- update to 3.9.5:
* Fixed "Unclosed client session" when initialization of
:py:class:`~aiohttp.ClientSession` fails
* Fixed regression (from :pr:`8280`) with adding Content-
Disposition to the form-data part after appending to writer
* Added default Content-Disposition in multipart/form-data
responses to avoid broken form-data responses
* The asynchronous internals now set the underlying causes when
assigning exceptions to the future objects
* Treated values of Accept-Encoding header as case-insensitive
when checking for gzip files
* Improved the DNS resolution performance on cache hit
* Changed the type annotations to allow dict on
:meth:`aiohttp.MultipartWriter.append`,
:meth:`aiohttp.MultipartWriter.append_json` and
:meth:`aiohttp.MultipartWriter.append_form` -- by
:user:`cakemanny` Related issues and pull requests on GitHub:
:issue:`7741`.
* Ensure websocket transport is closed when client does not
close it
* Leave websocket transport open if receive times out or is
cancelled
* Fixed content not being read when an upgrade request was not
supported with the pure Python implementation.
* Fixed a race condition with incoming connections during
server shutdown
* Fixed multipart/form-data compliance with RFC 7578
* Fixed blocking I/O in the event loop while processing files
in a POST request
* Escaped filenames in static view