binaryXhr.js

$.ajaxSettings.xhr = (function() {
  var xhrFactory = $.ajaxSettings.xhr();
  
  return function() {
    var xhr = xhrFactory();
    var send = xhr.send;
    xhr.send = function() {
       var onload = xhr.onload;
       xhr.onload = function() {
        if ((xhr.responseType || 'text' ) !== 'text') {
          xhr.responseText = undefined;
        }
           
        return onload.apply(this, arguments);
       };
       
       return send.apply(this, arguments);
    };
    return xhr;
  };
}());