http://blog.fgribreau.com/2012/05/how-to-fix-could-not-decode-text-frame.html

fix.js

/*
 * Fix the "Could not decode a text frame as UTF-8." bug #socket.io #nodejs #websocket
 *
 * Usage:
 *   cleanedString = filterUnicode(maybeHarmfulString);
 *
 * Original work-around from SockJS: https://github.com/sockjs/sockjs-node/commit/e0e7113f0f8bd8e5fea25e1eb2a8b1fe1413da2c
 * Other work-around: https://gist.github.com/2024272
 * 
 */

var escapable = /[\x00-\x1f\ud800-\udfff\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufff0-\uffff]/g;

function filterUnicode(quoted){

  escapable.lastIndex = 0;
  if( !escapable.test(quoted)) return quoted;

  return quoted.replace( escapable, function(a){
    return '';
  });
}