Miss Islington (bot) 9fb25cbd41 [3.15] gh-47005: fix do_open() to let regular headers override unredirected … (GH-146506) (#153377) ...

gh-47005: fix do_open() to let regular headers override unredirected … (GH-146506)

AbstractHTTPHandler.do_open() was building the request header dict by
starting with unredirected_hdrs and only inserting regular headers that
were not already present, giving unredirected headers priority.  This
contradicts get_header() and header_items(), both of which give regular
headers the higher priority.

Fix by unconditionally updating with req.headers so that a header set
via add_header() always overrides one set via add_unredirected_header().

---------
(cherry picked from commit 6d386684ad)

Co-authored-by: CHINMAY <89741289+Das-Chinmay@users.noreply.github.com>
Co-authored-by: Senthil Kumaran <senthil@python.org>

2026-07-09 04:15:30 +00:00

..

__init__.py

…

error.py

Improve the comment in URLError (#139874)

2025-10-14 12:31:21 -07:00

parse.py

[3.15] gh-105708: 'V' could be case insensitive for IPvFuture hostnames (GH-105709) (#153138)

2026-07-05 10:52:46 -07:00

request.py

[3.15] gh-47005: fix do_open() to let regular headers override unredirected … (GH-146506) (#153377)

2026-07-09 04:15:30 +00:00

response.py

…

robotparser.py

[3.15] gh-79638: Restore "Treat an unreachable robots.txt as disallow all" (GH-152525) (GH-153107)

2026-07-05 11:44:44 +00:00