aiohttp 3.10.11rc0

on Python PyPI

Bug fixes

• Authentication provided by a redirect now takes precedence over provided auth when making requests with the client -- by :user:PLPeeters.

  Related issues and pull requests on GitHub:
  #9436.

• Fixed :py:meth:WebSocketResponse.close() <aiohttp.web.WebSocketResponse.close> to discard non-close messages within its timeout window after sending close -- by :user:lenard-mosys.

  Related issues and pull requests on GitHub:
  #9506.

• Fixed a deadlock that could occur while attempting to get a new connection slot after a timeout -- by :user:bdraco.

  The connector was not cancellation-safe.

  Related issues and pull requests on GitHub:
  #9670, #9671.

• Fixed the WebSocket flow control calculation undercounting with multi-byte data -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #9686.

Removals and backward incompatible breaking changes

• Improved performance of the connector when a connection can be reused -- by :user:bdraco.

  If BaseConnector.connect has been subclassed and replaced with custom logic, the ceil_timeout must be added.

  Related issues and pull requests on GitHub:
  #9600.

Miscellaneous internal changes

• Improved performance of the client request lifecycle when there are no cookies -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #9470.

• Improved performance of sending client requests when the writer can finish synchronously -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #9485.

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

  Related issues and pull requests on GitHub:
  #9603.

• Passing enable_cleanup_closed to :py:class:aiohttp.TCPConnector is now ignored on Python 3.12.7+ and 3.13.1+ since the underlying bug that caused asyncio to leak SSL connections has been fixed upstream -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #9726, #9736.