AngularJs SPA 注销

AngularJs SPA logout

我在这里发布了更复杂的问题 AngularJs logout action。但我还有另一个方面要看,我认为这应该是分开的问题。

我有带身份验证的 Angualr SPA。使用不记名 JWT 令牌实现的身份验证。我用ng-route来表达不同的看法。让我们想象一下,一个视图(使用 /protected 路由、protecetedControllerprotectedDataService)包含受保护的资源,而另一个视图(使用 /unprotected 路由、unprotecetedControllerunprotectedDataService) 包含不受保护的资源。控制器示例代码:

(function () {
    'use strict';

    angular
        .module('protectedCtrl',[])
        .controller('protectedController', ['$location','protectedDataService', function ($location, protectedDataService) {
            var vm = this;
            vm.title = 'protectedController';
            protectedDataService.getData().then(function (res) {
                vm.values = res.data;
            }, function (err) {
                console.log(err);
            });
        }]);
})();

未受保护的控制器:

(function () {
    'use strict';

    angular
        .module('unprotectedCtrl',[])
        .controller('unprotectedController', ['$location','unprotectedDataService', function ($location, unprotectedDataService) {
            var vm = this;
            vm.title = 'unprotectedController';
            unprotectedDataService.getData().then(function (res) {
                vm.values = res.data;
            }, function (err) {
                console.log(err);
            });
        }]);
})();

如果未登录的用户转到受保护的资源(/protected 路径),他将被重定向到登录页面。但是让我们想象一下,登录用户按下注销按钮(现在我只是从浏览器本地策略中删除我的令牌信息并重新加载页面)。如果用户在 /protected 页面上,他应该被重定向到登录页面。如果他在 /unprotected 页面上,则不会发生任何事情。我该如何实施?如何确定哪个页面在 ng-view 中处于活动状态(是否需要授权)并决定重定向?

您可以使用 $routeChangeStart 事件来捕捉路由的变化和辅助函数来决定是否重定向到登录页面。

在 angular 应用程序的 run 块中,为不需要身份验证的路线定义一个变量,并定义一个函数来检查用户前往的路线是否在此列表中。

angular
  .module('awesomeApp')
  .run(function (/* inject dependencies */) {
    // other code

    // Define a list of routes that follow a specific rule. This example
    // can be extended to provide access based on user permissions by
    // defining other variables that will list routes that require the
    // user to have specific permissions to access those routes.
    var routesThatDoNotRequireAuthentication = ['/unprotected'];

    // Check if current location is contained in the list of given routes.
    // Note: the check here can be made using different criteria. For
    // this example I check whether the route contains one of the
    // available routes, but you can check for starting position, or other criteria.
    function rootIsPresent ( route, availableRoutes ) {
      var routeFound = false;
      for ( var i = 0, l = availableRoutes.length; i < l; i++ ) {
        routeFound = routeFound || route.indexOf(availableRoutes[i]) > -1;
      }
      return routeFound;
    }

    // And now, when the $routeChangeStart event is fired, check whether
    // its safe to let the user change the route.
    $rootScope.$on('$routeChangeStart', function () {
      // Get the authentication status of a user
      var isAuthenticated = authenticationService.isAuthenticated();
      var newRoute = $location.url();

      // If the route requires authentication and the user is not 
      // authenticated, then redirect to login page.
      if ( !rootIsPresent(newRoute, routesThatDoNotRequireAuthentication) && !isAuthenticated ) {
        $location.path('/login');
      }
    });
});

更新

似乎我误解了这个问题并认为你所有的路线都以 /protected/unprotected 为前缀(如果你考虑一下,这真的不是那么聪明大多数情况下都会这样做)。

在这种情况下,您可以在$routeProvider中定义路由时额外设置属性:

$routeProvider
  .when('/awesomePath', {
    templateUrl: 'awesome-template.html',
    controller: 'AwesomeController',
    controllerAs: 'vm',
    requireAuth: true  // add the property that defines a route as protected or unprotected
  })

现在,在您的 $routeChangeStart 处理程序函数中,您检查用户将要前往的路由是否受到保护:

$rootScope.$on('$routeChangeStart', function () {
      // Get the authentication status of a user
      var isAuthenticated = authenticationService.isAuthenticated();
      var newRoute = $location.url();

      // In a controller, $route object has a 'current' property that
      // holds route defined route properties, but here the 'current'
      // property is null, so we need to get the $route object we 
      // need by using the $location.url()
      if ( $route.routes[$location.url()].requireAuth && !isAuthenticated ) {
        $location.path('/login');
      }
    });

因此您无需在任何地方对路线进行硬编码。