How to use the agentkeepalive.HttpsAgent function in agentkeepalive

debug(`Initializing Sentry (enabled: ${process.env.NODE_ENV === 'production'})`);
    Sentry.init({
        debug: process.env.NODE_ENV !== 'production',
        dsn: 'https://4064eff091454347b283cc8b939a99a0@sentry.io/1318977',
        enabled: process.env.NODE_ENV === 'production',
        release: `evie-server@${version}`,
    });

    debug('Creating axios instance');
    axiosInstance = axios.create({
        // 60 sec timeout
        timeout: 60000,

        // keepAlive pools and reuses TCP connections, so it's faster
        httpsAgent: new HttpsAgent(),

        // follow up to 10 HTTP 3xx redirects
        maxRedirects: 10,

        // cap the maximum content length we'll accept to 50MBs, just in case
        maxContentLength: 50 * 1000 * 1000,
    });

    debug('Creating CacheController instance');
    const defaultExpireTimes: IDefaultExpireTimes = {};
    defaultExpireTimes[EVE.SDEURL] = 7200000; // 2 hours
    esiCache = new CacheController('data/responseCache.json', defaultExpireTimes);

    debug('Creating PublicESIService instance');
    esiService = new PublicESIService({
        axiosInstance,

const fs = require('fs');
const algolia = require('algoliasearch');
const HttpsAgent = require('agentkeepalive').HttpsAgent;
const keepaliveAgent = new HttpsAgent({
  maxSockets: 1,
  maxKeepAliveRequests: 0, // no limit on max requests per keepalive socket
  maxKeepAliveTime: 30000, // keepalive for 30 seconds
});
const Base = require('./Base.js');

class AddSynonymsScript extends Base {
  constructor() {
    super();
    // Bind class methods
    this.getSource = this.getSource.bind(this);
    this.parseBatchSynonymsOptions = this.parseBatchSynonymsOptions.bind(this);
    this.convertCsvToJson = this.convertCsvToJson.bind(this);
    this.start = this.start.bind(this);
    // Define validation constants
    this.message =

const fs = require('fs');
const path = require('path');
const algolia = require('algoliasearch');
const HttpsAgent = require('agentkeepalive').HttpsAgent;
const keepaliveAgent = new HttpsAgent({
  maxSockets: 1,
  maxKeepAliveRequests: 0, // no limit on max requests per keepalive socket
  maxKeepAliveTime: 30000, // keepalive for 30 seconds
});
const Base = require('./Base.js');

class SearchScript extends Base {
  constructor() {
    super();
    // Bind class methods
    this.start = this.start.bind(this);
    this.parseSearchOptions = this.parseSearchOptions.bind(this);
    this.writeOutput = this.writeOutput.bind(this);
    // Define validation constants
    this.message =
      '\nExample: $ algolia search -a algoliaappid -k algoliaapikey -n algoliaindexname -q query -p searchparams -o outputpath\n\n';

var HttpAgent = require('agentkeepalive');
  var semver = require('semver');

  var keepAliveAgent;

  // node 0.10 => agentkeepalive
  // node >= 0.12 => native keepalive
  // iojs => native keepalive
  // node >= 0.11.4 has good keepAlive https://github.com/joyent/node/commit/b5b841
  if (semver.satisfies(process.version, '<0.11.4')) {
    if (protocol === 'http:') {
      keepAliveAgent = new HttpAgent({
        maxSockets: Infinity
      });
    } else if (protocol === 'https:') {
      keepAliveAgent = new HttpsAgent({
        maxSockets: Infinity
      });
    }
  } else if (protocol === 'http:') {
    keepAliveAgent = new http.Agent({
      keepAlive: true,
      maxSockets: Infinity
    });
  } else if (protocol === 'https:') {
    keepAliveAgent = new https.Agent({
      keepAlive: true,
      maxSockets: Infinity
    });
  }

  return keepAliveAgent;

module.exports = function(config, done) {
    var log = config.log || console.log;

    if (!config.source || !config.source.bucket || !config.source.prefix)
        return done(new Error('Must provide source bucket and prefix to snapshot'));

    if (!config.destination || !config.destination.bucket || !config.destination.key)
        return done(new Error('Must provide destination bucket and key where the snapshot will be put'));

    var s3Options = {
        httpOptions: {
            timeout: 1000,
            agent: new AgentKeepAlive.HttpsAgent({
                keepAlive: true,
                maxSockets: 256,
                keepAliveTimeout: 60000
            })
        }
    };
    if (config.maxRetries) s3Options.maxRetries = config.maxRetries;
    if (config.logger) s3Options.logger = config.logger;

    var s3 = new AWS.S3(s3Options);

    var size = 0;
    var uri = ['s3:/', config.source.bucket, config.source.prefix].join('/');
    var partsLoaded = -1;

    var objStream = s3scan.Scan(uri, { s3: s3 })

var onTimeout = require('./_timeout_listener');
var url = require('url');
var Agent = require('agentkeepalive');

var _ENV = process.env;
var _MAX_SOCKETS = parseInt(_ENV.NODE_MAX_SOCKETS, 10) || Infinity;
var _SOCKET_TIMEOUT = parseInt(_ENV.NODE_SOCKET_TIMEOUT, 10) || 15 * 1000;

var _AGENT_OPTIONS = {
  keepAlive: true,
  maxSockets: _MAX_SOCKETS,
  timeout: _SOCKET_TIMEOUT
};

var httpAgent = new Agent(_AGENT_OPTIONS);
var httpsAgent = new Agent.HttpsAgent(_AGENT_OPTIONS);

/**
 * Request data over HTTP/s
 *
 * Supported option properties:
 * - http://nodejs.org/api/http.html#http_http_request_options_callback
 * - secure {Boolean}: enable secure communication over HTTPS, default: false
 * - timeout {Number}: request socket timeout in milliseconds, default: 15000
 * - data {Buffer|String}: data to write to the request, default: undefined
 *
 * @param {Object} options
 * @returns {Promise~Response}
 */
module.exports = function request(options) {
  options = typeof options === 'string' ? url.parse(options) : options || {};
  options.secure = (/https:/).test(options.protocol) ? true : options.secure;

const destroy = require('destroy');
const HttpAgent = require('agentkeepalive');
const HttpsAgent = require('agentkeepalive').HttpsAgent;
const utils = require('./utils');
const cnpmConfig = require('./cnpm_config');
const urlParser = require('url');

module.exports = get;

const httpKeepaliveAgent = new HttpAgent({
  keepAlive: true,
  keepAliveMsecs: 30000,
  maxSockets: 10,
  maxFreeSockets: 10,
});
const httpsKeepaliveAgent = new HttpsAgent({
  keepAlive: true,
  keepAliveMsecs: 30000,
  maxSockets: 10,
  maxFreeSockets: 10,
});

const USER_AGENT = 'npminstall/' + require('../package.json').version + ' ' + urllib.USER_AGENT;
const MAX_RETRY = 5;

async function get(url, options, globalOptions) {
  options.httpsAgent = httpsKeepaliveAgent;
  options.agent = httpKeepaliveAgent;
  options.headers = options.headers || {};
  options.headers['User-Agent'] = USER_AGENT;
  if (globalOptions) {
    options.rejectUnauthorized = globalOptions.strictSSL;

});
    httpsAgent = tunnel.httpsOverHttps({
      proxy: {
        host: urlinfo.hostname,
        port: urlinfo.port
      }
    });
  } else {
    throw new TypeError('httpProxy format error: ' + config.httpProxy);
  }
} else {
  httpAgent = new HttpAgent({
    timeout: 0,
    keepAliveTimeout: 15000
  });
  httpsAgent = new HttpsAgent({
    timeout: 0,
    keepAliveTimeout: 15000
  });
}

var client = urllib.create({
  agent: httpAgent,
  httpsAgent: httpsAgent
});

module.exports = client;
module.exports.USER_AGENT = urllib.USER_AGENT;

createNodeAgent: function (connection, config) {
          if (connection.useSsl) {
            return new AgentKeepAliveHttps(connection.makeAgentConfig(config));
          }
          return new AgentKeepAlive(connection.makeAgentConfig(config));
        }