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fix(response): set status and Content-Length for JSON null body - #2022
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The title "fix(response): set status and Content-Length for JSON null body" matches the main change. The raw summary says lib/response.js now sets status to 200 when no explicit status exists, and set… |
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The title "fix(response): set status and Content-Length for JSON null body" matches the main change. The raw summary says lib/response.js now sets status to 200 when no explicit status exists, and sets Content-Length from the serialized null body. The added tests cover that behavior. The title is specific and follows a conventional commit style. The objectives describe the same goal.
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Reviewer's GuideFix JSON responses whose body is null or undefined by treating the serialized null body like the normal response path: defaulting to 200, preserving explicit statuses, and setting Content-Length to 4; accompanying tests cover status and stale-length regressions. Sequence diagram for JSON null response handlingsequenceDiagram
participant App
participant Context
participant Response
App->>Context: set type to application/json
App->>Context: set body to null
Context->>Response: set _body to null
alt status not explicitly set
Context->>Response: set status to 200
else status explicitly set
Context->>Response: preserve explicit status
end
Context->>Response: set length to Buffer.byteLength(_body)
Response-->>App: send JSON null with Content-Length 4
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## master #2022 +/- ##
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Coverage 99.90% 99.90%
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Files 9 9
Lines 2144 2146 +2
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+ Hits 2142 2144 +2
Misses 2 2 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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Checklist
When the response type is JSON and the body is set to
nullorundefined, Koa sendsnull, but that branch ofset bodyreturns before the usual status and length handling.ctx.type = 'json'; ctx.body = nullresponds404 Not Foundwith bodynull.ctx.body = 'hello world'; ctx.type = 'json'; ctx.body = nullkeepsContent-Length: 11while writing 4 bytes, so the client waits for bytes that never come.The branch now does what the string branch does: it sets the status to 200 unless one was set explicitly, and sets Content-Length to the length of
null. An explicit status such asctx.status = 404is kept. Apps that set the JSON type first and then assign a null result will get 200 instead of 404. #2014 changes the same lines (stream cleanup only), so whichever lands second needs a small rebase.npm run lint,npm run build && npm test(470 passing),npm run test:coverage.expected 200 "OK", got 404 "Not Found",aborted,11 !== 4). All 4 pass with this change.Summary by Sourcery
Correct response handling for JSON null bodies so status and Content-Length remain consistent with the returned payload.
Bug Fixes:
Tests:
Summary by CodeRabbit
nullbody now return the valid JSON valuenull, with the correct content length.