File "options.js"

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'use strict'

const dns = require('./dns')
const { createKey } = require('./util')

const normalizeOptions = (opts) => {
  const family = parseInt(opts.family ?? '0', 10)
  const keepAlive = opts.keepAlive ?? true

  const normalized = {
    // nodejs http agent options. these are all the defaults
    // but kept here to increase the likelihood of cache hits
    // https://nodejs.org/api/http.html#new-agentoptions
    keepAliveMsecs: keepAlive ? 1000 : undefined,
    maxSockets: opts.maxSockets ?? 15,
    maxTotalSockets: Infinity,
    maxFreeSockets: keepAlive ? 256 : undefined,
    scheduling: 'fifo',
    // then spread the rest of the options
    ...opts,
    // we already set these to their defaults that we want
    family,
    keepAlive,
    // our custom timeout options
    timeouts: {
      // the standard timeout option is mapped to our idle timeout
      // and then deleted below
      idle: opts.timeout ?? 0,
      connection: 0,
      response: 0,
      transfer: 0,
      ...opts.timeouts,
    },
    // get the dns options that go at the top level of socket connection
    ...dns.getOptions({ family, ...opts.dns }),
  }

  // remove timeout since we already used it to set our own idle timeout
  delete normalized.timeout

  return normalized
}

const cacheOptions = (options) => {
  const { secure } = options
  return createKey({
    secure: !!secure,
    // socket connect options
    family: options.family,
    hints: options.hints,
    localAddress: options.localAddress,
    // tls specific connect options
    strictSsl: secure ? !!options.rejectUnauthorized : false,
    ca: secure ? options.ca : null,
    cert: secure ? options.cert : null,
    key: secure ? options.key : null,
    // http agent options
    keepAlive: options.keepAlive,
    keepAliveMsecs: options.keepAliveMsecs,
    maxSockets: options.maxSockets,
    maxTotalSockets: options.maxTotalSockets,
    maxFreeSockets: options.maxFreeSockets,
    scheduling: options.scheduling,
    // timeout options
    timeouts: options.timeouts,
    // proxy
    proxy: options.proxy,
  })
}

module.exports = {
  normalizeOptions,
  cacheOptions,
}