v2.27.0

[nateprewitt]

2.27.0 (2022-01-03)

Improvements

• Officially added support for Python 3.10. (Add support for 3.10 #5928)

• Added a requests.exceptions.JSONDecodeError to unify JSON exceptions between
  Python 2 and 3. This gets raised in the response.json() method, and is
  backwards compatible as it inherits from previously thrown exceptions.
  Can be caught from requests.exceptions.RequestException as well. (Fix inconsistent exception type in response.json() method #5856)

• Improved error text for misnamed InvalidSchema and MissingSchema
  exceptions. This is a temporary fix until exceptions can be renamed
  (Schema->Scheme). (Fix erroneous use of 'schema' instead of 'scheme' #6017)

• Improved proxy parsing for proxy URLs missing a scheme. This will address
  recent changes to urlparse in Python 3.9+. (Move from urlparse to parse_url for prepending schemes #5917)

Bugfixes

• Fixed defect in extract_zipped_paths which could result in an infinite loop
  for some paths. (Fix extract_zipped_paths infinite loop when provided invalid unc path #5851)

• Fixed handling for AttributeError when calculating length of files obtained
  by Tarfile.extractfile(). (Catch AttributeError in utils.super_len #5239)

• Fixed urllib3 exception leak, wrapping urllib3.exceptions.InvalidHeader with
  requests.exceptions.InvalidHeader. (Appropriately handle urllib3's InvalidHeader exception #5914)

• Fixed bug where two Host headers were sent for chunked requests. (Send only one Host header in chunked request #5391)

• Fixed regression in Requests 2.26.0 where Proxy-Authorization was
  incorrectly stripped from all requests sent with Session.send. (Refactor rebuild_proxies to separate resolution and auth handling #5924)

• Fixed performance regression in 2.26.0 for hosts with a large number of
  proxies available in the environment. (Refactor rebuild_proxies to separate resolution and auth handling #5924)

• Fixed idna exception leak, wrapping UnicodeError with
  requests.exceptions.InvalidURL for URLs with a leading dot (.) in the
  domain. (Raise InvalidUrl if host starts with '.' character. #5414)

Deprecations

• Requests support for Python 2.7 and 3.6 will be ending in 2022. While we
  don't have exact dates, Requests 2.27.x is likely to be the last release
  series providing support.

[nateprewitt]

Currently pending #5894 and #5917.

[nateprewitt]

Alright, things should be finalized for release notes. I'll move it out of draft for approval but let's wait to merge. I'll do that with the release and tagging process.