Class: ProxyAgent

Extends: undici.Dispatcher

A Proxy Agent class that implements the Agent API. It allows the connection through proxy in a simple way.

new ProxyAgent([options])

Arguments:

• options ProxyAgentOptions (required) - It extends the Agent options.

Returns: ProxyAgent

Parameter: ProxyAgentOptions

Extends: AgentOptions

It ommits AgentOptions#connect.

• uri string | URL (required) - The URI of the proxy server. This can be provided as a string, as an instance of the URL class, or as an object with a uri property of type string. If the uri is provided as a string or uri is an object with an uri property of type string, then it will be parsed into a URL object according to the WHATWG URL Specification. For detailed information on the parsing process and potential validation errors, please refer to the "Writing" section of the WHATWG URL Specification.
• token string (optional) - It can be passed by a string of token for authentication.
• auth string (deprecated) - Use token.
• clientFactory (origin: URL, opts: Object) => Dispatcher (optional) - Default: (origin, opts) => new Pool(origin, opts)
• requestTls BuildOptions (optional) - Options object passed when creating the underlying socket via the connector builder for the request. It extends from Client#ConnectOptions.
• proxyTls BuildOptions (optional) - Options object passed when creating the underlying socket via the connector builder for the proxy server. It extends from Client#ConnectOptions.

Examples:

import { ProxyAgent } from 'undici'

const proxyAgent = new ProxyAgent('my.proxy.server')
// or
const proxyAgent = new ProxyAgent(new URL('my.proxy.server'))
// or
const proxyAgent = new ProxyAgent({ uri: 'my.proxy.server' })
// or
const proxyAgent = new ProxyAgent({
  uri: new URL('my.proxy.server'),
  proxyTls: {
    signal: AbortSignal.timeout(1000)
  }
})

Example - Basic ProxyAgent instantiation

This will instantiate the ProxyAgent. It will not do anything until registered as the agent to use with requests.

import { ProxyAgent } from 'undici'

const proxyAgent = new ProxyAgent('my.proxy.server')

Example - Basic Proxy Request with global agent dispatcher

import { setGlobalDispatcher, request, ProxyAgent } from 'undici'

const proxyAgent = new ProxyAgent('my.proxy.server')
setGlobalDispatcher(proxyAgent)

const { statusCode, body } = await request('http://localhost:3000/foo')

console.log('response received', statusCode) // response received 200

for await (const data of body) {
  console.log('data', data.toString('utf8')) // data foo
}

Example - Basic Proxy Request with local agent dispatcher

import { ProxyAgent, request } from 'undici'

const proxyAgent = new ProxyAgent('my.proxy.server')

const {
  statusCode,
  body
} = await request('http://localhost:3000/foo', { dispatcher: proxyAgent })

console.log('response received', statusCode) // response received 200

for await (const data of body) {
  console.log('data', data.toString('utf8')) // data foo
}

Example - Basic Proxy Request with authentication

import { setGlobalDispatcher, request, ProxyAgent } from 'undici';

const proxyAgent = new ProxyAgent({
  uri: 'my.proxy.server',
  // token: 'Bearer xxxx'
  token: `Basic ${Buffer.from('username:password').toString('base64')}`
});
setGlobalDispatcher(proxyAgent);

const { statusCode, body } = await request('http://localhost:3000/foo');

console.log('response received', statusCode); // response received 200

for await (const data of body) {
  console.log('data', data.toString('utf8')); // data foo
}

ProxyAgent.close()

Closes the proxy agent and waits for registered pools and clients to also close before resolving.

Returns: Promise<void>

Example - clean up after tests are complete

import { ProxyAgent, setGlobalDispatcher } from 'undici'

const proxyAgent = new ProxyAgent('my.proxy.server')
setGlobalDispatcher(proxyAgent)

await proxyAgent.close()

ProxyAgent.dispatch(options, handlers)

Implements Agent.dispatch(options, handlers).

ProxyAgent.request(options[, callback])

See Dispatcher.request(options [, callback]).

Example - ProxyAgent with Fetch

This example demonstrates how to use fetch with a proxy via ProxyAgent. It is particularly useful for scenarios requiring proxy tunneling.

import { ProxyAgent, fetch } from 'undici';

// Define the ProxyAgent
const proxyAgent = new ProxyAgent('http://localhost:8000');

// Make a GET request through the proxy
const response = await fetch('http://localhost:3000/foo', {
  dispatcher: proxyAgent,
  method: 'GET',
});

console.log('Response status:', response.status);
console.log('Response data:', await response.text());

---

Example - ProxyAgent with a Custom Proxy Server

This example shows how to create a custom proxy server and use it with ProxyAgent.

import * as http from 'node:http';
import { createProxy } from 'proxy';
import { ProxyAgent, fetch } from 'undici';

// Create a proxy server
const proxyServer = createProxy(http.createServer());
proxyServer.listen(8000, () => {
  console.log('Proxy server running on port 8000');
});

// Define and use the ProxyAgent
const proxyAgent = new ProxyAgent('http://localhost:8000');

const response = await fetch('http://example.com', {
  dispatcher: proxyAgent,
  method: 'GET',
});

console.log('Response status:', response.status);
console.log('Response data:', await response.text());

---

Example - ProxyAgent with HTTPS Tunneling

This example demonstrates how to perform HTTPS tunneling using a proxy.

import { ProxyAgent, fetch } from 'undici';

// Define a ProxyAgent for HTTPS proxy
const proxyAgent = new ProxyAgent('https://secure.proxy.server');

// Make a request to an HTTPS endpoint via the proxy
const response = await fetch('https://secure.endpoint.com/api/data', {
  dispatcher: proxyAgent,
  method: 'GET',
});

console.log('Response status:', response.status);
console.log('Response data:', await response.json());

Example - ProxyAgent as a Global Dispatcher

ProxyAgent can be configured as a global dispatcher, making it available for all requests without explicitly passing it. This simplifies code and is useful when a single proxy configuration applies to all requests.

import { ProxyAgent, setGlobalDispatcher, fetch } from 'undici';

// Define and configure the ProxyAgent
const proxyAgent = new ProxyAgent('http://localhost:8000');
setGlobalDispatcher(proxyAgent);

// Make requests without specifying the dispatcher
const response = await fetch('http://example.com');
console.log('Response status:', response.status);
console.log('Response data:', await response.text());