fix(google): validate candidate, content and part containers (#2231) - #2232
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Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review. 📝 WalkthroughWalkthroughThe Google adapter now validates candidate, content, and parts containers during streaming and buffered parsing. Malformed structures produce descriptive terminal errors. Absent, null, and empty valid cases remain supported. Tests and documentation cover the behavior. ChangesGoogle response hardening
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to The PR adds localized validation for malformed Google response containers and aligns null-candidate handling across parsing paths; no actionable merge-blocking risk remains, so it is merge-ready after normal checks and review. Suggested reviewers: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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Actionable comments posted: 3
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Inline comments:
In `@docs-site/src/content/docs/reference/adapters.md`:
- Around line 119-124: Correct the Google adapter documentation so absent, null,
or empty candidates are not described as normal completion: buffered parsing
reports “google response contained no candidates,” while streaming skips such
candidates and ultimately requires a terminal signal, with null rejected as an
invalid container. Apply equivalent guidance to each localized Google adapter
section.
In `@src/adapters/google.ts`:
- Around line 375-379: Extend InvalidGoogleShapeDiagnostic with
candidates_not_array and candidate_not_object reasons, retaining valueType for
both. In the streaming and buffered candidate parsing paths, replace generic
invalid-candidates handling with invalidGoogleShapeEvent carrying the specific
structural reason and offending value type, and update candidate regression
expectations accordingly.
- Around line 1005-1012: Update parseStream to treat candidates: null the same
as an absent or empty candidate list, rather than returning the
invalid-candidates error; continue processing until a later terminal frame. Add
a streaming regression case covering a null-candidates frame followed by a
finish-only candidate frame, while preserving existing handling for absent,
empty candidates, content, and parts.
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docs-site/src/content/docs/reference/adapters.mdsrc/adapters/google.tstests/google-hardening.test.ts
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lidge-jun#1332 made a malformed nested candidate terminal on the streaming path, on the rule that a claimed response is not padding. Three containers in the same adapter never got that rule, and each fails a different way. `content.parts` is read straight into a `for...of` in both parsers, so a container that is not an array of objects escapes as a raw `TypeError` — `{} is not iterable`, or `null is not an object` on `part.thoughtSignature`. The buffered `parseResponse` call site in `src/server/responses/core.ts` wraps the call in try/finally with no catch, so the exception leaves the turn unstructured. A `parts: "txt"` is worse than a crash: a string is iterable, so it is consumed character by character and the turn completes empty. `candidate.content` was never inspected at all. `content?.parts` reads `undefined` from any non-record, so a candidate shaped `content: [{ parts: [...] }]` — a plausible shape from anything that mirrors the request's repeated `contents` — dropped its own text and reported success. The buffered parser also never checked `candidates[0]`. `[null]`, `[5]` and `["x"]` all reached a bare `done`, reporting a claimed-but-malformed candidate to the caller as a successful empty turn — the opposite of what the same adapter does when streaming. A non-array `candidates` was not checked either: `"abc"` passed the emptiness check because its `length` is 3, and `{}`/`5` were reported as an absent candidate list rather than a malformed one. All three now terminate through the existing adapter error channel, carrying the structural reason, the part index and the offending value's type — never its contents. The two candidate errors lidge-jun#1332 already emitted get the same treatment, so one diagnostic type covers every rung; the wording lidge-jun#1332 chose is kept as the message prefix, so an existing log grep still matches. Going the other way, the streaming parser was treating a `null` `candidates` container as corruption and terminating on it. That is the lidge-jun#1219 failure mode one rung in: a `{"candidates":null}` frame between a content delta and the finish chunk killed a turn whose answer had already fully arrived, while the same stream with the key absent or the array empty completed. `null` now joins absence, as it already does on the buffered side. Absence stays legal, including the encodings of it that are not records: an absent, `null` or empty `parts`; an absent, `null` or empty-array `content` (`[]` is how a JSON writer with no distinct empty-object form spells an empty object, and it already means "no parts"); and an absent, `null` or empty `candidates` — while a non-null, non-array `candidates` stays terminal.
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리뷰 · 우선순위 65 / 80구멍은 구글 어댑터 네스티드 컨테이너임. 지금 호출 쪽이 더 나쁨. 비스트림 이 PR이 그 세 단을 같은 규칙으로 맞춤. 방향 하나 더. 스트림 테스트가 주의. 안쪽 필드 타이핑은 안 넣음. CCA 언랩 이후라 Direct/Vertex/Antigravity 세 모드가 같이 먹음. #2188 사이드카, #2190 해결방안: CI 그린이면 이 댓글은 grok-bot이 작성했습니다 |
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Reviewed exact head 4dd570b. The Google adapter now rejects malformed candidate/content/parts containers through structured diagnostics, preserves valid null streaming keepalive frames, and retains fail-closed terminal behavior. Focused validation and exact-head Cross-platform CI plus React Doctor are green; all review threads are resolved. Approved for dev.
3 participants
Closes #2231
Problem
#1332 settled the rule for this file: a malformed nested payload inside a well-formed frame is a
claimed response, not padding, so it fails closed through the adapter's structured error channel
instead of being iterated or silently dropped. That rule reached the streaming Google candidate
and OpenAI Chat's tool calls on both paths. Three containers in
src/adapters/google.tswere leftone rung below it, and each fails a different way. A fourth case, found during review, fails in the
opposite direction — it terminates on something that is not corruption at all.
Reproduced on
dev@03735ecaby driving the adapter with a syntheticResponse; the probe and itsfull output are in #2231.
candidates[0].content.partsis{}TypeError: {} is not iterablepartsis[null]TypeError: null is not an object (evaluating 'part.thoughtSignature')partsis5TypeError: number is not iterablepartsis"txt"partsis[5]partsshapescandidatesis[null][done]— streaming returnsinvalid candidatesfor the same inputcandidatesis[5][done]candidatesis"abc"[done]—"abc".lengthis 3, so the emptiness check passes andcandidates[0]is the character"a"contentis[{ parts: [{ text: "lost" }] }][done]— a complete answer arrives and is discardedcontentis"txt"[done]candidatesisnull, between a content delta and the finish chunk[text(PONG), error(invalid candidates)]— the answer had already fully arrived and the turn failed anywayA–C and F–H throw out of the adapter. The buffered call site in
src/server/responses/core.tswraps
parseResponseintry { … } finallywith nocatch, so theTypeErrorleaves the turnunstructured instead of becoming an adapter error event.
D, E, I–O are the quieter half — the turn is reported as a successful, empty completion. N is
the one that loses real output:
content?.partsreadsundefinedfrom any non-record, so acandidate that mirrors the request's repeated
contentsshape drops its own text and still reportssuccess.
P is the #1219 shape one rung in, and it points the other way from all the rest. On clean
dev:nullwas being read as corruption when it is an absence encoding, so a padding-shaped frame killeda turn whose answer had already landed — the outcome the #1219 reporter measured, at a different
rung. It surfaced from a CodeRabbit finding on this PR and was confirmed against clean
devbeforebeing acted on.
Correcting my own earlier report. #1325 listed the buffered Google path as "checked and clean —
needs no change", because it returns a normal
donefor{"candidates":[null]}rather thanthrowing. That was true about the throw and wrong about the conclusion: it returns a normal
donebecause it silently drops the candidate, which is precisely the outcome #1332's rationale names.
Fix
candidate.content.partsis validated before it is iterated — streaming and buffered. Apresent, non-null
partsmust be an array whose every element is a non-null, non-array object.candidate.contentis validated at all — it previously was not. It must be absent,null, arecord, or an empty array. The empty-array carve-out is deliberate:
[]is how a JSON writer withno distinct empty-object form spells an empty
content, and it already behaves as "no parts". Anon-empty array is the opposite case, and is where case N was losing output.
The buffered parser gets #1332's candidate guard —
json.candidatespresent, non-null and notan array, and
candidates[0]not a record, both now fail closed exactly as the streaming parser hassince #1332, instead of returning a bare
doneor a misleadingno candidates.The streaming parser stops terminating on a
nullcandidates container (case P).nulljoinsabsent and empty, which is what the buffered path already did. A non-null, non-array container stays
terminal. A stream made only of such frames still ends on
upstream stream ended without a terminal signal — possible truncation, so skipping them cannotmanufacture a successful empty turn.
One diagnostic type covers every rung. All seven sites — two candidate, one content, two parts,
across both parsers — go through
invalidGoogleShapeEvent, which reports the structural reason, thefailing
partIndexwhere there is one, and the offending value's type — never its contents:The two candidate messages #1332 introduced keep their exact wording as the message prefix, so
an existing log grep or alert on that string still matches; only exact-equality assertions change,
and #1332's regression is strengthened rather than relaxed.
Guard shape follows the one already in
src/adapters/google-antigravity-replay.ts(Array.isArrayplus a per-element object check); the disposition follows #1332, not that site — replay skips,
because replay is a cache, and skipping is what produced K–O here.
Tests
tests/google-hardening.test.ts, alongside the existing #1332 candidate regression: a shared tableof the seven invalid
partsshapes and four invalidcontentshapes, each asserted on bothparseStreamandparseResponse; the buffered malformed-candidate and non-array-candidatescasesparameterised so each pins its own
valueType; the mid-streamcandidates: nullcase and itsall-null counterpart; an absence matrix pinning the six legal container shapes still completing; and
a well-formed text-plus-tool-call case asserted identically on both paths.
Run with the repository runner,
bun scripts/test.ts:tests/google-hardening.test.ts— 60 pass / 0 failsrc/adapters/google, plus the adapter-conformance,OpenAI-Chat-hardening, image and docs suites) — 701 pass / 0 fail
tests/sse-null-data-frame.test.tsis in that set: fix(sse): treat a data frame that parses to a non-record as malformed (#1219) #1240's root-padding behaviour is unchanged.bun x tsc --noEmit— identical output toupstream/dev@03735eca, the single pre-existingCannot find module '@napi-rs/keyring'error on both.Disclosure on the "CI green locally" box:
tests/translator-budget.test.tshas one failing test onthis machine — it shells out to
tsc --ignoreConfig, which the locally resolved compiler rejectswith
TS5023. Controlled by checking outupstream/devdetached at03735ecaand re-running: itfails identically there, so it is environmental and not from this change. The Windows suite as a
whole is known-red upstream (#1059).
Notes
invalid candidates/invalid content/invalid content partsname the rung that failed, so a broken candidate list is distinguishable in a log from awell-formed candidate whose parts are broken. The parenthesised diagnostic follows the
diagnoseInvalidToolCallsprecedent insrc/adapters/openai-chat.ts; the Google errors keep thisfile's plain
{ type: "error", message }shape rather than adopting that file'sstatus: 502/errorType, which would be a separate decision across all of them.openai-chatpreservesusageon its equivalents,but every existing structured error in
google.ts(invalid candidates,no candidates,was not valid JSON) omits it. Adding it only to the new ones would create exactly the in-diffasymmetry this PR exists to remove; making it uniform is a one-line change across all of them and
is yours to call.
nullorempty
candidatesis an error (no candidates) while the streaming parser skips the frame andwaits for a later terminal one. That is about absence at two different transport layers — a
buffered turn with no candidate has nothing to return, a streaming chunk with none is ordinary —
and it is pinned by an existing test, so it is out of scope here.
untyped on the way out: a
functionCallthat is not a record, or one with a missing, blank ornon-string
name, produces atool_call_startwithname: undefined, and a non-stringpart.textreachestext_deltaas a number or object.openai-chatnow rejects the equivalentsvia
diagnoseInvalidToolCalls/unnamedToolCallEvent, but Google delivers a tool call whole inone part instead of assembling it across deltas, so whether that disposition transfers is a policy
call rather than a parity fix. Filed as [Bug] Google adapter: non-conforming part fields cross the AdapterEvent boundary (nameless tool calls, non-string text) #2233 with reproductions for all fourteen shapes rather
than folded in here — say the word if you would rather it rode along.
docs-site/src/content/docs/reference/adapters.mdgains one bullet, since the new messages areoperator-visible. The
ja/ko/ru/zh-cnmirrors carry two bullets in this sectionagainst the English four — they are already missing the inline-image bullet that predates this PR,
so they are incomplete rather than contradicting, and are left for a translation pass that closes
the whole section at once.
real defect I had not seen, and it changed the fix.
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Bug Fixes
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