websockets.bookmarket.js

javascript:
(function() {
  WebSocket.sockets || (WebSocket.sockets = []);
  var s = WebSocket.prototype.send;
  WebSocket.prototype.send = function(data) {
    if (!this._oh) {
      this._oh = 1;
      WebSocket.sockets.push(this);
      this.addEventListener('message', function(e) {
        console.log('receive', e.data);
      });
    }
    console.log('send', data);
    return s.apply(this, arguments);
  };
})();
void(0);