Function Server

lib/net.js:1990–2049

(options, connectionListener)

}

function Server(options, connectionListener) {
  if (!(this instanceof Server))
    return new Server(options, connectionListener);

  EventEmitter.call(this);

  if (typeof options === 'function') {
    connectionListener = options;
    options = kEmptyObject;
    this.on('connection', connectionListener);
  } else if (options == null || typeof options === 'object') {
    options = { ...options };

    if (typeof connectionListener === 'function') {
      this.on('connection', connectionListener);
    }
  } else {
    throw new ERR_INVALID_ARG_TYPE('options', 'Object', options);
  }
  if (options.keepAliveInitialDelay !== undefined) {
    validateNumber(
      options.keepAliveInitialDelay, 'options.keepAliveInitialDelay',
    );

    if (options.keepAliveInitialDelay < 0) {
      options.keepAliveInitialDelay = 0;
    }
  }
  if (options.highWaterMark !== undefined) {
    validateNumber(
      options.highWaterMark, 'options.highWaterMark',
    );

    if (options.highWaterMark < 0) {
      options.highWaterMark = getDefaultHighWaterMark();
    }
  }

  this._connections = 0;

  this[async_id_symbol] = -1;
  this._handle = null;
  this._usingWorkers = false;
  this._workers = [];
  this._unref = false;
  this._listeningId = 1;

  this.allowHalfOpen = options.allowHalfOpen || false;
  this.pauseOnConnect = !!options.pauseOnConnect;
  this.noDelay = Boolean(options.noDelay);
  this.keepAlive = Boolean(options.keepAlive);
  this.keepAliveInitialDelay = ~~(options.keepAliveInitialDelay / 1000);
  this.highWaterMark = options.highWaterMark ?? getDefaultHighWaterMark();
  if (options.blockList) {
    if (!module.exports.BlockList.isBlockList(options.blockList)) {
      throw new ERR_INVALID_ARG_TYPE('options.blockList', 'net.BlockList', options.blockList);
    }
    this.blockList = options.blockList;