Question

我试图阻止所有ui-router状态更改，直到我对用户进行身份验证：

$rootScope.$on('$stateChangeStart', function (event, next, toParams) {
  if (!authenticated) {
    event.preventDefault()
    //following $timeout is emulating a backend $http.get('/auth/') request
    $timeout(function() {
      authenticated = true
      $state.go(next,toParams)
    },1000)
  }
})

我拒绝所有状态更改，直到用户通过身份验证，但如果我转到使用otherwise()配置的无效网址，我会收到一个带有消息的无限循环：

Error: [$rootScope:infdig] 10 $digest() iterations reached. Aborting!
Watchers fired in the last 5 iterations: [["fn: $locationWatch; newVal: 7; oldVal: 6"],["fn: $locationWatch; newVal: 8; oldVal: 7"],["fn: $locationWatch; newVal: 9; oldVal: 8"],["fn: $locationWatch; newVal: 10; oldVal: 9"],["fn: $locationWatch; newVal: 11; oldVal: 10"]]

以下是我的SSCCE。通过python -m SimpleHTTPServer 7070提供服务，然后转到localhost:7070/test.html#/bar，看到它在你脸上爆炸。而直接导航到唯一有效的angularjs位置并不会导致localhost:7070/test.html#/foo：

<!doctype html>
  <head>
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.js"></script>
    <script src="//ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular.js"></script>
    <script src="//cdnjs.cloudflare.com/ajax/libs/angular-ui-router/0.2.10/angular-ui-router.min.js"></script>
  </head>
  <body ng-app="clientApp">
    <div ui-view="" ></div>

    <script>
      var app = angular.module('clientApp', ['ui.router'])

      var myRouteProvider = [
                '$stateProvider', '$urlRouterProvider',
        function($stateProvider,   $urlRouterProvider) { 
          $urlRouterProvider.otherwise('/foo');
          $stateProvider.state('/foo', {
            url: '/foo',
            template: '<div>In Foo now</div>',
            reloadOnSearch: false
          })
        }]
      app.config(myRouteProvider)

      var authenticated = false
      app.run([
                 '$rootScope', '$log','$state','$timeout',
        function ($rootScope,   $log,  $state,  $timeout) {
          $rootScope.$on('$stateChangeStart', function (event, next, toParams) {
            if (!authenticated) {
              event.preventDefault()
              //following $timeout is emulating a backend $http.get('/auth/') request
              $timeout(function() {
                authenticated = true
                $state.go(next,toParams)
              },1000)
            }
          })
        }
      ])
    </script>
  </body>
</html>

我是否应该使用另一种方法来完成此身份验证阻止？我确实认识到这种身份验证阻止只是客户端。在这个例子中，我没有显示服务器端的东西。

Answer 1

当您使用$ urlRouterProvider.otherwise（“/ foo）与$ stateChangeStart的组合时，看起来这是ui-router的错误。

问题 - https://github.com/angular-ui/ui-router/issues/600

Frank Wallis提供了一个很好的解决方法，使用将函数作为参数的其他方法的更长形式：

$urlRouterProvider.otherwise( function($injector, $location) {
            var $state = $injector.get("$state");
            $state.go("app.home");
        });

好工作弗兰克！

Answer 2

Fakeout。这是$urlRouterProvider和$stateProvider之间的互动问题。我不应该$urlRouterProvider使用otherwise。我应该使用类似的东西：

$stateProvider.state("otherwise", {
    url: "*path",
    template: "Invalid Location",
    controller: [
              '$timeout','$state',
      function($timeout,  $state ) {
        $timeout(function() {
          $state.go('/foo')
        },2000)
      }]
});

甚至是透明的重定向：

$stateProvider.state("otherwise", {
    url: "*path",
    template: "",
    controller: [
              '$state',
      function($state) {
        $state.go('/foo')
      }]
});

现在：

<!doctype html>
  <head>
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.js"></script>
    <script src="//ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular.js"></script>
    <script src="//cdnjs.cloudflare.com/ajax/libs/angular-ui-router/0.2.10/angular-ui-router.min.js"></script>
  </head>
  <body ng-app="clientApp">
    <div ui-view="" ></div>

    <script>
      var app = angular.module('clientApp', ['ui.router'])

      var myRouteProvider = [
                '$stateProvider',
        function($stateProvider) { 

          $stateProvider.state('/foo', {
            url: '/foo',
            template: '<div>In Foo now</div>',
            reloadOnSearch: false
          })

          $stateProvider.state("otherwise", {
              url: "*path",
              template: "",
              controller: [
                        '$state',
                function($state) {
                  $state.go('/foo')
                }]
          });
        }]
      app.config(myRouteProvider)

      var authenticated = false
      app.run([
                 '$rootScope', '$log','$state','$timeout',
        function ($rootScope,   $log,  $state,  $timeout) {
          $rootScope.$on('$stateChangeStart', function (event, next, toParams) {
            if (!authenticated) {
              event.preventDefault()
              //following $timeout is emulating a backend $http.get('/auth/') request
              $timeout(function() {
                authenticated = true
                $state.go(next,toParams)
              },1000)
            }
          })
        }
      ])
    </script>
  </body>
</html>

Answer 3

我也遇到过这个问题。以下是解决方法的代码，其灵感来自angular-permission项目。

主要概念是手动将标志（$$finishAuthorize）添加到状态，并通过此标志打破无限循环。我们需要注意的另一点是{notify: false}的{{1}}选项，并手动广播$state.go事件。

"$stateChangeSuccess"

Answer 4

我也遇到过这个问题。事实证明，他们建议在https://github.com/angular-ui/ui-router/wiki/Frequently-Asked-Questions#how-to-make-a-trailing-slash-optional-for-all-routes

处设置一个尾随斜线的代码

$urlRouterProvider.rule(function ($injector, $location) {
  var path = $location.url();

  console.log(path);
  // check to see if the path already has a slash where it should be
  if (path[path.length - 1] === '/' || path.indexOf('/?') > -1) {
    return;
  }

  if (path.indexOf('?') > -1) {
    return path.replace('?', '/?');
  }

  return path + '/';
});

将此更改为

$urlRouterProvider.rule(function ($injector, $location) {
  var path = $location.url();
  // check to see if the path already has a slash where it should be
  if (path[path.length - 1] === '/' || path.indexOf('/?') > -1) {
    return;
  }
  if (path.indexOf('?') > -1) {
    $location.replace().path(path.replace('?', '/?'));
  }
  $location.replace().path(path + '/');
});

没有返回新路径而只是替换它并没有触发StateChangeStart

Answer 5

尝试将运行块更改为：

    app.run([
             '$rootScope', '$log','$state','$interval',
    function ($rootScope,   $log,  $state,  $interval) {
      var authenticated = false;
      $rootScope.$on('$stateChangeStart', function (event, next, toParams) {
        if (!authenticated) {
          event.preventDefault()
          //following $timeout is emulating a backend $http.get('/auth/') request
        }
      })


      var intervalCanceller = $interval(function() {
        //backend call
        if(call succeeds & user authenticated) {
          authenticated = true;
          $interval.cancel(intervalCanceller);
          $state.go(next, toParams);
        }
      }, 3000);
    }
  ])

Answer 6

我尝试了上述解决方案，取得了不同程度的成功（我正在构建一个Ionic cordova应用程序）。有一次我设法得不到无限循环，状态会改变，但我留下了空白视图。我添加了{ reload:true }，似乎有所帮助。我尝试使用{ notify:false }和{ notify: true }但没有帮助。

我最终使用了大部分答案：https://stackoverflow.com/a/26800804/409864

$rootScope.$on('$stateChangeStart', function (event, toState, toParams, fromState, fromParams) {

  // Do not redirect if going to an error page
  if (toState.name === 'app.error') {
    return;
  }

  // Do not redirect if going to the login page
  if (toState.name === 'app.login') {
    return;
  }

  // Do not redirect if there is a token present in localstorage
  var authData = localstorage.getItem('auth');
  if (authData.token) {
    return;
  }

  // We do not have a token, are not going to the login or error pages, time to redirect!
  event.preventDefault();
  console.debug('No auth credentials in localstorage, redirecting to login page');
  $state.go('engineerApp.home', {}, {reload: true}); // Empty object is params
});

为什么带有ui-router的AngularJS会继续触发$ stateChangeStart事件？

6 个答案: