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[PR #8012/5f699bbb backport][3.9] Fix FileResponse doing blocking I/O in the event loop #8015

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@patchback patchback bot commented Jan 10, 2024

This is a backport of PR #8012 as merged into master (5f699bb).

What do these changes do?

Fix FileResponse doing blocking I/O in the event loop

The call to os.stat was run in the executor but the call to is_file() was not. Additionally this resulted in two syscalls to stat since both is_file and stat will call stat under the hood. The code has been refactored to ensure there is only one stat syscall and it happens in the executor

Are there changes in behavior for the user?

No

Related issue number

discovered while investigating #8011 but not does fix the issue reported

Checklist

  • I think the code is well written
  • Unit tests for the changes exist
  • Documentation reflects the changes
  • If you provide code modification, please add yourself to CONTRIBUTORS.txt
    • The format is <Name> <Surname>.
    • Please keep alphabetical order, the file is sorted by names.
  • Add a new news fragment into the CHANGES folder
    • name it <issue_id>.<type> for example (588.bugfix)
    • if you don't have an issue_id change it to the pr id after creating the pr
    • ensure type is one of the following:
      • .feature: Signifying a new feature.
      • .bugfix: Signifying a bug fix.
      • .doc: Signifying a documentation improvement.
      • .removal: Signifying a deprecation or removal of public API.
      • .misc: A ticket has been closed, but it is not of interest to users.
    • Make sure to use full sentences with correct case and punctuation, for example: "Fix issue with non-ascii contents in doctest text files."

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codecov bot commented Jan 10, 2024

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (46f6a90) 97.38% compared to head (abbe2d8) 97.38%.

Additional details and impacted files
@@           Coverage Diff           @@
##              3.9    #8015   +/-   ##
=======================================
  Coverage   97.38%   97.38%           
=======================================
  Files         108      108           
  Lines       32471    32474    +3     
  Branches     3846     3845    -1     
=======================================
+ Hits        31623    31626    +3     
  Misses        646      646           
  Partials      202      202           
Flag Coverage Δ
CI-GHA 97.29% <100.00%> (+<0.01%) ⬆️
OS-Linux 96.99% <100.00%> (+<0.01%) ⬆️
OS-Windows 94.47% <100.00%> (-0.01%) ⬇️
OS-macOS 96.80% <100.00%> (+<0.01%) ⬆️
Py-3.10.11 94.37% <100.00%> (+<0.01%) ⬆️
Py-3.10.13 96.76% <100.00%> (-0.01%) ⬇️
Py-3.11.6 ?
Py-3.11.7 96.49% <100.00%> (+<0.01%) ⬆️
Py-3.12.0 ?
Py-3.12.1 96.58% <100.00%> (+0.03%) ⬆️
Py-3.8.10 94.35% <100.00%> (-0.01%) ⬇️
Py-3.8.18 96.70% <100.00%> (+<0.01%) ⬆️
Py-3.9.13 94.36% <100.00%> (+<0.01%) ⬆️
Py-3.9.18 96.75% <100.00%> (+<0.01%) ⬆️
Py-pypy7.3.13 ?
Py-pypy7.3.14 96.29% <100.00%> (?)
VM-macos 96.80% <100.00%> (+<0.01%) ⬆️
VM-ubuntu 96.99% <100.00%> (+<0.01%) ⬆️
VM-windows 94.47% <100.00%> (-0.01%) ⬇️

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@bdraco bdraco merged commit fca5a7a into 3.9 Jan 11, 2024
28 of 30 checks passed
@bdraco bdraco deleted the patchback/backports/3.9/5f699bbbf98d3700921ec9a7d646d5f21e82e8c1/pr-8012 branch January 11, 2024 00:56
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