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fix(dev): resolve public assets dynamically in the worker - #4549
fix(dev): resolve public assets dynamically in the worker#4549meta-syntax wants to merge 2 commits into
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: Organization UI Review profile: CHILL Plan: Pro Plus Run ID: 📒 Files selected for processing (2)
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Included review availability: Your plan provides up to 10 included reviews per hour; 8 remain after this review. 📝 WalkthroughWalkthroughDevelopment public-asset resolution now applies a relative-path containment check. ChangesPublic asset resolution
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk:⚪ Minimal · up to This fixes internal public-asset fetches in development while leaving production behavior unchanged; no actionable merge-blocking risk remains after normal checks and review. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches 💡 1🛠️ Fix failing CI checks 💡
🧪 Generate unit tests (beta)
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Actionable comments posted: 2
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Inline comments:
In `@src/build/virtual/public-assets.ts`:
- Around line 98-100: Remove the explanatory comment near the development asset
resolver in src/build/virtual/public-assets.ts at lines 98-100 and the
random-port configuration comment in test/tests.ts at line 134; leave the
surrounding implementation unchanged.
- Around line 134-135: Update the containment check in the public-assets path
handling around fullPath to use a platform-neutral relative-path calculation
instead of startsWith(dir + '/'). Reject paths escaping dir while allowing valid
descendants on Windows and Unix, preserving the existing asset-serving behavior.
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Fix all unresolved CodeRabbit comments on this PR:
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ℹ️ Review info
⚙️ Run configuration
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro Plus
Run ID: 0e7ce0d8-d7b1-4e52-a8f4-cc996eb984e5
📒 Files selected for processing (7)
build.config.tssrc/build/virtual/public-assets.tssrc/runtime/meta.tstest/fixture/server/routes/fetch-public-asset.tstest/presets/nitro-dev.test.tstest/presets/vercel.test.tstest/tests.ts
Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review.
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🔗 Linked issue
Resolves#4500
❓ Type of change
📚 Description
In dev, fetching a public asset from inside the server (e.g.
fetch("/some-asset.txt")in an event handler, orserverFetch) returns 404, while the same URL works from the browser.Root cause:
the
#nitro/virtual/public-assets-datatemplate globsoutput.publicDirat build time, but in dev nothing is ever copied there (copyPublicAssetsonly runs fornitro build).So the asset manifest baked into the dev worker bundle is always empty, and the static handler responds 404.
External requests are unaffected because the dev server process serves static dirs itself, before proxying to the worker — internal fetch never goes through that path.
Fix:
in dev, the
#nitro/virtual/public-assetstemplate no longer imports the (empty) build-time manifest.Instead it embeds the configured
publicAssetssource directories and resolves assets per request with astatSynclookup, so the worker sees the same files as the dev server process — including files added or removed after startup, without a rebuild.Notes:
etagis generated in dev, matching the dev server's own static handling (createServeStaticDirHandler), which relies onmtime/sizeonly.mimeis used by the generated dev runtime code, so it is added toruntimeDependenciesandtracePkgs(it was already a dev dependency, used by the dev server).Tests:
added a fixture route that fetches a public asset internally.
It is covered by the shared
serveStaticsuite for prod presets, and by a new dev context withserveStatic: true(the default dev test context disablesserveStatic, so the bug was not observable there).Dev test contexts now listen on a random port so two contexts can coexist.
📝 Checklist