Tracking cookie for hapi

trackingCookie.js

var uuid = require("node-uuid");
var TRACKING_COOKIE_NAME = "trackingId";
var UUID_REGEX = /^[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}$/;

module.exports.register = function (server) {

	server.state(TRACKING_COOKIE_NAME, {
		ttl: 2 * 365 * 86400 * 1000,
		path: "/"
	});

	server.ext("onPreHandler", function (req, next) {
		if (!req.state[TRACKING_COOKIE_NAME] || !UUID_REGEX.test(req.state[TRACKING_COOKIE_NAME])) {
			req.state[TRACKING_COOKIE_NAME] = uuid.v4();
		}
		next();
	});

	server.ext("onPreResponse", function (req, next) {

		if (req.response.isBoom) {
			next();
			return;
		}

		req.response.state(TRACKING_COOKIE_NAME, req.state[TRACKING_COOKIE_NAME]);
		next();

	});

};