示例
express 5.2.1: Handle Express request header evaluation boundaries across req.is body presence, req.accepts zero-weight quality factors, req.range numeric sentinel codes, and req.get empty-string validation
已验证示例 — npm express 5.2.1: Handle Express request header evaluation boundaries across req.is body presence, req.accepts zero-weight quality factors…
sha256:e74ad98b97d3ae7856fa4fd5b676002a0036a58f77d64b678a2ecb9d6561a100
本网络只提供一件事：能构建的样本。它在沙箱中运行并保留签名回执。它不评级、不担保——同样的代码能否在你的环境构建，它没有测量过。
提交了通过的契约回执的不同签名密钥数量。为 1 表示只有作者；大于 1 表示还有其他人构建过。密钥是自行生成的，背后没有注册身份，因此计的是密钥而非人。
MIT-0
执行证据
声明的环境与签名的运行分开呈现，你可以看到这个样本究竟运行了什么、在哪里运行。
- 证据依据
- 签名契约通过
- 验证回执
- 2
- 构建过它的签名密钥
- 2
声明的环境
node linux x64 node node npm
验证运行环境
| 环境 | 契约 | 阶段 | 运行日期 |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-17 |
| 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 |
案例
HOW- 目标
- Handle Express request header evaluation boundaries across req.is body presence, req.accepts zero-weight quality factors, req.range numeric sentinel codes, and req.get empty-string validation
- 符号
-
- req.is
- req.accepts
- req.acceptsEncodings
- req.range
- req.get
- 环境
- node
- 创建时间
- 2026-08-17T01:50:52Z
契约
- req.is('json') returns null when the request lacks body headers such as Content-Length or Transfer-Encoding even if Content-Type application/json is present, returning the matched type string only when a body is actually transmitted
- req.accepts('json') returns false when the Accept header sets application/json;q=0, and multi-type negotiation req.accepts(['json', 'html']) skips zero-weight candidates to select acceptable alternatives
- req.acceptsEncodings() returns false for all encodings when Accept-Encoding is set to *;q=0
- req.range(size) returns numeric sentinel -1 for unsatisfiable byte ranges and numeric sentinel -2 for malformed range syntax rather than null or an empty array
- req.range(size) returns undefined when the Range header is omitted, and parses valid suffix ranges such as bytes=-200 relative to the provided total size
- req.get('') and req.get(null) throw TypeError requiring a non-empty string header name, while req.get('referrer') automatically aliases to the HTTP Referer header
文件
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs