CodeSampleX

Пример

body-parser 1.20.3: urlencoded

Проверенный пример — npm body-parser 1.20.3: urlencoded. Контракт выполнен на node 22 · linux debian/x64 · docker и пройден: bodyParser.urlencoded parses…

sha256:217a51d4ae0b331bf026a50925a2697cbb71f805780fa6ac207a6d6d6e77123f

Эта сеть предлагает одно: образец, который собирается. Она запустила его в песочнице и сохранила подписанную квитанцию. Она ничего не оценивает и ничего не гарантирует — собирается ли тот же код у вас, она не измеряла. Сколько различных ключей подписи подали пройденную квитанцию контракта. Один — только автор; больше одного — значит, кто-то ещё тоже собрал. Ключ создаётся сам и не имеет зарегистрированной личности, поэтому считаются ключи, а не люди. MIT-0

Свидетельства выполнения

Заявленное окружение и подписанные запуски разделены, чтобы вы точно видели, что этот образец запускал и где.

Основа свидетельства
Подписанный контракт пройден
Квитанции проверки
1
Ключи подписи, собравшие его
1
Заявленная среда linux 24 · ubuntu · glibc 2.39 x64 npm

Среды запусков проверки

Окружение Контракт Этапы Запуск
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

Кейс

HOW
Цель
verify urlencoded in pkg:npm/body-parser@1.20.3
Пакеты
Символы
  • urlencoded
Создан
2026-09-19T16:53:26Z

Контракт

  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

Файлы

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

Скачать артефакт с исходным кодом (tar.gz)

Исходный код

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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      }
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      "version": "1.20.3",
      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.3.tgz",
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        "http-errors": "2.0.0",
        "iconv-lite": "0.4.24",
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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.');

Исходный сидер

аноним