Sample
express 5.2.1: Handle Express 5 silent behavior changes in default query parsing, numeric res.send/res.json status handling, and res.redirect('back')
Verified sample for npm express 5.2.1: Handle Express 5 silent behavior changes in default query parsing, numeric res.send/res.json status handling, and…
sha256:9ea5467ed4af202f10dc8512480582653e609d8f25f6ab7051747d6a4be46c37
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 Express 5 silent behavior changes in default query parsing, numeric res.send/res.json status handling, and res.redirect('back')
- Packages
- Symbols
-
- express
- req.query
- res.send
- res.json
- res.redirect
- res.sendStatus
- Environment
- node
- Created
- 2026-08-16T06:30:15Z
Contract
- assert express 5 default query parser does not parse nested bracket keys into objects and leaves req.query.filter undefined
- assert app.set('query parser', 'extended') restores nested query object parsing
- assert res.send(204) in express 5 responds with HTTP status 200 and body '204' instead of HTTP 204 No Content
- assert res.sendStatus(204) in express 5 correctly responds with HTTP 204 No Content
- assert res.json(404, obj) in express 5 ignores the second argument and responds with HTTP status 200 and body '404'
- assert res.status(404).json(obj) in express 5 correctly responds with HTTP 404 and the JSON payload
- assert res.redirect('back') in express 5 sets Location: back literally without reading the Referer header
- assert res.redirect(req.get('Referrer') || '/') redirects to the Referer header URL
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- src/app.mjs
- test/contract.mjs