Socket.io Client messaging using Binary Mode

client-binary-mode.js

/**
 * Socket.io => Client => Listener
 */

function onSocketMessage: (channel_id, array_buffer) =>
  // ArrayBuffer => String
  //   http://updates.html5rocks.com/2012/06/How-to-convert-ArrayBuffer-to-and-from-String
  json = String.fromCharCode.apply(null, new Uint8Array(array_buffer));

  try {
    // explicitly decode the String as UTF-8 for Unicode
    //   https://github.com/mathiasbynens/utf8.js
    json = utf8.decode(json)
    data = JSON.parse(json)
  }
  catch (err) {
    // ...
  }

  this.listeners.forEach(function(listener) {
    listener.emit(channel_id, data);
  });
}