 <https://github.com/aio-libs/aiohttp/pull/3021>`_)


Misc
----

- 3008, 3011