uwsgi + harakiri + websockets bug

<html>
<head>
    <script>
        var polling = (function () {
            var poll_error_timeout = 1;
            var default_error_timeout = poll_error_timeout + 0;
            var poll_error_max_timeout = 15;

function pollForEventsWebsockets() {
                var s = new WebSocket('ws://localhost:8000/ws');

var retry = function () {
                    console.log(
                            'retrying websocket connection in ' + poll_error_timeout);
                    setTimeout(pollForEventsWebsockets, poll_error_timeout * 1000);
                    poll_error_timeout = Math.min(
                            poll_error_max_timeout, poll_error_timeout * 2);
                };

s.onopen = function() {
                    console.log("Websocket connected");
                    poll_error_timeout = default_error_timeout;
                };

s.onmessage = function(e) {
                    console.log('Received message', e.data);
                    poll_error_timeout = default_error_timeout;
                };

s.onerror = function(e) {
                    console.error(e);
                };

s.onclose = function(e) {
                    console.log('ws connection closed');
                    retry();
                };
            }
            pollForEventsWebsockets();
            return {}
        }());
    </script>
</head>
<body>

</body>
</html>