DongHyeonkaandClaude Opus 5
b2963105a8
The keycloak project ended with four open questions that design could not
settle. A two-VM lab was built to answer them by measurement, and this is
that material: 26 experiments, 125 raw command outputs, 22 browser captures.
Follows the import procedure in README.md.
source/ the originating repository verbatim — 78 documents, 28 SVGs,
8 manifests, plus .source-revision recording the commit
final/ the SSOT
document.md 729 lines written from the 29 experiment documents, not
concatenated: what was predicted, what was measured, and
where the measurement itself was wrong
evidence/raw 125 outputs, flattened to <experiment>__<file> because
the originals collided (01-baseline.txt appeared three
times) and the audit only globs the top level
evidence/meta one per raw file; command and exitCode are null and the
README says why rather than inventing them
evidence/browser 22 captures
assets/ three diagrams through techviz
.techviz/ their VizSpecs
A separate project rather than an addition to keycloak: the B-layer answers
that project's four questions, but the A, C and D layers are about cluster
failure, SSO and operations, and one document.md should hold one subject.
The four question records there can point here through 관계.
Recorded rather than papered over: only three of the 28 diagrams were
remade. The repository forbids hand-drawn SVG and forbids titles inside the
canvas; all 28 originals carry both, so converting them is redrawing, not
reformatting. They stay in source/ and the gap is written into the document.
verify-pipeline.py passes. audit-records.py reports no issues.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
52 lines
3.1 KiB
Markdown
52 lines
3.1 KiB
Markdown
---
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kind: CONCEPT
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slug: adapter-outbound-httpclient-c06
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title: 와이어 바이트와 디코드 바이트를 따로 세고, 읽는 도중에 상한을 건다
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topic: schema-and-wire-models
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project: clean-architecture-backend-template
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status: 게시 전
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sourceRevision: 21234e38cdb9a926cbc92bb97a2aee2e4a7d2916
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rootTreeNode: concept:adapter-outbound-httpclient-c06
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evidenceCapturedOn: 2026-09-01
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assets:
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- key: adapter-outbound-httpclient-c06
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file: ../../../final/evidence/rendered/adapter-outbound-httpclient-c06.svg
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- key: adapter-outbound-httpclient-c06-diagram
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file: ../../../final/assets/diagrams/adapter-outbound-httpclient-c06.svg
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evidence:
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- ../../../final/evidence/raw/adapter-outbound-httpclient-c06.txt
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source:
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- 원본 분석 절은 analysis/11-adapter-outbound-httpclient.md#L403 이다.
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module: adapter-outbound-httpclient
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---
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# 와이어 바이트와 디코드 바이트를 따로 세고, 읽는 도중에 상한을 건다
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예산이 둘로 나뉘어 있고 강제 시점이 버퍼링 이후가 아니라 읽는 도중이며, 원격이 준 status는 채택되지 않는다.
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## 본문
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<!-- body:start -->
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`ResponseSizeLimiter`가 **와이어 바이트와 디코드 바이트를 따로** 센다 — "a compressed payload passes a wire check and then expands, so a single limit either rejects legitimate traffic or lets a **decompression bomb** through."
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## 예산이 강제되는 자리
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:::evidence key="adapter-outbound-httpclient-c06-diagram" alt="와이어 바이트 예산, 읽는 도중 상한 강제, 디코드 바이트 예산, 오류 본문 제한 읽기가 읽는 순서대로 쌓여 있다" caption="응답 크기 예산이 강제되는 자리" zoom="false"
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:::
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## 버퍼링이 끝난 뒤에는 늦다
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`CountingBoundedInputStream`이 상한을 **읽는 도중에** 적용한다 — "a response that is discovered to be too large only once it is fully buffered has already cost the memory the limit exists to protect." `BoundedErrorBody`는 오류 본문을 RFC 9457 문서를 해독할 만큼만 읽고, "The bytes never reach an exception message or a log." `toString()`은 길이와 truncated 여부만 낸다.
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## 원격이 준 status는 버린다
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`RemoteProblemDecoder`의 규칙 한 줄이 이 계층의 성격을 요약한다 — "**The wire status wins.** A remote `status` member is read and discarded, because trusting it would let an upstream **relabel a 503 as a 400 and change our retry behaviour from its own body.**" 확장 속성도 allowlist로 걸러 "an upstream cannot inject unbounded attributes into our telemetry." test 넷이 그 갈래를 고정한다(`mapsProblemJsonWithoutTrustingBodyStatus`·`dropsExtensionsThatAreNotAllowlisted`·`treatsANonProblemContentTypeAsAnEmptyProblem`·`survivesAnUnparseableProblemDocument`).
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## ResponseSizeLimiter 참조 위치
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:::evidence key="adapter-outbound-httpclient-c06" alt="코드베이스에서 ResponseSizeLimiter 를 검색한 출력 20줄. 이 기록이 세는 참조가 그 출력에 그대로 보인다." caption="ResponseSizeLimiter 코드베이스 검색 — 20줄 · exit 0" zoom="true"
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:::
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<!-- body:end -->
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