proxy-agent

Maps proxy protocols to `http.Agent` implementations

This module provides an http.Agent implementation which automatically uses proxy servers based off of the various proxy-related environment variables (HTTP_PROXY, HTTPS_PROXY and NO_PROXY among others).

Which proxy is used for each HTTP request is determined by the proxy-from-env module, so check its documentation for instructions on configuring your environment variables.

An LRU cache is used so that http.Agent instances are transparently re-used for subsequent HTTP requests to the same proxy server.

The currently implemented protocol mappings are listed in the table below:

Protocol	Proxy Agent for `http` requests	Proxy Agent for `https` requests	Example
`http`	http-proxy-agent	https-proxy-agent	`http://proxy-server-over-tcp.com:3128`
`https`	http-proxy-agent	https-proxy-agent	`https://proxy-server-over-tls.com:3129`
`socks(v5)`	socks-proxy-agent	socks-proxy-agent	`socks://username:password@some-socks-proxy.com:9050` (username & password are optional)
`socks5`	socks-proxy-agent	socks-proxy-agent	`socks5://username:password@some-socks-proxy.com:9050` (username & password are optional)
`socks4`	socks-proxy-agent	socks-proxy-agent	`socks4://some-socks-proxy.com:9050`
`pac-*`	pac-proxy-agent	pac-proxy-agent	`pac+http://www.example.com/proxy.pac`

Example

import * as https from 'https';
import { ProxyAgent } from 'proxy-agent';

// The correct proxy `Agent` implementation to use will be determined
// via the `http_proxy` / `https_proxy` / `no_proxy` / etc. env vars
const agent = new ProxyAgent();

// The rest works just like any other normal HTTP request
https.get('https://jsonip.com', { agent }, (res) => {
  console.log(res.statusCode, res.headers);
  res.pipe(process.stdout);
});

API

new ProxyAgent(options?: ProxyAgentOptions)

Creates an http.Agent instance which relies on the various proxy-related environment variables. An LRU cache is used, so the same http.Agent instance will be returned if identical args are passed in.