3.11.15

Bug fixes

• Reverted explicitly closing sockets if an exception is raised during create_connection -- by :user:bdraco.

  This change originally appeared in aiohttp 3.11.13

  Related issues and pull requests on GitHub:
  #10464, #10617, #10656.

Miscellaneous internal changes

• Improved performance of WebSocket buffer handling -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10601.

• Improved performance of serializing headers -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10625.

---

3.11.14

Bug fixes

• Fixed an issue where dns queries were delayed indefinitely when an exception occurred in a trace.send_dns_cache_miss
  -- by :user:logioniz.

  Related issues and pull requests on GitHub:
  #10529.

• Fixed DNS resolution on platforms that don't support socket.AI_ADDRCONFIG -- by :user:maxbachmann.

  Related issues and pull requests on GitHub:
  #10542.

• The connector now raises :exc:aiohttp.ClientConnectionError instead of :exc:OSError when failing to explicitly close the socket after :py:meth:asyncio.loop.create_connection fails -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10551.

• Break cyclic references at connection close when there was a traceback -- by :user:bdraco.

  Special thanks to :user:availov for reporting the issue.

  Related issues and pull requests on GitHub:
  #10556.

• Break cyclic references when there is an exception handling a request -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10569.

Features

• Improved logging on non-overlapping WebSocket client protocols to include the remote address -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10564.

Miscellaneous internal changes

• Improved performance of parsing content types by adding a cache in the same manner currently done with mime types -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10552.

---

3.11.13

Bug fixes

• Removed a break statement inside the finally block in :py:class:~aiohttp.web.RequestHandler
  -- by :user:Cycloctane.

  Related issues and pull requests on GitHub:
  #10434.

• Changed connection creation to explicitly close sockets if an exception is raised in the event loop's create_connection method -- by :user:top-oai.

  Related issues and pull requests on GitHub:
  #10464.

Packaging updates and notes for downstreams

• Fixed test test_write_large_payload_deflate_compression_data_in_eof_writelines failing with Python 3.12.9+ or 3.13.2+ -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10423.

Miscellaneous internal changes

• Added human-readable error messages to the exceptions for WebSocket disconnects due to PONG not being received -- by :user:bdraco.

  Previously, the error messages were empty strings, which made it hard to determine what went wrong.

  Related issues and pull requests on GitHub:
  #10422.

---

3.11.12

Bug fixes

• MultipartForm.decode() now follows RFC1341 7.2.1 with a CRLF after the boundary
  -- by :user:imnotjames.

  Related issues and pull requests on GitHub:
  #10270.

• Restored the missing total_bytes attribute to EmptyStreamReader -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10387.

Features

• Updated :py:func:~aiohttp.request to make it accept _RequestOptions kwargs.
  -- by :user:Cycloctane.

  Related issues and pull requests on GitHub:
  #10300.

• Improved logging of HTTP protocol errors to include the remote address -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10332.

Improved documentation

• Added aiohttp-openmetrics to list of third-party libraries -- by :user:jelmer.

  Related issues and pull requests on GitHub:
  #10304.

Packaging updates and notes for downstreams

• Added missing files to the source distribution to fix Makefile targets.
  Added a cythonize-nodeps target to run Cython without invoking pip to install dependencies.

  Related issues and pull requests on GitHub:
  #10366.

• Started building armv7l musllinux wheels -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10404.

Contributor-facing changes

• The CI/CD workflow has been updated to use upload-artifact v4 and download-artifact v4 GitHub Actions -- by :user:silamon.

  Related issues and pull requests on GitHub:
  #10281.

Miscellaneous internal changes

• Restored support for zero copy writes when using Python 3.12 versions 3.12.9 and later or Python 3.13.2+ -- by :user:bdraco.

  Zero copy writes were previously disabled due to :cve:2024-12254 which is resolved in these Python versions.

  Related issues and pull requests on GitHub:
  #10137.

---

3.11.11

Bug fixes

• Updated :py:meth:~aiohttp.ClientSession.request to reuse the quote_cookie setting from ClientSession._cookie_jar when processing cookies parameter.
  -- by :user:Cycloctane.

  Related issues and pull requests on GitHub:
  #10093.

• Fixed type of SSLContext for some static type checkers (e.g. pyright).

  Related issues and pull requests on GitHub:
  #10099.

• Updated :meth:aiohttp.web.StreamResponse.write annotation to also allow :class:bytearray and :class:memoryview as inputs -- by :user:cdce8p.

  Related issues and pull requests on GitHub:
  #10154.

• Fixed a hang where a connection previously used for a streaming
  download could be returned to the pool in a paused state.
  -- by :user:javitonino.

  Related issues and pull requests on GitHub:
  #10169.

Features

• Enabled ALPN on default SSL contexts. This improves compatibility with some
  proxies which don't work without this extension.
  -- by :user:Cycloctane.

  Related issues and pull requests on GitHub:
  #10156.

Miscellaneous internal changes

• Fixed an infinite loop that can occur when using aiohttp in combination
  with async-solipsism_ -- by :user:bmerry.

  .. _async-solipsism: https://github.com/bmerry/async-solipsism

  Related issues and pull requests on GitHub:
  #10149.

---

3.11.10

Bug fixes

• Fixed race condition in :class:aiohttp.web.FileResponse that could have resulted in an incorrect response if the file was replaced on the file system during prepare -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10101, #10113.

• Replaced deprecated call to :func:mimetypes.guess_type with :func:mimetypes.guess_file_type when using Python 3.13+ -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10102.

• Disabled zero copy writes in the StreamWriter -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10125.

---

3.11.9

Bug fixes

• Fixed invalid method logging unexpected being logged at exception level on subsequent connections -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10055, #10076.

Miscellaneous internal changes

• Improved performance of parsing headers when using the C parser -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10073.

---

3.11.8

Miscellaneous internal changes

• Improved performance of creating :class:aiohttp.ClientResponse objects when there are no cookies -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10029.

• Improved performance of creating :class:aiohttp.ClientResponse objects -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10030.

• Improved performances of creating objects during the HTTP request lifecycle -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10037.

• Improved performance of constructing :class:aiohttp.web.Response with headers -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10043.

• Improved performance of making requests when there are no auto headers to skip -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10049.

• Downgraded logging of invalid HTTP method exceptions on the first request to debug level -- by :user:bdraco.

  HTTP requests starting with an invalid method are relatively common, especially when connected to the public internet, because browsers or other clients may try to speak SSL to a plain-text server or vice-versa. These exceptions can quickly fill the log with noise when nothing is wrong.

  Related issues and pull requests on GitHub:
  #10055.

---

3.11.7

Bug fixes

• Fixed the HTTP client not considering the connector's force_close value when setting the Connection header -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10003.

Miscellaneous internal changes

• Improved performance of serializing HTTP headers -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #10014.

---

3.11.6

Bug fixes

• Restored the force_close method to the ResponseHandler -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #9997.

---