Function normalizeArgs

lib/net.js:290–323

(args)

// For Server.prototype.listen(), the [...] part is [, backlog]
// but will not be handled here (handled in listen())
function normalizeArgs(args) {
  let arr;

  if (args.length === 0) {
    arr = [{}, null];
    arr[normalizedArgsSymbol] = true;
    return arr;
  }

  const arg0 = args[0];
  let options = {};
  if (typeof arg0 === 'object' && arg0 !== null) {
    // (options[...][, cb])
    options = arg0;
  } else if (isPipeName(arg0)) {
    // (path[...][, cb])
    options.path = arg0;
  } else {
    // ([port][, host][...][, cb])
    options.port = arg0;
    if (args.length > 1 && typeof args[1] === 'string') {
      options.host = args[1];
    }
  }

  const cb = args[args.length - 1];
  if (typeof cb !== 'function')
    arr = [options, null];
  else
    arr = [options, cb];

  arr[normalizedArgsSymbol] = true;
  return arr;
}


// Called when creating new Socket, or when re-using a closed Socket