EnvHttpProxyAgent

EnvHttpProxyAgent is a Dispatcher that reads its proxy configuration from the http_proxy, https_proxy, and no_proxy environment variables and routes requests through the appropriate proxy automatically. Import it from undici:

import { EnvHttpProxyAgent } from 'undici'

When http_proxy and https_proxy are both set, http_proxy is used for HTTP requests and https_proxy is used for HTTPS requests. If only http_proxy is set, it is used for both HTTP and HTTPS requests. If only https_proxy is set, it is used only for HTTPS requests.

no_proxy is a comma- or space-separated list of hosts that must not be proxied. Each entry may include a leading dot or *. wildcard (for example .example.com) to match subdomains, and an optional :port suffix to restrict the match to a specific port. A request bypasses the proxy when its host equals an entry or is a subdomain of one. Setting no_proxy to * bypasses the proxy for every request.

The uppercase variants HTTP_PROXY, HTTPS_PROXY, and NO_PROXY are also honored. When both the lowercase and uppercase forms of a variable are set, the lowercase form takes precedence and the uppercase form is ignored. The no_proxy value is re-read from the environment on demand, so changes to it after the agent is created take effect on subsequent requests; this does not apply when noProxy is passed as an option.

class EnvHttpProxyAgent extends Dispatcher

new EnvHttpProxyAgent(options?): EnvHttpProxyAgent

Creates a new EnvHttpProxyAgent. Any options other than httpProxy, httpsProxy, and noProxy are forwarded to the underlying Agent and ProxyAgent instances. Constructing the agent only configures it; it does not affect any request until it is registered as a dispatcher, either globally with setGlobalDispatcher() or per-request through the dispatcher option.

import { EnvHttpProxyAgent } from 'undici'

const envHttpProxyAgent = new EnvHttpProxyAgent()
// or, overriding the environment variables explicitly:
const envHttpProxyAgentWithOpts = new EnvHttpProxyAgent({
  httpProxy: 'my.proxy.server:8080',
  httpsProxy: 'my.proxy.server:8443',
  noProxy: 'localhost'
})

import { setGlobalDispatcher, fetch, EnvHttpProxyAgent } from 'undici'

const envHttpProxyAgent = new EnvHttpProxyAgent()
setGlobalDispatcher(envHttpProxyAgent)

const response = await fetch('http://localhost:3000/foo')

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

const data = await response.json() // data { foo: 'bar' }

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

const envHttpProxyAgent = new EnvHttpProxyAgent()
setGlobalDispatcher(envHttpProxyAgent)

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
}

import { EnvHttpProxyAgent, request } from 'undici'

const envHttpProxyAgent = new EnvHttpProxyAgent()

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

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

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

import { EnvHttpProxyAgent, fetch } from 'undici'

const envHttpProxyAgent = new EnvHttpProxyAgent()

const response = await fetch('http://localhost:3000/foo', {
  dispatcher: envHttpProxyAgent
})

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

const data = await response.json() // data { foo: 'bar' }

envHttpProxyAgent.dispatch(options, handler): boolean

Dispatches a request through the proxy selected for options.origin. The origin's protocol, host, and port are compared against the no_proxy configuration: when the host should be proxied, the request is routed to the HTTPS proxy agent for https: origins or the HTTP proxy agent otherwise; when the host is excluded by no_proxy, the request is sent directly through a non-proxying Agent.

This method is not normally called directly. Use the higher-level Dispatcher methods such as dispatcher.request() or the top-level request() and fetch() helpers instead.