示例
express 4.19.1: Show how `trust proxy` controls whether Express reads `X-Forwarded-For` for `req.ip` and `req.ips`.
已验证示例 — npm express 4.19.1: Show how `trust proxy` controls whether Express reads `X-Forwarded-For` for `req.ip` and `req.ips`. contract 在 node 22 · linux…
sha256:3a4cd850e24a4583db4efbe2c07c6463fb853a6a7bb75a6d1f365a1b70a6bb0c
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
- Show how `trust proxy` controls whether Express reads `X-Forwarded-For` for `req.ip` and `req.ips`.
- 符号
-
- request.ip
- request.ips
- application.set
- 环境
- node
- 创建时间
- 2026-08-17T03:16:22Z
契约
- A request to `/ip` without `trust proxy` ignores `X-Forwarded-For` and `req.ip` is not the forwarded client value.
- After enabling `trust proxy`, the same route returns the first `X-Forwarded-For` hop as `req.ip`.
- In the same two cases, `req.ips` is an empty list without trust and a populated list with trust.
文件
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs