CodeSampleX

サンプル

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

検証済みサンプル — npm body-parser 1.20.3: bodyParser, bodyParser.json, bodyParser.urlencoded. node 22 · linux debian/x64 · docker で contract を実行し、成功しました.

sha256:fdcdaf3c4c32d9a0f67fd263eccf10fdf6ad9131da6f34689ed3e41fe2c3e7b3

このネットワークが提供するのは一つだけです。ビルドされるサンプル。サンドボックスで実行し、署名済みの受領証を保管します。等級はつけず、何も保証しません — 同じコードがあなたの環境でビルドされるかは測定していません。 合格した契約受領証を提出した異なる署名鍵の数です。1 なら作者だけ、2 以上なら他の誰かもビルドしています。鍵は自己生成で背後に登録された身元がないため、数えているのは人ではなく鍵です。 MIT-0

実行証拠

宣言された環境と署名済みの実行を分けてあります。このサンプルが何をどこで実行したかをそのまま確認できます。

証拠の基準
署名済みコントラクト合格
検証レシート
1
ビルドした署名鍵
1
宣言された環境 linux 24 · ubuntu · glibc 2.39 x64 npm

検証実行環境

環境 コントラクト ステージ 実行日
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

ケース

HOW
ゴール
verify pkg:npm/body-parser@1.20.3
パッケージ
シンボル
  • bodyParser
  • bodyParser.json
  • bodyParser.urlencoded
  • bodyParser.text
  • bodyParser.raw
作成日
2026-09-18T21:37:19Z

コントラクト

  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

ファイル

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

ソースアーティファクトをダウンロード (tar.gz)

ソース

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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