Fix zstd decompression for chunked zstd response

[ZhaoMJ]

What do these changes do?

The changes fix the decompression of chunked zstd streams.

Are there changes in behavior for the user?

Previously, on chunked zstd streams, aiohttp would crash with zstandard.backend_c.ZstdError: could not determine content size in frame header or zstd.ZstdError: decompression error: did not decompress full frame.
Now it doesn't.

Related issue number

#11604 tries to fix the same issue, but there's no corresponding GitHub issue opened yet.

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_or_pr_num>.<type>.rst (e.g. 588.bugfix.rst)

  • if you don't have an issue number, change it to the pull request
    number after creating the PR

    • .bugfix: A bug fix for something the maintainers deemed an
      improper undesired behavior that got corrected to match
      pre-agreed expectations.
    • .feature: A new behavior, public APIs. That sort of stuff.
    • .deprecation: A declaration of future API removals and breaking
      changes in behavior.
    • .breaking: When something public is removed in a breaking way.
      Could be deprecated in an earlier release.
    • .doc: Notable updates to the documentation structure or build
      process.
    • .packaging: Notes for downstreams about unobvious side effects
      and tooling. Changes in the test invocation considerations and
      runtime assumptions.
    • .contrib: Stuff that affects the contributor experience. e.g.
      Running tests, building the docs, setting up the development
      environment.
    • .misc: Changes that are hard to assign to any of the above
      categories.

  • Make sure to use full sentences with correct case and punctuation,
    for example:

    Fixed issue with non-ascii contents in doctest text files
    -- by :user:`contributor-gh-handle`.

    Use the past tense or the present tense a non-imperative mood,
    referring to what's changed compared to the last released version
    of this project.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.74%. Comparing base (3cf4eba) to head (7238805).
⚠️ Report is 3228 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #11623      +/-   ##
==========================================
+ Coverage   98.19%   98.74%   +0.55%     
==========================================
  Files         128      127       -1     
  Lines       43757    43448     -309     
  Branches     2384     2326      -58     
==========================================
- Hits        42965    42903      -62     
+ Misses        610      389     -221     
+ Partials      182      156      -26     

Flag	Coverage Δ
CI-GHA	98.63% <81.81%> (+0.54%)	⬆️
OS-Linux	98.36% <81.81%> (+0.52%)	⬆️
OS-Windows	96.69% <54.54%> (+1.15%)	⬆️
OS-macOS	97.58% <54.54%> (+0.51%)	⬆️
Py-3.10.11	97.14% <36.36%> (+0.54%)	⬆️
Py-3.10.18	97.64% <36.36%> (+0.53%)	⬆️
Py-3.11.13	97.84% <36.36%> (+0.48%)	⬆️
Py-3.11.9	97.35% <36.36%> (+0.50%)	⬆️
Py-3.12.10	97.45% <36.36%> (+0.51%)	⬆️
Py-3.12.11	97.94% <36.36%> (+0.50%)	⬆️
Py-3.13.7	98.20% <36.36%> (+0.53%)	⬆️
Py-3.14.0	98.16% <36.36%> (+0.51%)	⬆️
Py-3.14.0t	97.22% <36.36%> (+0.50%)	⬆️
Py-pypy3.10.16-7.3.19	83.05% <54.54%> (+0.09%)	⬆️
VM-macos	97.58% <54.54%> (+0.51%)	⬆️
VM-ubuntu	98.36% <81.81%> (+0.52%)	⬆️
VM-windows	96.69% <54.54%> (+1.15%)	⬆️

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[codspeed-hq]

CodSpeed Performance Report

Merging #11623 will not alter performance

_{Comparing ZhaoMJ:master (7238805) with master (4929094)¹}

Summary

✅ 59 untouched

Footnotes

1. No successful run was found on master (7a404ed) during the generation of this report, so 4929094 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[patchback]

Backport to 3.13: 💔 cherry-picking failed — conflicts found

❌ Failed to cleanly apply df8ad83 on top of patchback/backports/3.13/df8ad83efdd33408db2803cbd4a50be45422b74f/pr-11623

Backporting merged PR #11623 into master

1. Ensure you have a local repo clone of your fork. Unless you cloned it
   from the upstream, this would be your origin remote.
2. Make sure you have an upstream repo added as a remote too. In these
   instructions you'll refer to it by the name upstream. If you don't
   have it, here's how you can add it:

   $ git remote add upstream https://github.com/aio-libs/aiohttp.git

3. Ensure you have the latest copy of upstream and prepare a branch
   that will hold the backported code:

   $ git fetch upstream
   $ git checkout -b patchback/backports/3.13/df8ad83efdd33408db2803cbd4a50be45422b74f/pr-11623 upstream/3.13

4. Now, cherry-pick PR Fix zstd decompression for chunked zstd response #11623 contents into that branch:

   $ git cherry-pick -x df8ad83efdd33408db2803cbd4a50be45422b74f

   If it'll yell at you with something like fatal: Commit df8ad83efdd33408db2803cbd4a50be45422b74f is a merge but no -m option was given., add -m 1 as follows instead:

   $ git cherry-pick -m1 -x df8ad83efdd33408db2803cbd4a50be45422b74f

5. At this point, you'll probably encounter some merge conflicts. You must
   resolve them in to preserve the patch from PR Fix zstd decompression for chunked zstd response #11623 as close to the
   original as possible.
6. Push this branch to your fork on GitHub:

   $ git push origin patchback/backports/3.13/df8ad83efdd33408db2803cbd4a50be45422b74f/pr-11623

7. Create a PR, ensure that the CI is green. If it's not — update it so that
   the tests and any other checks pass. This is it!
   Now relax and wait for the maintainers to process your pull request
   when they have some cycles to do reviews. Don't worry — they'll tell you if
   any improvements are necessary when the time comes!

🤖 @patchback
I'm built with octomachinery and
my source is open — https://github.com/sanitizers/patchback-github-app.

[patchback]

Backport to 3.14: 💔 cherry-picking failed — conflicts found

❌ Failed to cleanly apply df8ad83 on top of patchback/backports/3.14/df8ad83efdd33408db2803cbd4a50be45422b74f/pr-11623

Backporting merged PR #11623 into master

1. Ensure you have a local repo clone of your fork. Unless you cloned it
   from the upstream, this would be your origin remote.
2. Make sure you have an upstream repo added as a remote too. In these
   instructions you'll refer to it by the name upstream. If you don't
   have it, here's how you can add it:

   $ git remote add upstream https://github.com/aio-libs/aiohttp.git

3. Ensure you have the latest copy of upstream and prepare a branch
   that will hold the backported code:

   $ git fetch upstream
   $ git checkout -b patchback/backports/3.14/df8ad83efdd33408db2803cbd4a50be45422b74f/pr-11623 upstream/3.14

4. Now, cherry-pick PR Fix zstd decompression for chunked zstd response #11623 contents into that branch:

   $ git cherry-pick -x df8ad83efdd33408db2803cbd4a50be45422b74f

   If it'll yell at you with something like fatal: Commit df8ad83efdd33408db2803cbd4a50be45422b74f is a merge but no -m option was given., add -m 1 as follows instead:

   $ git cherry-pick -m1 -x df8ad83efdd33408db2803cbd4a50be45422b74f

5. At this point, you'll probably encounter some merge conflicts. You must
   resolve them in to preserve the patch from PR Fix zstd decompression for chunked zstd response #11623 as close to the
   original as possible.
6. Push this branch to your fork on GitHub:

   $ git push origin patchback/backports/3.14/df8ad83efdd33408db2803cbd4a50be45422b74f/pr-11623

7. Create a PR, ensure that the CI is green. If it's not — update it so that
   the tests and any other checks pass. This is it!
   Now relax and wait for the maintainers to process your pull request
   when they have some cycles to do reviews. Don't worry — they'll tell you if
   any improvements are necessary when the time comes!

🤖 @patchback
I'm built with octomachinery and
my source is open — https://github.com/sanitizers/patchback-github-app.

[Dreamsorcerer]

Think you could handle those backports?

[ZhaoMJ]

@Dreamsorcerer backports:
#11625
#11624