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fix(core): docusaurus serve does all the redirects, keeping the query string (AI-assisted) - #12900
Without a baseUrl, serve-handler does the docusaurus serve redirects, and they:
drop the query string: /file.html?query=1 redirects to /file
skip the trailing slash of pages with a dot in their name: /docs/2.x with trailingSlash: true
docusaurus serve now does all the redirects itself, for all baseUrls, like it already did with a baseUrl. It fixes both bugs, and the same request behaves the same with or without a baseUrl.
Status code: our redirects use 301, like the serve-handler ones they replace (see #12907).
The parsing now resolves the path against a fake parent folder: without a baseUrl, .. segments going above the root keep their serve-handler 400, and a raw //example.com/file stays a path instead of being parsed as another host.
Other changes visible in the snapshots, without a baseUrl:
//file redirects to /file with trailingSlash: undefined, like /base//file
/%E0%A4%A gets the trailing slash redirect before the 400 with trailingSlash: true, like /base/%E0%A4%A: the caching test now requests /%E0%A4%A/ to keep showing a 400
//example.com/index takes one more redirect, like /base//example.com/index
Test Plan
pnpm test packages/docusaurus/src/commands/serve: the baseUrl / rows keep the query string, and the 2 edge case tests are flipped.
The serve request handler now applies redirect normalization at root and non-root base URLs. It parses paths against a synthetic root, handles repeated slashes and clean URLs, applies trailing-slash rules, and retains query strings. Updated tests cover redirects across base URL and trailing-slash settings.
Changes: Serve redirect normalization
Layer / File(s)
Summary
Parse and normalize redirect paths packages/docusaurus/src/commands/serve/requestHandler.ts
The handler normalizes paths for root and non-root base URLs. A synthetic-root parser rejects paths that escape the root and keeps double-slash paths as paths. Redirects retain query strings.
Tests now expect 302 redirects for canonicalization and trailing-slash cases. They cover double-slash paths, query retention, malformed percent-encoding, and dotted page paths.
meta/docusaurus#12891: Adds repeated-slash normalization for non-root base URLs, which this change extends to root base URLs.
meta/docusaurus#12883: Guards against redirects from .. paths outside baseUrl; this change updates path parsing for those cases.
meta/docusaurus#12901: Builds on this change’s trailing-slash handling and adjusts how serve-handler handles trailingSlash.
Merge Risk: Minimal · previous review eb538
The redirects now apply consistently across base URLs while retaining query parameters. No actionable merge-blocking issue was identified.
Pre-merge checks: 4 · 1
Failed checks: 1 warning
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Resolution
Docstring Coverage
Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documenta…
Write docstrings for the functions missing them to satisfy the coverage threshold.
Passed checks: 4 passed
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Title check
The title identifies the redirect handling change and query string preservation.
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Full details: Docstring Coverage
Explanation
Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 2 functions across 2 files.
Resolution
Write docstrings for the functions missing them to satisfy the coverage threshold.
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only still-valid issues, skip the rest with a brief reason, keep changes
minimal, and validate.
Failed pre-merge checks:
- Docstring Coverage:
Write docstrings for the functions missing them to satisfy the coverage
threshold.
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Base automatically changed from
claude/serve-dotted-pages-slash to
mainNovember 6, 2026 16:31
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ArgosAdd this label to run UI visual regression tests. See argos.yml GH action.CLA SignedSigned Facebook CLApr: bug fixThis PR fixes a bug in a past release.
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Motivation
Without a
baseUrl, serve-handler does thedocusaurus serveredirects, and they:/file.html?query=1redirects to/file/docs/2.xwithtrailingSlash: truedocusaurus servenow does all the redirects itself, for allbaseUrls, like it already did with abaseUrl. It fixes both bugs, and the same request behaves the same with or without abaseUrl.Status code: our redirects use 301, like the serve-handler ones they replace (see #12907).
The parsing now resolves the path against a fake parent folder: without a
baseUrl,..segments going above the root keep their serve-handler 400, and a raw//example.com/filestays a path instead of being parsed as another host.Other changes visible in the snapshots, without a
baseUrl://fileredirects to/filewithtrailingSlash: undefined, like/base//file/%E0%A4%Agets the trailing slash redirect before the 400 withtrailingSlash: true, like/base/%E0%A4%A: the caching test now requests/%E0%A4%A/to keep showing a 400//example.com/indextakes one more redirect, like/base//example.com/indexTest Plan
pnpm test packages/docusaurus/src/commands/serve: thebaseUrl /rows keep the query string, and the 2 edge case tests are flipped.Test links
Deploy preview: https://deploy-preview-12900--docusaurus-2.netlify.app/
Related issues/PRs
docusaurus serveadds a trailing slash to pages with a dot in their name (AI-assisted) #12899, which adds the trailing slash to pages with a dot in their name with abaseUrl(AI-assisted)
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