minipass-fetch 4.0.1

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/minipass-fetch@4.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/minipass-fetch@4.0.1

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.

{"case":{"caseId":"case:sha256:8f500662ea0786b97022af3728436ffbf8616738520aabe7ed91451c4872f691","contract":["fetch resolves data: URIs (plain and base64) into Response instances with decoded body and Content-Type header","Headers, Request, and Response constructors normalize header names and expose json() and text() body consumers","fetch sends POST JSON requests and follows 302 redirects by default while exposing Location on redirect: 'manual' and rejecting with FetchError (type 'no-redirect') on redirect: 'error'","fetch rejects with AbortError when passed an aborted AbortSignal"],"goal":"verify pkg:npm/minipass-fetch@4.0.1","kind":"HOW","packages":["pkg:npm/minipass-fetch@4.0.1"],"schemaVersion":1,"symbols":["fetch","Headers","Request","Response","FetchError","AbortError"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","libc":"glibc","libcVersion":"2.39","moduleSystem":"esm","os":"linux","osVersionBucket":"24","packageManager":"npm","runtime":"node","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/minipass-fetch@4.0.1"],"schemaVersion":1,"subject":"pkg:npm/minipass-fetch@4.0.1","verifierAdapter":"node-typescript@1"}

{
  "name": "minipass-fetch-sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "minipass-fetch-sample",
      "version": "1.0.0",
      "dependencies": {
        "minipass-fetch": "4.0.1"
      }
    },
    "node_modules/encoding": {
      "version": "0.1.13",
      "resolved": "https://registry.npmjs.org/encoding/-/encoding-0.1.13.tgz",
      "integrity": "sha512-ETBauow1T35Y/WZMkio9jiM0Z5xjHHmJ4XmjZOq1l/dXz3lr2sRn87nJy20RupqSh1F2m3HHPSp8ShIPQJrJ3A==",
      "license": "MIT",
      "optional": true,
      "dependencies": {
        "iconv-lite": "^0.6.2"
      }
    },
    "node_modules/iconv-lite": {
      "version": "0.6.3",
      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",
      "integrity": "sha512-4fCk79wshMdzMp2rH06qWrJE4iolqLhCUH+OiuIgU++RB0+94NlDL81atO7GX55uUKueo0txHNtvEyI6D7WdMw==",
      "license": "MIT",
      "optional": true,
      "dependencies": {
        "safer-buffer": ">= 2.1.2 < 3.0.0"
      },
      "engines": {
        "node": ">=0.10.0"
      }
    },
    "node_modules/minipass": {
      "version": "7.1.3",
      "resolved": "https://registry.npmjs.org/minipass/-/minipass-7.1.3.tgz",
      "integrity": "sha512-tEBHqDnIoM/1rXME1zgka9g6Q2lcoCkxHLuc7ODJ5BxbP5d4c2Z5cGgtXAku59200Cx7diuHTOYfSBD8n6mm8A==",
      "license": "BlueOak-1.0.0",
      "engines": {
        "node": ">=16 || 14 >=14.17"
      }
    },
    "node_modules/minipass-fetch": {
      "version": "4.0.1",
      "resolved": "https://registry.npmjs.org/minipass-fetch/-/minipass-fetch-4.0.1.tgz",
      "integrity": "sha512-j7U11C5HXigVuutxebFadoYBbd7VSdZWggSe64NVdvWNBqGAiXPL2QVCehjmw7lY1oF9gOllYbORh+hiNgfPgQ==",
      "license": "MIT",
      "dependencies": {
        "minipass": "^7.0.3",
        "minipass-sized": "^1.0.3",
        "minizlib": "^3.0.1"
      },
      "engines": {
        "node": "^18.17.0 || >=20.5.0"
      },
      "optionalDependencies": {
        "encoding": "^0.1.13"
      }
    },
    "node_modules/minipass-sized": {
      "version": "1.0.3",
      "resolved": "https://registry.npmjs.org/minipass-sized/-/minipass-sized-1.0.3.tgz",
      "integrity": "sha512-MbkQQ2CTiBMlA2Dm/5cY+9SWFEN8pzzOXi6rlM5Xxq0Yqbda5ZQy9sU75a673FE9ZK0Zsbr6Y5iP6u9nktfg2g==",
      "license": "ISC",
      "dependencies": {
        "minipass": "^3.0.0"
      },
      "engines": {
        "node": ">=8"
      }
    },
    "node_modules/minipass-sized/node_modules/minipass": {
      "version": "3.3.6",
      "resolved": "https://registry.npmjs.org/minipass/-/minipass-3.3.6.tgz",
      "integrity": "sha512-DxiNidxSEK+tHG6zOIklvNOwm3hvCrbUrdtzY74U6HKTJxvIDfOUL5W5P2Ghd3DTkhhKPYGqeNUIh5qcM4YBfw==",
      "license": "ISC",
      "dependencies": {
        "yallist": "^4.0.0"
      },
      "engines": {
        "node": ">=8"
      }
    },
    "node_modules/minizlib": {
      "version": "3.1.0",
      "resolved": "https://registry.npmjs.org/minizlib/-/minizlib-3.1.0.tgz",
      "integrity": "sha512-KZxYo1BUkWD2TVFLr0MQoM8vUUigWD3LlD83a/75BqC+4qE0Hb1Vo5v1FgcfaNXvfXzr+5EhQ6ing/CaBijTlw==",
      "license": "MIT",
      "dependencies": {
        "minipass": "^7.1.2"
      },
      "engines": {
        "node": ">= 18"
      }
    },
    "node_modules/safer-buffer": {
      "version": "2.1.2",
      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
      "license": "MIT",
      "optional": true
    },
    "node_modules/yallist": {
      "version": "4.0.0",
      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
      "license": "ISC"
    }
  }
}

{
  "name": "minipass-fetch-sample",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "minipass-fetch": "4.0.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/minipass-fetch@4.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/minipass-fetch@4.0.1"
  ]
}

import assert from 'node:assert/strict'
import http from 'node:http'
import fetch from 'minipass-fetch'

const { Headers, Request, Response, FetchError, AbortError } = fetch

// 1. Offline data: URI handling (plain and base64)
const dataRes = await fetch('data:text/plain;charset=utf-8,hello%20world')
assert.equal(dataRes.status, 200)
assert.equal(dataRes.headers.get('content-type'), 'text/plain;charset=utf-8')
assert.equal(await dataRes.text(), 'hello world')

const b64Payload = Buffer.from('{"ok":true,"n":42}').toString('base64')
const b64Res = await fetch(`data:application/json;base64,${b64Payload}`)
assert.equal(b64Res.headers.get('content-type'), 'application/json')
assert.deepEqual(await b64Res.json(), { ok: true, n: 42 })

// 2. Headers, Request, Response construction and manipulation
const headers = new Headers({ 'X-Custom': 'alpha' })
headers.append('x-custom', 'beta')
assert.equal(headers.get('x-custom'), 'alpha, beta')

const reqObj = new Request('http://example.com/items', {
  method: 'POST',
  headers,
  body: JSON.stringify({ item: 'book' }),
})
assert.equal(reqObj.method, 'POST')
assert.equal(reqObj.url, 'http://example.com/items')
assert.equal(reqObj.headers.get('x-custom'), 'alpha, beta')
assert.deepEqual(await reqObj.json(), { item: 'book' })

const manualRes = new Response('created', { status: 201, headers: { 'x-id': '99' } })
assert.equal(manualRes.status, 201)
assert.equal(manualRes.headers.get('x-id'), '99')
assert.equal(await manualRes.text(), 'created')

// 3. Local HTTP loopback server: POST JSON, redirect follow, and manual redirect
const server = http.createServer((req, res) => {
  if (req.url === '/echo' && req.method === 'POST') {
    const chunks = []
    req.on('data', c => chunks.push(c))
    req.on('end', () => {
      const body = Buffer.concat(chunks).toString('utf8')
      res.writeHead(200, { 'Content-Type': 'application/json' })
      res.end(JSON.stringify({
        method: req.method,
        received: JSON.parse(body),
        header: req.headers['x-test'] || null,
      }))
    })
    return
  }
  if (req.url === '/redirect') {
    res.writeHead(302, { Location: '/target' })
    res.end()
    return
  }
  if (req.url === '/target') {
    res.writeHead(200, { 'Content-Type': 'text/plain' })
    res.end('reached-target')
    return
  }
  res.writeHead(404)
  res.end()
})

await new Promise(resolve => server.listen(0, '127.0.0.1', resolve))
const { port } = server.address()
const baseUrl = `http://127.0.0.1:${port}`

try {
  const postRes = await fetch(`${baseUrl}/echo`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json', 'X-Test': 'ping' },
    body: JSON.stringify({ value: 7 }),
  })
  assert.equal(postRes.status, 200)
  assert.deepEqual(await postRes.json(), {
    method: 'POST',
    received: { value: 7 },
    header: 'ping',
  })

  const followRes = await fetch(`${baseUrl}/redirect`)
  assert.equal(followRes.status, 200)
  assert.equal(await followRes.text(), 'reached-target')

  const manualRedirectRes = await fetch(`${baseUrl}/redirect`, { redirect: 'manual' })
  assert.equal(manualRedirectRes.status, 302)
  assert.equal(manualRedirectRes.headers.get('location'), `${baseUrl}/target`)

  await assert.rejects(
    fetch(`${baseUrl}/redirect`, { redirect: 'error' }),
    err => err instanceof FetchError && err.type === 'no-redirect'
  )

  const ac = new AbortController()
  ac.abort()
  await assert.rejects(
    fetch(`${baseUrl}/target`, { signal: ac.signal }),
    err => err instanceof AbortError && err.name === 'AbortError'
  )
} finally {
  await new Promise(resolve => server.close(resolve))
}