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## master #14317 +/- ##
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- Coverage 99.12% 98.97% -0.15%
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Files 135 135
Lines 53439 53471 +32
Branches 2723 2723
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- Hits 52969 52923 -46
- Misses 357 434 +77
- Partials 113 114 +1
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llhttp has no end-of-header callback for trailers, so the last trailer stayed pending and was added to the headers of the next message on the connection. A Content-Encoding trailer also applied to the next message. Assisted-by: ClaudeCode:claude-opus-5-5 Signed-off-by: Henry Schreiner <henryfs@princeton.edu>
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 [Medium impact] The PR appears safe to merge; the earlier trailer-read hang is fixed. Reviews (2) · Last reviewed commit: "Send parse errors to the active payload ..." · Reviewed by Greptile |
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Merging this PR will not alter performance1 warning
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feed_data() dropped the payload without an error, so a handler waiting on the body hung and the queued 400 was never sent. Finishing the last trailer in on_message_complete also made a rejected final trailer reach this path. Assisted-by: ClaudeCode:claude-opus-5-5 Signed-off-by: Henry Schreiner <henryfs@princeton.edu>
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What do these changes do?
The C parser (only, Python parser is fine) has no end-of-header callback for trailers, so the last trailer stayed pending and was added to the headers for the next message. A Content-Encoding trailer also applied to the next message. This adds the two missing lines to fix this.
greptile-apps found a bug that I then fixed (second commit). When parsing fails after the body started,
feed_data()drops the payload without an error. A handler waiting on the body hung, and the queued 400 was never sent. This could already happen with a bad chunk size or a bad trailer. The first fix also made it possible with a final trailer overmax_headers, which exposed the bug. The payload now gets the error, matching the Python parser.Are there changes in behavior for the user?
Trailers are not public (yet), so I don't think so.
Is it a substantial burden for the maintainers to support this?
No, just fixes for existing stuff (but not public API).
Related issue number
I was working on #1652, which stated trailer parsing is now added, and invited a pull request for a public API. Adding a public API would enable pelicanfs to request trailers and get better error messages. I ran into two bugs in the non-public trailer handling adding this; this is the first of those two bugs (plus a new bug). Once both are in, I can submit a PR to add the public API.
Checklist
CONTRIBUTORS.txtCHANGES/foldername it
<issue_or_pr_num>.<category>.rstfor example(
14006.contrib.rst)if you don't have an issue number, change it to the pull request
number after creating the PR
ensure category is one of the following:
bugfix: A bug fix for something the maintainers deemed animproper 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 breakingchanges 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 buildprocess.
packaging: Notes for downstreams about unobvious side effectsand 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 abovecategories.
Make sure to use full sentences with correct case and punctuation.
Explain high-level effects affecting the end-users, for example:
Use the past tense or the present tense in a non-imperative mood,
referring to what's changed compared to the last released version
of this project.
I'dd add myself and add a CHANGES entry once I have a PR number.(Done)I added my standard Assisted-by trailer for AI assistance, but if you'd rather have no attribution, I can remove it.
I have two entries for the changelog since there were two bugs, let me know if I should do that differently.
Linting error is pre-existing (username spellcheck).