let authToken = null;

function getToken() {
    return authToken;
}

function urlBase64ToUint8Array(base64String) {
    const padding = "=".repeat((4 - (base64String.length % 4)) % 4);
    const base64 = (base64String + padding)
        .replace(/\-/g, "+")
        .replace(/_/g, "/");

    const rawData = atob(base64);
    const outputArray = new Uint8Array(rawData.length);

    for (let i = 0; i < rawData.length; i++) {
        outputArray[i] = rawData.charCodeAt(i);
    }

    return outputArray;
}

let proxied = window.XMLHttpRequest.prototype.setRequestHeader;
window.XMLHttpRequest.prototype.setRequestHeader = function() {
	if (arguments[0] === "Authorization") {
		authToken = arguments[1];
	}
	return proxied.apply(this, [].slice.call(arguments));
};