var start = function (url) {
    var es = new ReconnectingEventSource(url);

    console.log("url: " + url);

    es.onopen = function () {
        console.log('connected');
    };

    es.addEventListener('stream-error', function (e) {
        es.close();
        message = JSON.parse(e.data);
        console.log('stream error: ' + message.condition + ': ' + message.text);
    }, false);

    es.onerror = function (e) {
        console.log('connection error');
    };

    // listening on `message` events and update the corresponding table line.
    // If the status is `FAILED`, we reload the window to ensure a new csrf_token.
    es.addEventListener('message', function (e) {
        message = JSON.parse(e.data);
        console.log("id: " + message.id);
        console.log("status: " + message.status);

        const tr = document.getElementById(message.id);
        if (tr) {
            var status = tr.querySelector("th[name='status']");
            status.innerHTML = message.status;

            var button = tr.querySelector("th[name='deploy']");
            if (message.status == "SUCCESS") {
                button.innerHTML = "";
            }

            if (message.status == "FAILED") {
                window.location.reload();
            }
        }
    }, false);
};