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fix: keep numeric header names in filterHeaders() - #35
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ChangesHeader key normalization
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🟡 Moderate · up to The change is intended to preserve valid numeric-only header names, but the current implementation and test may still allow PHP to convert those names back to integer keys, leaving the preservation behavior unverified and potentially altering or dropping valid headers. Merge should wait for the representation or assertion to be corrected. Pre-merge checks |
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Docstring coverage is 33.33% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 2 files. | Write docstrings for the functions missing them to satisfy the coverage threshold. |
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The title clearly and concisely describes the main change: preserving numeric header names in filterHeaders(). |
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Actionable comments posted: 1
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Inline comments:
In `@src/HttpWorker.php`:
- Around line 232-239: Align the headers boundary and test with PHP’s array-key
semantics: in src/HttpWorker.php lines 232-239, either use a representation that
preserves actual string keys or revise the HeadersList documentation to describe
PHP’s runtime key coercion; in tests/Unit/HttpWorkerTest.php lines 52-65, assert
only representable semantic preservation or use a key-value representation that
can verify string-key preservation.
Apply the same fix in `@tests/Unit/HttpWorkerTest.php` around lines 52 - 65: The
expected array key is also subject to PHP's numeric-key coercion and cannot
detect string-key loss.
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src/HttpWorker.phptests/Unit/HttpWorkerTest.php
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A header name made up entirely of digits (e.g. "111") is a valid RFC 9110 token, but PHP itself coerces a canonical-integer string used as an array key into an int before filterHeaders() ever sees it. !\is_string($key) then treats that coerced int key as invalid input and deletes the header outright, silently dropping real data instead of the malformed input the check exists to guard against. Casts the key back to a string instead, which recovers the original header name losslessly (PHP guarantees (string) (int) $s === $s for exactly the strings it coerces this way). An empty string is still rejected, unchanged - that is the actual malformed case this method guards against. The existing test data for this method encoded the bug as the expected, correct behavior (a numeric-keyed header labelled "invalid-non-string-key" and asserted dropped); updated it to assert the header is recovered instead.
…lState filterHeaders() now keeps purely-numeric header names instead of dropping them, but PHP always coerces such names into int array keys, so HeadersList can never guarantee string keys. PSR7Worker::mapRequest() and GlobalState::enrichServerVars() consumed those keys as strings under strict_types, so a numeric header name would throw a TypeError instead of being silently dropped as before. Cast the key to string at both consumption points, and correct the HeadersList type/docblocks that incorrectly implied string keys were guaranteed. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
test: cover numeric header names in GlobalState The rebuild loop re-coerced the cast key back to int, so unsetting the empty key is equivalent. HeadersList narrows to int|non-empty-string instead of array-key, keeping the non-empty guarantee for string names. Assisted-By: Claude Opus 5.5 <noreply@anthropic.com>
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Thanks for the fix, @aln-1, and for the clear write-up. The bug is real and still present on 4.x: both the JSON and the protobuf paths decode a header like 111 into an int array key, and filterHeaders() silently dropped it. Your follow-up commit also caught the part that is easy to miss: once such a header survives, PSR7Worker::mapRequest() and GlobalState::enrichServerVars() would hit a TypeError under strict_types, so the casts there are needed.
Since 4.x moved on a lot (Testo instead of PHPUnit, PHP 8.2+, spiral/code-style), I pushed a few maintainer changes on top of your branch; your two commits keep their authorship:
- Rebased onto current
4.x. The data-provider changes inHttpWorkerTest/PSR7WorkerTestcarried over to the Testo suite as is. filterHeaders()reduced tounset($headers['']). Rebuilding the array with(string) $keydidn't change anything: PHP coerces the key back to int on insertion, and''is the only key the loop could drop. The behavior is the same, without the copy.HeadersListisarray<int|non-empty-string, ...>instead ofarray<array-key, ...>. Int keys are now allowed, and string keys are still guaranteed to be non-empty.- Shorter comments. The long explanations in the docblocks and tests are now one line each, stating the constraint: an int key is a numeric header name, and strict types reject it in
withHeader()/str_replace(). That matches the comment style in the rest of the codebase. Thegit.iolink is replaced by the reason it stood for. - One more test case in
GlobalStateTestthat covers a numeric header inenrichServerVars()directly. - Retitled the PR in conventional-commit form for release-please.
On CodeRabbit's thread: it was right that a plain PHP array can't hold "111" as a string key. The answer here is to accept int keys in the type and cast at the two places that use the key, which is what the branch does now.
One note for users, not a blocker: code that iterates Request::$headers and assumes string keys (e.g. strtolower($name) under strict_types) can now see an int key for such headers. Before this change those headers were dropped, so nothing that worked before breaks. Static analysis may start reporting it, though, because the documented type is wider now.
roxblnfk
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A header name made up entirely of digits (e.g.
"111") is a valid RFC 9110 token, but PHP itself coerces a canonical-integer string used as an array key into anintbeforefilterHeaders()ever sees it.!\is_string($key)then treats that coerced int key as invalid input and deletes the header outright — silently dropping real data instead of the malformed input the check exists to guard against (@see: <https://git.io/JzjgJ>, which is about handing a non-string/empty header name to PSR-7'swithHeader(), not about numeric ones).The fix
Casts the key back to a string instead of deleting it, which recovers the original header name losslessly — PHP guarantees
(string) (int) $s === $sfor exactly the strings it coerces this way. An empty string is still rejected, unchanged: that's the actual malformed case this method exists to guard against.Tests
The existing test data for this method encoded the bug as the expected, correct behavior — a numeric-keyed header (
111 => [...]) was labeledinvalid-non-string-keyand asserted dropped. Updated it to assert the header is recovered as'111' => [...]instead.Verified locally: full suite passes (42 tests), Psalm clean,
php-cs-fixer --dry-runreports 0 files needing changes.Found while building a RoadRunner runtime adapter for another framework, where a conformance test asserting header round-tripping caught this against a real
rrbinary.Summary by CodeRabbit
Bug Fixes
Tests