https://github.com/python/cpython/commit/9a43485830d20f5104951f5288f4bdf3912067d8
commit: 9a43485830d20f5104951f5288f4bdf3912067d8
branch: 3.13
author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com>
committer: kumaraditya303 <kumaradi...@python.org>
date: 2025-03-17T19:46:30Z
summary:
[3.13] gh-131325: fix sendfile fallback implementation to drain data after
writing to transport (GH-131376) (#131377)
gh-131325: fix sendfile fallback implementation to drain data after writing to
transport (GH-131376)
(cherry picked from commit 94f4d87aeb4d2d7bddcb4c3aad4f62a727ac91ee)
Co-authored-by: Kumar Aditya <kumaradi...@python.org>
files:
A Misc/NEWS.d/next/Library/2025-03-17-18-50-39.gh-issue-131325.wlasMF.rst
M Lib/asyncio/base_events.py
diff --git a/Lib/asyncio/base_events.py b/Lib/asyncio/base_events.py
index e19a364886ab5f..d6f98370fd23e1 100644
--- a/Lib/asyncio/base_events.py
+++ b/Lib/asyncio/base_events.py
@@ -1292,8 +1292,8 @@ async def _sendfile_fallback(self, transp, file, offset,
count):
read = await self.run_in_executor(None, file.readinto, view)
if not read:
return total_sent # EOF
- await proto.drain()
transp.write(view[:read])
+ await proto.drain()
total_sent += read
finally:
if total_sent > 0 and hasattr(file, 'seek'):
diff --git
a/Misc/NEWS.d/next/Library/2025-03-17-18-50-39.gh-issue-131325.wlasMF.rst
b/Misc/NEWS.d/next/Library/2025-03-17-18-50-39.gh-issue-131325.wlasMF.rst
new file mode 100644
index 00000000000000..6c1f64eee6ad02
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-03-17-18-50-39.gh-issue-131325.wlasMF.rst
@@ -0,0 +1 @@
+Fix sendfile fallback implementation to drain data after writing to transport
in :mod:`asyncio`.
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