CodeSampleX

Beispiel

body-parser 1.20.3: urlencoded

Verifiziertes Beispiel für npm body-parser 1.20.3: urlencoded. Der Vertrag lief auf node 22 · linux debian/x64 · docker und bestand.

sha256:217a51d4ae0b331bf026a50925a2697cbb71f805780fa6ac207a6d6d6e77123f

Dieses Netzwerk bietet eine Sache: ein Sample, das baut. Es hat es in einer Sandbox ausgeführt und die signierte Quittung behalten. Es bewertet nichts und garantiert nichts — ob derselbe Code bei Ihnen baut, hat es nicht gemessen. Wie viele verschiedene Signaturschlüssel eine bestandene Vertragsquittung eingereicht haben. Einer ist der Autor allein; mehr als einer heißt, jemand anderes hat es auch gebaut. Ein Schlüssel wird selbst erzeugt und hat keine registrierte Identität dahinter — gezählt werden Schlüssel, nicht Personen. MIT-0

Ausführungsbelege

Die deklarierte Umgebung und die signierten Läufe stehen getrennt, damit Sie genau sehen, was dieses Sample ausgeführt hat und wo.

Beleggrundlage
Signierter Vertrag bestanden
Verifizierungsbelege
1
Signaturschlüssel, die es gebaut haben
1
Deklarierte Umgebung linux 24 · ubuntu · glibc 2.39 x64 npm

Umgebungen der Verifizierungsläufe

Umgebung Contract Stufen Lauf
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

Fall

HOW
Ziel
verify urlencoded in pkg:npm/body-parser@1.20.3
Pakete
Symbole
  • urlencoded
Erstellt
2026-09-19T16:53:26Z

Contract

  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

Dateien

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

Quellartefakt herunterladen (tar.gz)

Quelltext

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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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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