An authorization interceptor for AngularJS. This relies on an authorization service, and will send JWT headers with every request. If a 401 error is encountered, the user is redirected to the login page.

authInterceptor.js

app.factory('authInterceptor', ['$q', '$location', 'authService', function ($q, $location, authService) {
            return {
                request: function (config) {
                    config.headers = config.headers || {};
                    if (authService.isAuthed()) {
                        config.headers.Authorization = 'Bearer ' + authService.getToken();
                    }
                    return config;
                },
                response: function (response) {
                    if (response.status === 401) {

                        // handle the case where the user is not authenticated
                        $location.path("/login");
                    }
                    return response || $q.when(response);
                }, responseError: function (response) {
                        if (response.status === 401) {
                            $location.path("/login");
            
                        }
                        return $q.reject(response);
                    }
            };
        }]);