Sample
express 5.2.1: Handle res.sendFile synchronous TypeError on relative paths without root instead of relying on callback error delivery
Verified sample for npm express 5.2.1: Handle res.sendFile synchronous TypeError on relative paths without root instead of relying on callback error…
sha256:049461217043c6d8c1c09f52eb8165128687f3ba42c2719d739ee74487cea915
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
node linux x64 node node npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-16 |
| node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-18 |
Case
HOW- Goal
- Handle res.sendFile synchronous TypeError on relative paths without root instead of relying on callback error delivery
- Packages
- Symbols
-
- res.sendFile
- res.download
- Environment
- node
- Created
- 2026-08-16T16:34:45Z
Contract
- res.sendFile with a relative path and no root option synchronously throws a TypeError instead of invoking the completion callback or passing an ENOENT error
- res.download with a relative path resolves the path relative to the current working directory without throwing TypeError
- res.sendFile with a root option passes ENOENT to the completion callback with HTTP 404 status when the file does not exist
- res.sendFile with a root option passes ForbiddenError to the completion callback with HTTP 403 status on directory traversal outside root
- res.sendFile throws TypeError when path is empty string or a non-string type
Files
- NOTES.md
- csx.json
- fixtures/sample.txt
- package-lock.json
- package.json
- test/contract.mjs