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|
'use strict'
const DispatcherBase = require('./dispatcher-base')
const { kClose, kDestroy, kClosed, kDestroyed, kDispatch, kNoProxyAgent, kHttpProxyAgent, kHttpsProxyAgent } = require('../core/symbols')
const ProxyAgent = require('./proxy-agent')
const Agent = require('./agent')
const DEFAULT_PORTS = {
'http:': 80,
'https:': 443
}
class EnvHttpProxyAgent extends DispatcherBase {
#noProxyValue = null
#noProxyEntries = null
#opts = null
constructor (opts = {}) {
super()
this.#opts = opts
const { httpProxy, httpsProxy, noProxy, ...agentOpts } = opts
this[kNoProxyAgent] = new Agent(agentOpts)
const HTTP_PROXY = httpProxy ?? process.env.http_proxy ?? process.env.HTTP_PROXY
if (HTTP_PROXY) {
this[kHttpProxyAgent] = new ProxyAgent({ ...agentOpts, uri: HTTP_PROXY })
} else {
this[kHttpProxyAgent] = this[kNoProxyAgent]
}
const HTTPS_PROXY = httpsProxy ?? process.env.https_proxy ?? process.env.HTTPS_PROXY
if (HTTPS_PROXY) {
this[kHttpsProxyAgent] = new ProxyAgent({ ...agentOpts, uri: HTTPS_PROXY })
} else {
this[kHttpsProxyAgent] = this[kHttpProxyAgent]
}
this.#parseNoProxy()
}
[kDispatch] (opts, handler) {
const url = new URL(opts.origin)
const agent = this.#getProxyAgentForUrl(url)
return agent.dispatch(opts, handler)
}
[kClose] () {
return Promise.all([
this[kNoProxyAgent].close(),
!this[kHttpProxyAgent][kClosed] && this[kHttpProxyAgent].close(),
!this[kHttpsProxyAgent][kClosed] && this[kHttpsProxyAgent].close()
])
}
[kDestroy] (err) {
return Promise.all([
this[kNoProxyAgent].destroy(err),
!this[kHttpProxyAgent][kDestroyed] && this[kHttpProxyAgent].destroy(err),
!this[kHttpsProxyAgent][kDestroyed] && this[kHttpsProxyAgent].destroy(err)
])
}
#getProxyAgentForUrl (url) {
let { protocol, host: hostname, port } = url
// Stripping ports in this way instead of using parsedUrl.hostname to make
// sure that the brackets around IPv6 addresses are kept.
hostname = hostname.replace(/:\d*$/, '').toLowerCase()
port = Number.parseInt(port, 10) || DEFAULT_PORTS[protocol] || 0
if (!this.#shouldProxy(hostname, port)) {
return this[kNoProxyAgent]
}
if (protocol === 'https:') {
return this[kHttpsProxyAgent]
}
return this[kHttpProxyAgent]
}
#shouldProxy (hostname, port) {
if (this.#noProxyChanged) {
this.#parseNoProxy()
}
if (this.#noProxyEntries.length === 0) {
return true // Always proxy if NO_PROXY is not set or empty.
}
if (this.#noProxyValue === '*') {
return false // Never proxy if wildcard is set.
}
for (let i = 0; i < this.#noProxyEntries.length; i++) {
const entry = this.#noProxyEntries[i]
if (entry.port && entry.port !== port) {
continue // Skip if ports don't match.
}
// Don't proxy if the hostname is equal with the no_proxy host.
if (hostname === entry.hostname) {
return false
}
// Don't proxy if the hostname is the subdomain of the no_proxy host.
// Reference - https://github.com/denoland/deno/blob/6fbce91e40cc07fc6da74068e5cc56fdd40f7b4c/ext/fetch/proxy.rs#L485
if (hostname.slice(-(entry.hostname.length + 1)) === `.${entry.hostname}`) {
return false
}
}
return true
}
#parseNoProxy () {
const noProxyValue = this.#opts.noProxy ?? this.#noProxyEnv
const noProxySplit = noProxyValue.split(/[,\s]/)
const noProxyEntries = []
for (let i = 0; i < noProxySplit.length; i++) {
const entry = noProxySplit[i]
if (!entry) {
continue
}
const parsed = entry.match(/^(.+):(\d+)$/)
noProxyEntries.push({
// strip leading dot or asterisk with dot
hostname: (parsed ? parsed[1] : entry).replace(/^\*?\./, '').toLowerCase(),
port: parsed ? Number.parseInt(parsed[2], 10) : 0
})
}
this.#noProxyValue = noProxyValue
this.#noProxyEntries = noProxyEntries
}
get #noProxyChanged () {
if (this.#opts.noProxy !== undefined) {
return false
}
return this.#noProxyValue !== this.#noProxyEnv
}
get #noProxyEnv () {
return process.env.no_proxy ?? process.env.NO_PROXY ?? ''
}
}
module.exports = EnvHttpProxyAgent
|
