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File Content: `agent.js`

'use strict'
const LRU = require('lru-cache')
const url = require('url')

let AGENT_CACHE = new LRU({ max: 50 })
let HttpsAgent
let HttpAgent

module.exports = getAgent

function getAgent (uri, opts) {
  const parsedUri = url.parse(typeof uri === 'string' ? uri : uri.url)
  const isHttps = parsedUri.protocol === 'https:'
  const pxuri = getProxyUri(uri, opts)

  const key = [
    `https:${isHttps}`,
    pxuri
    ? `proxy:${pxuri.protocol}//${pxuri.host}:${pxuri.port}`
    : '>no-proxy<',
    `local-address:${opts.localAddress || '>no-local-address<'}`,
    `strict-ssl:${isHttps ? !!opts.strictSSL : '>no-strict-ssl<'}`,
    `ca:${(isHttps && opts.ca) || '>no-ca<'}`,
    `cert:${(isHttps && opts.cert) || '>no-cert<'}`,
    `key:${(isHttps && opts.key) || '>no-key<'}`
  ].join(':')

  if (opts.agent != null) { // `agent: false` has special behavior!
    return opts.agent
  }

  if (AGENT_CACHE.peek(key)) {
    return AGENT_CACHE.get(key)
  }

  if (pxuri) {
    const proxy = getProxy(pxuri, opts, isHttps)
    AGENT_CACHE.set(key, proxy)
    return proxy
  }

  if (isHttps && !HttpsAgent) {
    HttpsAgent = require('agentkeepalive').HttpsAgent
  } else if (!isHttps && !HttpAgent) {
    HttpAgent = require('agentkeepalive')
  }

  // If opts.timeout is zero, set the agentTimeout to zero as well. A timeout
  // of zero disables the timeout behavior (OS limits still apply). Else, if
  // opts.timeout is a non-zero value, set it to timeout + 1, to ensure that
  // the node-fetch-npm timeout will always fire first, giving us more
  // consistent errors.
  const agentTimeout = opts.timeout === 0 ? 0 : opts.timeout + 1

  const agent = isHttps ? new HttpsAgent({
    maxSockets: opts.maxSockets || 15,
    ca: opts.ca,
    cert: opts.cert,
    key: opts.key,
    localAddress: opts.localAddress,
    rejectUnauthorized: opts.strictSSL,
    timeout: agentTimeout
  }) : new HttpAgent({
    maxSockets: opts.maxSockets || 15,
    localAddress: opts.localAddress,
    timeout: agentTimeout
  })
  AGENT_CACHE.set(key, agent)
  return agent
}

function checkNoProxy (uri, opts) {
  const host = url.parse(uri).hostname.split('.').reverse()
  let noproxy = (opts.noProxy || getProcessEnv('no_proxy'))
  if (typeof noproxy === 'string') {
    noproxy = noproxy.split(/\s*,\s*/g)
  }
  return noproxy && noproxy.some(no => {
    const noParts = no.split('.').filter(x => x).reverse()
    if (!noParts.length) { return false }
    for (let i = 0; i < noParts.length; i++) {
      if (host[i] !== noParts[i]) {
        return false
      }
    }
    return true
  })
}

module.exports.getProcessEnv = getProcessEnv

function getProcessEnv (env) {
  if (!env) { return }

  let value

  if (Array.isArray(env)) {
    for (let e of env) {
      value = process.env[e] ||
        process.env[e.toUpperCase()] ||
        process.env[e.toLowerCase()]
      if (typeof value !== 'undefined') { break }
    }
  }

  if (typeof env === 'string') {
    value = process.env[env] ||
      process.env[env.toUpperCase()] ||
      process.env[env.toLowerCase()]
  }

  return value
}

function getProxyUri (uri, opts) {
  const protocol = url.parse(uri).protocol

  const proxy = opts.proxy || (
    protocol === 'https:' && getProcessEnv('https_proxy')
  ) || (
    protocol === 'http:' && getProcessEnv(['https_proxy', 'http_proxy', 'proxy'])
  )
  if (!proxy) { return null }

  const parsedProxy = (typeof proxy === 'string') ? url.parse(proxy) : proxy

  return !checkNoProxy(uri, opts) && parsedProxy
}

let HttpProxyAgent
let HttpsProxyAgent
let SocksProxyAgent
function getProxy (proxyUrl, opts, isHttps) {
  let popts = {
    host: proxyUrl.hostname,
    port: proxyUrl.port,
    protocol: proxyUrl.protocol,
    path: proxyUrl.path,
    auth: proxyUrl.auth,
    ca: opts.ca,
    cert: opts.cert,
    key: opts.key,
    timeout: opts.timeout === 0 ? 0 : opts.timeout + 1,
    localAddress: opts.localAddress,
    maxSockets: opts.maxSockets || 15,
    rejectUnauthorized: opts.strictSSL
  }

  if (proxyUrl.protocol === 'http:' || proxyUrl.protocol === 'https:') {
    if (!isHttps) {
      if (!HttpProxyAgent) {
        HttpProxyAgent = require('http-proxy-agent')
      }

      return new HttpProxyAgent(popts)
    } else {
      if (!HttpsProxyAgent) {
        HttpsProxyAgent = require('https-proxy-agent')
      }

      return new HttpsProxyAgent(popts)
    }
  }
  if (proxyUrl.protocol.startsWith('socks')) {
    if (!SocksProxyAgent) {
      SocksProxyAgent = require('socks-proxy-agent')
    }

    return new SocksProxyAgent(popts)
  }
}
Name	Size	Permission
node_modules	---	0755
CHANGELOG.md	16963 bytes	0644
LICENSE	234 bytes	0644
README.md	16875 bytes	0644
agent.js	4556 bytes	0644
cache.js	8211 bytes	0644
index.js	13782 bytes	0644
package.json	2858 bytes	0644
warning.js	862 bytes	0644
File Content: agent.js

File Content: `agent.js`
