CodeSampleX

示例

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

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

sha256:fdcdaf3c4c32d9a0f67fd263eccf10fdf6ad9131da6f34689ed3e41fe2c3e7b3

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 pkg:npm/body-parser@1.20.3
包
符号
  • bodyParser
  • bodyParser.json
  • bodyParser.urlencoded
  • bodyParser.text
  • bodyParser.raw
创建时间
2026-09-18T21:37:19Z

契约

  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

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 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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  "lockfileVersion": 3,
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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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