CodeSampleX

Ejemplo

pac-proxy-agent 7.2.0: PacProxyAgent

Muestra verificada para npm pac-proxy-agent 7.2.0: PacProxyAgent. El contrato se ejecutó en node 22 · linux alpine/x64 · docker y pasó.

sha256:f47ca650ab29bf31c0ffd56138a91ebe33c040abe069fbfb63e7084ce9ac4e4f

Esta red ofrece una sola cosa: una muestra que compila. La ejecutó en un sandbox y guardó el recibo firmado. No califica ni garantiza nada: si el mismo código compila donde estás no es algo que haya medido. Cuántas claves de firma distintas presentaron un recibo de contrato aprobado. Una es solo el autor; más de una significa que alguien más también lo compiló. Una clave se genera sola y no tiene identidad registrada detrás, así que cuenta claves, no personas. MIT-0

Evidencia de ejecución

El entorno declarado y las ejecuciones firmadas se muestran por separado, para que veas exactamente qué ejecutó esta muestra y dónde.

Base de evidencia
Contrato firmado aprobado
Recibos de verificación
1
Claves de firma que lo compilaron
1
Entorno declarado node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Entornos de las ejecuciones de verificación

Entorno Contrato Etapas Ejecución
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5…		 2026-08-26

Caso

HOW
Objetivo
verify PacProxyAgent in pkg:npm/pac-proxy-agent@7.2.0
Paquetes
Símbolos
  • PacProxyAgent
Entorno
node 22.23.2
Creado
2026-08-26T01:03:36Z

Contrato

  1. PacProxyAgent static protocols property includes supported PAC protocol schemes
  2. PacProxyAgent constructor initializes agent instance with data URI string
  3. getResolver compiles and returns a FindProxyForURL resolver function
  4. resolver routes plain hostnames to DIRECT when configured by PAC script
  5. resolver evaluates dnsDomainIs and returns designated internal proxy
  6. resolver evaluates shExpMatch wildcard and returns designated secure proxy
  7. resolver returns fallback proxy chain for unmatched external destinations
  8. PacProxyAgent constructor accepts WHATWG URL instance and custom options

Archivos

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

Descargar el artefacto de código fuente (tar.gz)

Código fuente

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 PacProxyAgent in pkg:npm/pac-proxy-agent@7.2.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/pac-proxy-agent@7.2.0
Demonstrate these symbols/APIs:
  - PacProxyAgent
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.
csx.json
{"case":{"caseId":"case:sha256:bf34780ba638aa95212ca0ae1192cff4ecca8ccf96b11aefb68830087c41fc8d","constraints":{"executionContext":"node"},"contract":["PacProxyAgent static protocols property includes supported PAC protocol schemes","PacProxyAgent constructor initializes agent instance with data URI string","getResolver compiles and returns a FindProxyForURL resolver function","resolver routes plain hostnames to DIRECT when configured by PAC script","resolver evaluates dnsDomainIs and returns designated internal proxy","resolver evaluates shExpMatch wildcard and returns designated secure proxy","resolver returns fallback proxy chain for unmatched external destinations","PacProxyAgent constructor accepts WHATWG URL instance and custom options"],"goal":"verify PacProxyAgent in pkg:npm/pac-proxy-agent@7.2.0","kind":"HOW","packages":["pkg:npm/pac-proxy-agent@7.2.0"],"schemaVersion":1,"symbols":["PacProxyAgent"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"cjs","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/pac-proxy-agent@7.2.0"],"schemaVersion":1,"subject":"pkg:npm/pac-proxy-agent@7.2.0","symbols":["PacProxyAgent"],"verifierAdapter":"node-typescript@1"}
package-lock.json
{
  "name": "sample-pac-proxy-agent",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-pac-proxy-agent",
      "version": "1.0.0",
      "dependencies": {
        "pac-proxy-agent": "7.2.0"
      }
    },
    "node_modules/@tootallnate/quickjs-emscripten": {
      "version": "0.23.0",
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      "license": "MIT"
    },
    "node_modules/agent-base": {
      "version": "7.1.4",
      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-7.1.4.tgz",
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        "debug": "4"
      },
      "engines": {
        "node": ">= 14"
      }
    },
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      "license": "MIT",
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    "node_modules/pac-proxy-agent": {
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        "http-proxy-agent": "^7.0.0",
        "https-proxy-agent": "^7.0.6",
        "pac-resolver": "^7.0.1",
        "socks-proxy-agent": "^8.0.5"
      },
      "engines": {
        "node": ">= 14"
      }
    },
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      "engines": {
        "node": ">= 6.0.0",
        "npm": ">= 3.0.0"
      }
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        "node": ">= 14"
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      "license": "BSD-3-Clause",
      "optional": true,
      "engines": {
        "node": ">=0.10.0"
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      "license": "0BSD"
    }
  }
}
package.json
{
  "name": "sample-pac-proxy-agent",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "dependencies": {
    "pac-proxy-agent": "7.2.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify PacProxyAgent in pkg:npm/pac-proxy-agent@7.2.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/pac-proxy-agent@7.2.0"
  ],
  "symbols": [
    "PacProxyAgent"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
test/contract.mjs
import assert from 'node:assert/strict';
import { PacProxyAgent } from 'pac-proxy-agent';

// 1. PacProxyAgent static protocols property includes supported PAC protocol schemes
assert.ok(Array.isArray(PacProxyAgent.protocols));
assert.ok(PacProxyAgent.protocols.includes('pac+data'));
assert.ok(PacProxyAgent.protocols.includes('pac+file'));
assert.ok(PacProxyAgent.protocols.includes('pac+http'));
assert.ok(PacProxyAgent.protocols.includes('pac+https'));

// 2. PacProxyAgent constructor initializes agent instance with data URI string
const pacScript = `
  function FindProxyForURL(url, host) {
    if (isPlainHostName(host)) {
      return 'DIRECT';
    }
    if (dnsDomainIs(host, '.internal.example.com')) {
      return 'PROXY proxy-int.example.com:8080';
    }
    if (shExpMatch(host, '*.secure.example.com')) {
      return 'HTTPS proxy-sec.example.com:8443';
    }
    return 'PROXY proxy-default.example.com:3128; DIRECT';
  }
`;
const dataUri = `data:text/plain;charset=utf-8,${encodeURIComponent(pacScript)}`;
const agent = new PacProxyAgent(dataUri);

assert.ok(agent instanceof PacProxyAgent);
assert.equal(agent.uri.href, dataUri);

// 3. getResolver compiles and returns a FindProxyForURL resolver function
const resolver = await agent.getResolver();
assert.equal(typeof resolver, 'function');

// 4. resolver routes plain hostnames to DIRECT when configured by PAC script
const resPlain = await resolver('http://localhost/api', 'localhost');
assert.equal(resPlain, 'DIRECT');

// 5. resolver evaluates dnsDomainIs and returns designated internal proxy
const resInternal = await resolver('http://svc.internal.example.com/data', 'svc.internal.example.com');
assert.equal(resInternal, 'PROXY proxy-int.example.com:8080');

// 6. resolver evaluates shExpMatch wildcard and returns designated secure proxy
const resSecure = await resolver('https://auth.secure.example.com/login', 'auth.secure.example.com');
assert.equal(resSecure, 'HTTPS proxy-sec.example.com:8443');

// 7. resolver returns fallback proxy chain for unmatched external destinations
const resDefault = await resolver('http://external.example.com/resource', 'external.example.com');
assert.equal(resDefault, 'PROXY proxy-default.example.com:3128; DIRECT');

// 8. PacProxyAgent constructor accepts WHATWG URL instance and custom options
const pacUrl = new URL(dataUri);
const agentWithOptions = new PacProxyAgent(pacUrl, {
  fallbackToDirect: true,
  keepAlive: true
});
assert.ok(agentWithOptions instanceof PacProxyAgent);
assert.equal(agentWithOptions.opts.fallbackToDirect, true);
assert.equal(agentWithOptions.opts.keepAlive, true);

const resolverWithOptions = await agentWithOptions.getResolver();
const resWithOptions = await resolverWithOptions('http://internal.example.com', 'internal.example.com');
assert.equal(typeof resWithOptions, 'string');

Seeder de origen

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