Fix the tracing module's type hints #4912
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`_SignalArgs` is (was) a supertype of its arguments and with `Callable ` being _contravariant_ in its arguments, the only way this would've passed a type check is if the callback were to (purport to) accept every single one of the parameter types in a union, exactly as specified - or `object`. Either way, the parameter types were not associated with their corresponding signals so it would have been possible to append a callback with a `TraceDnsCacheMissParams` parameter to an `on_request_start` signal.
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## master #4912 +/- ##
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+ Coverage 97.58% 97.60% +0.02%
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Files 43 43
Lines 8932 8931 -1
Branches 1406 1406
==========================================
+ Hits 8716 8717 +1
+ Misses 96 95 -1
+ Partials 120 119 -1
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This fixes py-yarl in pkgsrc being too new for py-aiohttp. 3.7.0 (2020-10-24) ================== 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>`_
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What do these changes do?
_SignalArgsis (was) a supertype of itsarguments and with
Callablebeing contravariantin its arguments, the only way this would've
passed a type check is if the callback were to
(purport to) accept every single one of the
parameter types in a union,
exactly as specified - or
object.Either way, the parameter types were not
associated with their corresponding signals
so it would have been possible to append
a callback with a
TraceDnsCacheMissParamsparameter to an
on_request_startsignal.Are there changes in behavior for the user?
No.
Related issue number
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Checklist
CONTRIBUTORS.txtCHANGESfolder<issue_id>.<type>for example (588.bugfix)issue_idchange it to the pr id after creating the pr.feature: Signifying a new feature..bugfix: Signifying a bug fix..doc: Signifying a documentation improvement..removal: Signifying a deprecation or removal of public API..misc: A ticket has been closed, but it is not of interest to users.