Sample
axum 0.8.9: Configure request payload size limits in axum using DefaultBodyLimit to prevent automatic 413 Payload Too Large rejections on buffering extractors (Bytes, String, Json) at the default 2MB boundary, override limits per route or sub-router, and stream unbuffered raw requests without limits
Verified sample for cargo axum 0.8.9: Configure request payload size limits in axum using DefaultBodyLimit to prevent automatic 413 Payload Too Large…
sha256:adda974ec2d465cadc36ee9ef527ef98de16a608778e9bc8b0d096f4e2d504a3
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
rust linux x64 rust rust cargo
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| rust 1 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-16 |
| rust 1 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-18 |
Case
HOW- Goal
- Configure request payload size limits in axum using DefaultBodyLimit to prevent automatic 413 Payload Too Large rejections on buffering extractors (Bytes, String, Json) at the default 2MB boundary, override limits per route or sub-router, and stream unbuffered raw requests without limits
- Symbols
-
- axum::extract::DefaultBodyLimit
- axum::extract::DefaultBodyLimit::max
- axum::extract::DefaultBodyLimit::disable
- axum::extract::Json
- axum::extract::Request
- axum::body::Bytes
- axum::Router::route
- axum::Router::layer
- axum::Router::nest
- Environment
- rust
- Created
- 2026-08-16T08:07:16Z
Contract
- assert buffering extractors (Bytes, String, Json) enforce an implicit 2MB (2,097,152 bytes) limit by default
- assert a 2,097,152 byte payload succeeds with 200 OK on default routes
- assert a 2,097,153 byte payload fails with 413 PAYLOAD TOO LARGE on default routes
- assert malformed JSON exceeding 2MB returns 413 PAYLOAD TOO LARGE instead of 400 Bad Request or 422 Unprocessable Entity because body limit check precedes deserialization
- assert the 413 rejection returns Content-Type text/plain; charset=utf-8 with body 'Failed to buffer the request body: length limit exceeded'
- assert route-level DefaultBodyLimit::max overrides router-level limits to accept larger payloads
- assert route-level DefaultBodyLimit::disable allows arbitrary payload sizes without 413 rejection
- assert DefaultBodyLimit::max(0) accepts 0-byte bodies with 200 OK but rejects 1-byte bodies with 413
- assert unbuffered raw Request streaming extractors bypass DefaultBodyLimit without requiring disable()
- assert nested sub-routers enforce their own DefaultBodyLimit independently of parent router limits
Files
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs