serve-static 2.2.1

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/serve-static@2.2.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/serve-static@2.2.1
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

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.

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{
  "name": "sample-serve-static",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-serve-static",
      "version": "1.0.0",
      "dependencies": {
        "serve-static": "2.2.1"
      }
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      "license": "MIT",
      "dependencies": {
        "ms": "^2.1.3"
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      "engines": {
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      "peerDependenciesMeta": {
        "supports-color": {
          "optional": true
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      "license": "MIT"
    },
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      "version": "2.0.0",
      "resolved": "https://registry.npmjs.org/encodeurl/-/encodeurl-2.0.0.tgz",
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      "license": "MIT"
    },
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      "license": "MIT",
      "engines": {
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      "resolved": "https://registry.npmjs.org/send/-/send-1.2.1.tgz",
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      "license": "MIT",
      "dependencies": {
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        "encodeurl": "^2.0.0",
        "escape-html": "^1.0.3",
        "etag": "^1.8.1",
        "fresh": "^2.0.0",
        "http-errors": "^2.0.1",
        "mime-types": "^3.0.2",
        "ms": "^2.1.3",
        "on-finished": "^2.4.1",
        "range-parser": "^1.2.1",
        "statuses": "^2.0.2"
      },
      "engines": {
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      },
      "funding": {
        "type": "opencollective",
        "url": "https://opencollective.com/express"
      }
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    "node_modules/serve-static": {
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      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-2.2.1.tgz",
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        "escape-html": "^1.0.3",
        "parseurl": "^1.3.3",
        "send": "^1.2.0"
      },
      "engines": {
        "node": ">= 18"
      },
      "funding": {
        "type": "opencollective",
        "url": "https://opencollective.com/express"
      }
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      "license": "MIT",
      "engines": {
        "node": ">=0.6"
      }
    }
  }
}

{
  "name": "sample-serve-static",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification of serve-static",
  "main": "src/index.js",
  "dependencies": {
    "serve-static": "2.2.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/serve-static@2.2.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/serve-static@2.2.1"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

const http = require('node:http');
const serveStatic = require('serve-static');

function createStaticServer(rootPath, options = {}) {
  const serve = serveStatic(rootPath, options);

  const server = http.createServer((req, res) => {
    serve(req, res, () => {
      res.statusCode = 404;
      res.setHeader('Content-Type', 'text/plain; charset=utf-8');
      res.end('Not Found');
    });
  });

  return server;
}

module.exports = {
  createStaticServer,
  serveStatic
};

import assert from 'node:assert';
import http from 'node:http';
import path from 'node:path';
import { fileURLToPath } from 'node:url';
import { createRequire } from 'node:module';

const require = createRequire(import.meta.url);
const { createStaticServer, serveStatic } = require('../src/index.js');

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const fixturesDir = path.join(__dirname, 'fixtures');

// Assert API exported
assert.strictEqual(typeof serveStatic, 'function', 'serveStatic should be a function');
assert.strictEqual(typeof createStaticServer, 'function', 'createStaticServer should be a function');

const server = createStaticServer(fixturesDir, { index: ['index.html'] });

async function runContract() {
  await new Promise((resolve, reject) => {
    server.listen(0, '127.0.0.1', () => {
      resolve();
    });
    server.on('error', reject);
  });

  const address = server.address();
  const baseUrl = `http://127.0.0.1:${address.port}`;

  try {
    // 1. Serve existing file
    const res1 = await fetch(`${baseUrl}/hello.txt`);
    assert.strictEqual(res1.status, 200, 'Expected HTTP 200 for existing static file');
    const text1 = await res1.text();
    assert.strictEqual(text1.trim(), 'Hello from serve-static!', 'Expected correct static file content');

    // 2. Handle missing file via fallback next handler
    const res2 = await fetch(`${baseUrl}/nonexistent.txt`);
    assert.strictEqual(res2.status, 404, 'Expected HTTP 404 for nonexistent file');
    const text2 = await res2.text();
    assert.strictEqual(text2, 'Not Found', 'Expected 404 body from fallback handler');

    // 3. Serve default directory index
    const res3 = await fetch(`${baseUrl}/`);
    assert.strictEqual(res3.status, 200, 'Expected HTTP 200 for index request');
    const text3 = await res3.text();
    assert.match(text3, /<h1>Index<\/h1>/, 'Expected index.html contents served for root');

    console.log('Contract tests passed successfully.');
  } finally {
    await new Promise((resolve) => server.close(resolve));
  }
}

runContract().catch((err) => {
  console.error('Contract test failed:', err);
  process.exit(1);
});

Hello from serve-static!

<!DOCTYPE html>
<html>
<head><title>Index Page</title></head>
<body><h1>Index</h1></body>
</html>