A custom user identity for the Rebel backoffice
All values are lazy loaded for performance reasons as the constructor is called for every single request
Inheritance: RebelIdentity, IRebelBackOfficeIdentity
        public void Initialize()
        {
            _controller = new DummyController();

            var userData = @"{
                'Id' : '6C50D4C1-B608-4EFA-B488-C95DBC6F9BA6',
                'Roles' : [ 'Editor' ],
                'SessionTimeout' : 60,
                'RealName' : 'Dummy User',
                'StartContentNode' : '',
                'StartMediaNode' : '',
                'AllowedApplications' : [ 'Content', 'Media' ]
            }";

            var ticket = new FormsAuthenticationTicket(1, "DummyUser", DateTime.Now.AddHours(-1), DateTime.Now.AddHours(1), false, userData);
            var identity = new RebelBackOfficeIdentity(ticket);

            var user = Substitute.For<IPrincipal>();
            user.Identity.Returns(identity);

            var httpContext = Substitute.For<HttpContextBase>();
            httpContext.User.Returns(user);

            var routeData = new RouteData();
            var context = new RequestContext(httpContext, routeData);
            var controllerContext = new ControllerContext(context, _controller);

            _controller.ControllerContext = controllerContext;
        }
        /// <summary>
        /// Authenticates the request by reading the FormsAuthentication cookie and setting the
        /// context and thread principle object
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        static void AuthenticateRequest(object sender, EventArgs e)
        {
            var app  = (HttpApplication)sender;
            var http = new HttpContextWrapper(app.Context);

            //we need to determine if the path being requested is an rebel path, if not don't do anything
            var settings            = RebelSettings.GetSettings();
            var backOfficeRoutePath = string.Concat(settings.RebelPaths.BackOfficePath, "/");
            var installerRoutePath  = string.Concat("Install", "/");

            //Retreive Route Url
            var routeUrl  = "";
            var routeData = RouteTable.Routes.GetRouteData(http);

            if (routeData != null)
            {
                var route = routeData.Route as Route;
                if (route != null)
                {
                    routeUrl = route.Url;
                }
            }

            if (routeUrl.StartsWith(installerRoutePath, StringComparison.CurrentCultureIgnoreCase) ||
                routeUrl.StartsWith(backOfficeRoutePath, StringComparison.CurrentCultureIgnoreCase))
            {
                var ticket = http.GetRebelAuthTicket();
                if (ticket != null && !ticket.Expired && http.RenewRebelAuthTicket())
                {
                    //create the Rebel user identity
                    var identity = new RebelBackOfficeIdentity(ticket);

                    //set the principal object
                    var principal = new GenericPrincipal(identity, identity.Roles);

                    app.Context.User        = principal;
                    Thread.CurrentPrincipal = principal;
                }
            }
        }