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fix(fetch): encode string chunks when tracking upload streams - #11380
mayur-dhavan wants to merge 8 commits into
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Fetch upload tracking read byteLength from string chunks, got undefined, and silently sent an empty body. Encode strings as UTF-8 first.
Adds the pre-release Bug Fixes entry for the string chunk fix.
 [Medium impact] No outstanding findings block merging. SummaryEncodes string chunks as UTF-8 before The latest change adds the missing PR link to
Reviews (5) · Last reviewed commit: "docs(changelog): link pull request in pr..." · Reviewed by Greptile |
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Hi @mayur-dhavan, It would be great to run a test similar to the one reported in #11379 across all available adapters to ensure test coverage and consistency across the codebase. What do you think? |
Added tests for handling ReadableStream bodies with upload progress tracking and maxBodyLength enforcement.
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Some concrete adapter-matrix results for the coverage question above. Tested
Reverting only the For a cross-adapter regression, I'd keep the HTTP Node-stream control separate from the fetch WHATWG-stream case rather than expect the same body object to work everywhere. XHR/browser coverage is still unverified here. AI-assisted testing. |
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Summary
With the fetch adapter, a
ReadableStreamrequest body that emits strings is sent correctly on its own. OnceonUploadProgressormaxBodyLengthmakes axios wrap the stream intrackStream, the strings are read as chunks with nobyteLength, so nothing is yielded and the request goes out with an empty body. WithmaxBodyLengththe limit is never enforced either.Linked issue
Closes #11379
Changes
lib/helpers/trackStream.js: encode string chunks as UTF-8 inreadBytesbefore they are sized and counted. Byte chunks are untouched.tests/unit/helpers/trackStream.test.js: new test for string chunks (UTF-8 content and byte counts reported to the progress callback) and for byte chunks passing through unchanged.PRE_RELEASE_CHANGELOG.md: Bug Fixes entry.Validation
onUploadProgressandmaxBodyLengthcases returned"". After:onUploadProgressreturns"héllo🙂"andmaxBodyLength: 5rejects withERR_BAD_REQUEST(Request body larger than maxBodyLength limit).npx vitest run --project unit tests/unit/helpers/trackStream.test.js: 2 passed. With thelib/change stashed, the string-chunk test fails (1 failed, 1 passed).npx vitest run --project unit tests/unit/adapters/fetch.test.js tests/unit/adapters/bodyLength.test.js: 117 passed, 1 failed ("should not use inherited Symbol.iterator for request headers"). The same test fails on an unmodifiedv1.xcheckout (aa54a5e), so it is not caused by this change.npx eslinton the two changed JS files: no findings.npx prettier --check: clean after formatting.npm run build, the browser suite, and the packed-package module/smoke suites. The change does not touch exports, types or browser code. CI results to follow below.Compatibility and documentation
Patch. No API or type changes, so
index.d.ts/index.d.ctsandPRE_RELEASE_DOCS.mdneed no update. Strings in a streamed body now count by UTF-8 byte length for progress andmaxBodyLength, matching what is sent.Prepared with AI assistance (the
ai-assistedlabel is requested by AGENTS.md; I may not be able to apply it as an outside contributor, so a maintainer may need to).