CodeSampleX

Exemple

proxy-agent 6.5.0: ProxyAgent

Échantillon vérifié pour npm proxy-agent 6.5.0: ProxyAgent. Le contrat s'est exécuté sur node 22 · linux alpine/x64 · docker et a réussi.

sha256:80955dbb51409199ea7bd68302fd48aefe43a3cf20f9236cff387ab1d1373f4d

Ce réseau offre une seule chose : un échantillon qui compile. Il l'a exécuté dans un bac à sable et conservé le reçu signé. Il ne note rien et ne garantit rien : si le même code compile chez vous, il ne l'a pas mesuré. Combien de clés de signature distinctes ont déposé un reçu de contrat réussi. Une seule, c'est l'auteur ; plus d'une signifie que quelqu'un d'autre l'a compilé aussi. Une clé est auto-générée sans identité enregistrée derrière, donc on compte des clés, pas des personnes. MIT-0

Preuves d'exécution

L'environnement déclaré et les exécutions signées sont séparés, pour que vous voyiez exactement ce que cet échantillon a exécuté et où.

Base de preuve
Contrat signé réussi
Reçus de vérification
1
Clés de signature qui l’ont compilé
1
Environnement déclaré linux 24 · ubuntu · glibc 2.39 x64 npm

Environnements des exécutions de vérification

Environnement Contrat Étapes Exécution
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…		 2026-08-27

Cas

HOW
Objectif
verify proxy-agent.ProxyAgent in pkg:npm/proxy-agent@6.5.0
Paquets
Symboles
  • proxy-agent.ProxyAgent
Créé
2026-08-27T11:23:33Z

Contrat

  1. ProxyAgent class export and proxies protocol map
  2. ProxyAgent constructor default configuration
  3. connect returns default httpAgent and httpsAgent when no proxy is configured
  4. connect resolves and caches HttpProxyAgent for HTTP proxy
  5. caching reuses the agent instance for identical protocol and proxy destination
  6. connect resolves HttpsProxyAgent for secure endpoint via HTTP proxy
  7. connect resolves SocksProxyAgent for SOCKS5 proxy URL
  8. connect resolves PacProxyAgent for PAC data URI
  9. connect throws on unsupported proxy protocol
  10. destroy cleans up and invokes destroy on cached agents

Fichiers

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

Télécharger l’artefact source (tar.gz)

Code source

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 proxy-agent.ProxyAgent in pkg:npm/proxy-agent@6.5.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/proxy-agent@6.5.0
Demonstrate these symbols/APIs:
  - proxy-agent.ProxyAgent

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:sha256:8e5ce4c7ac862889c23527e299474f3b4c39378d18198e658458045ed53e44ff","contract":["ProxyAgent class export and proxies protocol map","ProxyAgent constructor default configuration","connect returns default httpAgent and httpsAgent when no proxy is configured","connect resolves and caches HttpProxyAgent for HTTP proxy","caching reuses the agent instance for identical protocol and proxy destination","connect resolves HttpsProxyAgent for secure endpoint via HTTP proxy","connect resolves SocksProxyAgent for SOCKS5 proxy URL","connect resolves PacProxyAgent for PAC data URI","connect throws on unsupported proxy protocol","destroy cleans up and invokes destroy on cached agents"],"goal":"verify proxy-agent.ProxyAgent in pkg:npm/proxy-agent@6.5.0","kind":"HOW","packages":["pkg:npm/proxy-agent@6.5.0"],"schemaVersion":1,"symbols":["proxy-agent.ProxyAgent"]},"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/proxy-agent@6.5.0"],"schemaVersion":1,"subject":"pkg:npm/proxy-agent@6.5.0","symbols":["proxy-agent.ProxyAgent"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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  "name": "sample-proxy-agent",
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  "lockfileVersion": 3,
  "requires": true,
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      "name": "sample-proxy-agent",
      "version": "1.0.0",
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      }
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      "license": "MIT"
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        "pac-resolver": "^7.0.1",
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      },
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    },
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      "engines": {
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      }
    },
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        "proxy-from-env": "^1.1.0",
        "socks-proxy-agent": "^8.0.5"
      },
      "engines": {
        "node": ">= 14"
      }
    },
    "node_modules/proxy-from-env": {
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        "debug": "^4.3.4",
        "socks": "^2.8.3"
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      "engines": {
        "node": ">= 14"
      }
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      "license": "BSD-3-Clause",
      "optional": true,
      "engines": {
        "node": ">=0.10.0"
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      "version": "2.8.1",
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      "license": "0BSD"
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}
package.json
{
  "name": "sample-proxy-agent",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "dependencies": {
    "proxy-agent": "6.5.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify proxy-agent.ProxyAgent in pkg:npm/proxy-agent@6.5.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/proxy-agent@6.5.0"
  ],
  "symbols": [
    "proxy-agent.ProxyAgent"
  ]
}
test/contract.mjs
import assert from 'node:assert/strict';
import http from 'node:http';
import https from 'node:https';
import { ProxyAgent, proxies } from 'proxy-agent';

// 1. Verify ProxyAgent class export and proxies protocol map
assert.equal(typeof ProxyAgent, 'function');
assert.equal(typeof proxies, 'object');
assert.ok(Array.isArray(proxies.http));
assert.ok(Array.isArray(proxies.https));
assert.ok(Array.isArray(proxies.socks));
assert.ok(Array.isArray(proxies.socks5));
assert.ok(Array.isArray(proxies['pac+data']));

// 2. Verify ProxyAgent constructor default configuration
const defaultAgent = new ProxyAgent();
assert.ok(defaultAgent instanceof ProxyAgent);
assert.ok(defaultAgent.httpAgent instanceof http.Agent);
assert.ok(defaultAgent.httpsAgent instanceof https.Agent);
assert.equal(typeof defaultAgent.getProxyForUrl, 'function');
assert.equal(defaultAgent.cache.size, 0);

// Helper to create mock ClientRequest without opening real sockets
function createMockRequest(host, path = '/', headers = {}) {
  const headerMap = new Map(Object.entries(headers).map(([k, v]) => [k.toLowerCase(), v]));
  headerMap.set('host', host);
  return {
    path,
    getHeader(name) {
      return headerMap.get(name.toLowerCase());
    }
  };
}

// 3. Verify connect returns default httpAgent and httpsAgent when no proxy is configured
const directAgent = new ProxyAgent({
  getProxyForUrl: () => ''
});
const reqHttp = createMockRequest('example.com', '/test');
const resolvedHttp = await directAgent.connect(reqHttp, { secureEndpoint: false });
assert.equal(resolvedHttp, directAgent.httpAgent);

const reqHttps = createMockRequest('example.com', '/secure');
const resolvedHttps = await directAgent.connect(reqHttps, { secureEndpoint: true });
assert.equal(resolvedHttps, directAgent.httpsAgent);

// 4. Verify connect resolves and caches HttpProxyAgent for HTTP proxy
const customAgent = new ProxyAgent({
  getProxyForUrl: (url) => {
    if (url.includes('proxy.example.com')) {
      return 'http://127.0.0.1:8080';
    }
    return '';
  }
});
const reqProxied = createMockRequest('proxy.example.com', '/api');
const resolvedHttpProxy = await customAgent.connect(reqProxied, { secureEndpoint: false });
assert.equal(resolvedHttpProxy.constructor.name, 'HttpProxyAgent');
assert.equal(customAgent.cache.size, 1);

// 5. Verify caching reuses the agent instance for identical protocol and proxy destination
const resolvedAgain = await customAgent.connect(reqProxied, { secureEndpoint: false });
assert.equal(resolvedAgain, resolvedHttpProxy);
assert.equal(customAgent.cache.size, 1);

// 6. Verify connect resolves HttpsProxyAgent for secure endpoint via HTTP proxy
const reqSecureProxied = createMockRequest('proxy.example.com', '/secure-api');
const resolvedHttpsProxy = await customAgent.connect(reqSecureProxied, { secureEndpoint: true });
assert.equal(resolvedHttpsProxy.constructor.name, 'HttpsProxyAgent');
assert.equal(customAgent.cache.size, 2);

// 7. Verify connect resolves SocksProxyAgent for SOCKS5 proxy URL
const socksAgent = new ProxyAgent({
  getProxyForUrl: () => 'socks5://127.0.0.1:1080'
});
const reqSocks = createMockRequest('socks.example.com', '/data');
const resolvedSocks = await socksAgent.connect(reqSocks, { secureEndpoint: false });
assert.equal(resolvedSocks.constructor.name, 'SocksProxyAgent');

// 8. Verify connect resolves PacProxyAgent for PAC data URI
const pacScript = 'function FindProxyForURL(url, host) { return "DIRECT"; }';
const pacDataUri = `pac+data:text/plain;charset=utf-8,${encodeURIComponent(pacScript)}`;
const pacAgent = new ProxyAgent({
  getProxyForUrl: () => pacDataUri
});
const reqPac = createMockRequest('pac.example.com', '/resource');
const resolvedPac = await pacAgent.connect(reqPac, { secureEndpoint: false });
assert.equal(resolvedPac.constructor.name, 'PacProxyAgent');

// 9. Verify connect throws on unsupported proxy protocol
const invalidProtoAgent = new ProxyAgent({
  getProxyForUrl: () => 'ftp://127.0.0.1:21'
});
const reqInvalid = createMockRequest('invalid.example.com', '/');
await assert.rejects(
  async () => {
    await invalidProtoAgent.connect(reqInvalid, { secureEndpoint: false });
  },
  {
    name: 'Error',
    message: /Unsupported protocol for proxy URL: ftp:\/\/127\.0\.0\.1:21/
  }
);

// 10. Verify destroy cleans up and invokes destroy on cached agents
let destroyedCalled = false;
resolvedHttpProxy.destroy = () => {
  destroyedCalled = true;
};
customAgent.destroy();
assert.equal(destroyedCalled, true);

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