CodeSampleX

Exemple

body-parser 1.20.3: bodyParser, bodyParser.json, bodyParser.urlencoded

Échantillon vérifié pour npm body-parser 1.20.3: bodyParser, bodyParser.json, bodyParser.urlencoded. Le contrat s'est exécuté sur node 22 · linux debian/x64…

sha256:fdcdaf3c4c32d9a0f67fd263eccf10fdf6ad9131da6f34689ed3e41fe2c3e7b3

Ce réseau offre une seule chose : un échantillon qui compile. Il l'a exécuté dans un bac à sable et conservé le reçu signé. Il ne note rien et ne garantit rien : si le même code compile chez vous, il ne l'a pas mesuré. Combien de clés de signature distinctes ont déposé un reçu de contrat réussi. Une seule, c'est l'auteur ; plus d'une signifie que quelqu'un d'autre l'a compilé aussi. Une clé est auto-générée sans identité enregistrée derrière, donc on compte des clés, pas des personnes. MIT-0

Preuves d'exécution

L'environnement déclaré et les exécutions signées sont séparés, pour que vous voyiez exactement ce que cet échantillon a exécuté et où.

Base de preuve
Contrat signé réussi
Reçus de vérification
1
Clés de signature qui l’ont compilé
1
Environnement déclaré linux 24 · ubuntu · glibc 2.39 x64 npm

Environnements des exécutions de vérification

Environnement Contrat Étapes Exécution
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

Cas

HOW
Objectif
verify pkg:npm/body-parser@1.20.3
Paquets
Symboles
  • bodyParser
  • bodyParser.json
  • bodyParser.urlencoded
  • bodyParser.text
  • bodyParser.raw
Créé
2026-09-18T21:37:19Z

Contrat

  1. bodyParser.json parses JSON request body into javascript object
  2. bodyParser.json rejects malformed JSON with 400 status code
  3. bodyParser.json rejects payload exceeding byte limit with 413 status code
  4. bodyParser.json supports custom reviver transformation function
  5. bodyParser.urlencoded parses urlencoded form data into key-value pairs
  6. bodyParser.urlencoded with extended true parses nested object hierarchy
  7. bodyParser.text parses plain text request body into string
  8. bodyParser.raw parses request body into Buffer
  9. bodyParser verify option captures raw request body Buffer before parsing

Fichiers

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

Télécharger l’artefact source (tar.gz)

Code source

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 pkg:npm/body-parser@1.20.3
Kind: HOW

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

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:sha256:3e46a9535c76602e63e431ebad761f36be8310e145f52b8721ffe3d09858e605","contract":["bodyParser.json parses JSON request body into javascript object","bodyParser.json rejects malformed JSON with 400 status code","bodyParser.json rejects payload exceeding byte limit with 413 status code","bodyParser.json supports custom reviver transformation function","bodyParser.urlencoded parses urlencoded form data into key-value pairs","bodyParser.urlencoded with extended true parses nested object hierarchy","bodyParser.text parses plain text request body into string","bodyParser.raw parses request body into Buffer","bodyParser verify option captures raw request body Buffer before parsing"],"goal":"verify pkg:npm/body-parser@1.20.3","kind":"HOW","packages":["pkg:npm/body-parser@1.20.3"],"schemaVersion":1,"symbols":["bodyParser","bodyParser.json","bodyParser.urlencoded","bodyParser.text","bodyParser.raw"]},"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":["bodyParser","bodyParser.json","bodyParser.urlencoded","bodyParser.text","bodyParser.raw"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "sample-body-parser",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "dependencies": {
    "body-parser": "1.20.3"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/body-parser@1.20.3",
  "kind": "HOW",
  "packages": [
    "pkg:npm/body-parser@1.20.3"
  ],
  "symbols": [
    "bodyParser",
    "bodyParser.json",
    "bodyParser.urlencoded",
    "bodyParser.text",
    "bodyParser.raw"
  ]
}
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 json = bodyParser.json;
export const urlencoded = bodyParser.urlencoded;
export const text = bodyParser.text;
export const raw = bodyParser.raw;

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

function createMockReq(bodyContent, contentType) {
  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.json parses JSON request body into javascript object
{
  const parser = json();
  const req = createMockReq(JSON.stringify({ name: 'csx', active: true, count: 10 }), 'application/json');
  const body = await runMiddleware(parser, req);
  assert.deepStrictEqual(body, { name: 'csx', active: true, count: 10 });
  assert.strictEqual(req.body.name, 'csx');
  assert.strictEqual(req.body.active, true);
  assert.strictEqual(req.body.count, 10);
}

// 2. bodyParser.json rejects malformed JSON with 400 status code
{
  const parser = json();
  const req = createMockReq('{invalid json', 'application/json');
  await assert.rejects(
    async () => {
      await runMiddleware(parser, req);
    },
    (err) => {
      assert.strictEqual(err.status, 400);
      assert.strictEqual(err.type, 'entity.parse.failed');
      return true;
    }
  );
}

// 3. bodyParser.json rejects payload exceeding byte limit with 413 status code
{
  const parser = json({ limit: 15 });
  const req = createMockReq(JSON.stringify({ payload: 'larger-than-15-bytes' }), 'application/json');
  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.json supports custom reviver transformation function
{
  const parser = json({
    reviver: (key, val) => (key === 'timestamp' ? new Date(val) : val)
  });
  const req = createMockReq(JSON.stringify({ timestamp: '2026-09-18T00:00:00.000Z' }), 'application/json');
  const body = await runMiddleware(parser, req);
  assert(body.timestamp instanceof Date);
  assert.strictEqual(body.timestamp.toISOString(), '2026-09-18T00:00:00.000Z');
}

// 5. bodyParser.urlencoded parses urlencoded form data into key-value pairs
{
  const parser = urlencoded({ extended: false });
  const req = createMockReq('user=admin&role=supervisor', 'application/x-www-form-urlencoded');
  const body = await runMiddleware(parser, req);
  assert.strictEqual(body.user, 'admin');
  assert.strictEqual(body.role, 'supervisor');
}

// 6. 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', 'application/x-www-form-urlencoded');
  const body = await runMiddleware(parser, req);
  assert.strictEqual(body.config.mode, 'strict');
  assert.strictEqual(body.config.timeout, '5000');
}

// 7. bodyParser.text parses plain text request body into string
{
  const parser = text();
  const req = createMockReq('hello plain text content', 'text/plain');
  const body = await runMiddleware(parser, req);
  assert.strictEqual(typeof body, 'string');
  assert.strictEqual(body, 'hello plain text content');
}

// 8. bodyParser.raw parses request body into Buffer
{
  const parser = raw();
  const rawBytes = Buffer.from([0xca, 0xfe, 0xba, 0xbe]);
  const req = createMockReq(rawBytes, 'application/octet-stream');
  const body = await runMiddleware(parser, req);
  assert(Buffer.isBuffer(body));
  assert.deepStrictEqual(body, rawBytes);
}

// 9. bodyParser verify option captures raw request body Buffer before parsing
{
  let rawBufferCaptured = null;
  const parser = json({
    verify: (req, res, buf) => {
      rawBufferCaptured = buf;
    }
  });
  const rawJsonString = JSON.stringify({ verified: true });
  const req = createMockReq(rawJsonString, 'application/json');
  const body = await runMiddleware(parser, req);
  assert.deepStrictEqual(body, { verified: true });
  assert(Buffer.isBuffer(rawBufferCaptured));
  assert.strictEqual(rawBufferCaptured.toString('utf8'), rawJsonString);
}

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

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