CodeSampleX

示例

body-parser 1.20.3: urlencoded

已验证示例 — npm body-parser 1.20.3: urlencoded. contract 在 node 22 · linux debian/x64 · docker 上运行并通过： bodyParser.urlencoded parses basic form urlencoded data…

sha256:217a51d4ae0b331bf026a50925a2697cbb71f805780fa6ac207a6d6d6e77123f

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
1
构建过它的签名密钥
1
声明的环境 linux 24 · ubuntu · glibc 2.39 x64 npm

验证运行环境

环境 契约 阶段 运行日期
node 22 · linux debian/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22@sha256:8a34c4ab3ea2…		 2026-09-19

案例

HOW
目标
verify urlencoded in pkg:npm/body-parser@1.20.3
包
符号
  • urlencoded
创建时间
2026-09-19T16:53:26Z

契约

  1. bodyParser.urlencoded parses basic form urlencoded data into key-value pairs
  2. bodyParser.urlencoded with extended true parses nested object hierarchy
  3. bodyParser.urlencoded rejects payload exceeding byte limit with 413 status code
  4. bodyParser.urlencoded verify option captures raw buffer before parsing
  5. bodyParser.urlencoded parameterLimit option rejects requests with too many parameters

文件

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.mjs
  • test/contract.mjs

下载源代码构件 (tar.gz)

源代码

PROMPT.md
Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify urlencoded in pkg:npm/body-parser@1.20.3
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/body-parser@1.20.3
Demonstrate these symbols/APIs:
  - urlencoded

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.
csx.json
{"case":{"caseId":"case:sha256:4931cf4aa70a7c31f35d5845c0297fca0537efffcea4e009f033fe81f7aeb19c","contract":["bodyParser.urlencoded parses basic form urlencoded data into key-value pairs","bodyParser.urlencoded with extended true parses nested object hierarchy","bodyParser.urlencoded rejects payload exceeding byte limit with 413 status code","bodyParser.urlencoded verify option captures raw buffer before parsing","bodyParser.urlencoded parameterLimit option rejects requests with too many parameters"],"goal":"verify urlencoded in pkg:npm/body-parser@1.20.3","kind":"HOW","packages":["pkg:npm/body-parser@1.20.3"],"schemaVersion":1,"symbols":["urlencoded"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/body-parser@1.20.3"],"schemaVersion":1,"subject":"pkg:npm/body-parser@1.20.3","symbols":["urlencoded"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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  "lockfileVersion": 3,
  "requires": true,
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package.json
{
  "name": "sample-body-parser-urlencoded",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "dependencies": {
    "body-parser": "1.20.3"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify urlencoded in pkg:npm/body-parser@1.20.3",
  "kind": "HOW",
  "packages": [
    "pkg:npm/body-parser@1.20.3"
  ],
  "symbols": [
    "urlencoded"
  ]
}
src/index.mjs
import bodyParser from 'body-parser';

export { bodyParser };

/**
 * Execute a body-parser middleware against a request stream.
 * @param {Function} middleware - body-parser middleware instance
 * @param {object} req - Request stream or mock request
 * @param {object} [res={}] - Response object
 * @returns {Promise<any>} Resolves with req.body
 */
export function runMiddleware(middleware, req, res = {}) {
  return new Promise((resolve, reject) => {
    middleware(req, res, (err) => {
      if (err) {
        return reject(err);
      }
      resolve(req.body);
    });
  });
}

export const urlencoded = bodyParser.urlencoded;

export default bodyParser;
test/contract.mjs
import assert from 'node:assert';
import { Readable } from 'node:stream';
import bodyParser, { runMiddleware, urlencoded } from '../src/index.mjs';

function createMockReq(bodyContent, contentType = 'application/x-www-form-urlencoded') {
  const req = new Readable({
    read() {
      if (bodyContent !== undefined && bodyContent !== null) {
        this.push(bodyContent);
      }
      this.push(null);
    }
  });
  const length = bodyContent ? Buffer.byteLength(bodyContent) : 0;
  req.headers = {
    'content-type': contentType,
    'content-length': length.toString()
  };
  return req;
}

// 1. bodyParser.urlencoded parses basic form urlencoded data into key-value pairs
{
  const parser = urlencoded({ extended: false });
  const req = createMockReq('user=alice&role=engineer');
  const body = await runMiddleware(parser, req);
  assert.strictEqual(body.user, 'alice');
  assert.strictEqual(body.role, 'engineer');
}

// 2. bodyParser.urlencoded with extended true parses nested object hierarchy
{
  const parser = urlencoded({ extended: true });
  const req = createMockReq('config%5Bmode%5D=strict&config%5Btimeout%5D=5000');
  const body = await runMiddleware(parser, req);
  assert.deepStrictEqual(body.config, { mode: 'strict', timeout: '5000' });
}

// 3. bodyParser.urlencoded rejects payload exceeding byte limit with 413 status code
{
  const parser = urlencoded({ extended: false, limit: 10 });
  const req = createMockReq('param=payload-that-exceeds-ten-bytes');
  await assert.rejects(
    async () => {
      await runMiddleware(parser, req);
    },
    (err) => {
      assert.strictEqual(err.status, 413);
      assert.strictEqual(err.type, 'entity.too.large');
      return true;
    }
  );
}

// 4. bodyParser.urlencoded verify option captures raw buffer before parsing
{
  let rawBufferCaptured = null;
  const parser = urlencoded({
    extended: false,
    verify: (req, res, buf) => {
      rawBufferCaptured = buf;
    }
  });
  const payload = 'greeting=hello&target=world';
  const req = createMockReq(payload);
  const body = await runMiddleware(parser, req);
  assert.strictEqual(body.greeting, 'hello');
  assert.strictEqual(body.target, 'world');
  assert(Buffer.isBuffer(rawBufferCaptured));
  assert.strictEqual(rawBufferCaptured.toString('utf8'), payload);
}

// 5. bodyParser.urlencoded parameterLimit option rejects requests with too many parameters
{
  const parser = urlencoded({ extended: false, parameterLimit: 2 });
  const req = createMockReq('a=1&b=2&c=3');
  await assert.rejects(
    async () => {
      await runMiddleware(parser, req);
    },
    (err) => {
      assert.strictEqual(err.status, 413);
      assert.strictEqual(err.type, 'parameters.too.many');
      return true;
    }
  );
}

console.log('Contract tests passed successfully.');

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