提问



我正在编写一个具有登录视图和主视图的小型AngularJS应用程序,配置如下:


$routeProvider
 .when('/main' , {templateUrl: 'partials/main.html',  controller: MainController})
 .when('/login', {templateUrl: 'partials/login.html', controller: LoginController})
 .otherwise({redirectTo: '/login'});


我的LoginController检查用户/传递组合并在$ rootScope上设置一个反映这个的属性:


function LoginController($scope, $location, $rootScope) {
 $scope.attemptLogin = function() {
   if ( $scope.username == $scope.password ) { // test
        $rootScope.loggedUser = $scope.username;
        $location.path( "/main" );
    } else {
        $scope.loginError = "Invalid user/pass.";
    }
}


一切正常,但如果我访问http://localhost/#/main,我最终会绕过登录界面。我想写一些类似每当路由改变时,如果$ rootScope.loggedUser为null然后重定向到/login


...


......等一下我能以某种方式听路线变化吗?无论如何我会发布这个问题并继续寻找。

最佳参考


经过一些文档和源代码的深入探讨后,我想我已经开始工作了。也许这会对其他人有用吗?


我在模块配置中添加了以下内容:


angular.module(...)
 .config( ['$routeProvider', function($routeProvider) {...}] )
 .run( function($rootScope, $location) {

    // register listener to watch route changes
    $rootScope.$on( "$routeChangeStart", function(event, next, current) {
      if ( $rootScope.loggedUser == null ) {
        // no logged user, we should be going to #login
        if ( next.templateUrl == "partials/login.html" ) {
          // already going to #login, no redirect needed
        } else {
          // not going to #login, we should redirect now
          $location.path( "/login" );
        }
      }         
    });
 })


奇怪的是,我必须测试部分名称(login.html)因为下一个Route对象没有url或其他东西。也许有更好的方法?

其它参考1


这可能是一个更优雅和灵活的解决方案,具有解析配置属性和承诺,可根据数据在路由和路由规则上实现最终数据加载。


您在路由配置中的解析中指定了一个函数,在函数加载和检查数据中,执行所有重定向。如果您需要加载数据,则返回一个承诺,如果您需要重定向 - 在此之前拒绝承诺。
所有细节都可以在$ routerProvider和$ q文档页面上找到。[35] [36]


'use strict';

var app = angular.module('app', [])
    .config(['$routeProvider', function($routeProvider) {
        $routeProvider
            .when('/', {
                templateUrl: "login.html",
                controller: LoginController
            })
            .when('/private', {
                templateUrl: "private.html",
                controller: PrivateController,
                resolve: {
                    factory: checkRouting
                }
            })
            .when('/private/anotherpage', {
                templateUrl:"another-private.html",
                controller: AnotherPriveController,
                resolve: {
                    factory: checkRouting
                }
            })
            .otherwise({ redirectTo: '/' });
    }]);

var checkRouting= function ($q, $rootScope, $location) {
    if ($rootScope.userProfile) {
        return true;
    } else {
        var deferred = $q.defer();
        $http.post("/loadUserProfile", { userToken: "blah" })
            .success(function (response) {
                $rootScope.userProfile = response.userProfile;
                deferred.resolve(true);
            })
            .error(function () {
                deferred.reject();
                $location.path("/");
             });
        return deferred.promise;
    }
};


对于讲俄语的人来说,有一篇关于AngularJS的帖子Вариантусловногораутинга。[37]

其它参考2


我一直在努力做同样的事情。在与同事合作之后提出了另一个更简单的解决方案。我在$location.path()上设置了一块手表。这就是诀窍。我刚开始学习AngularJS,发现它更清晰,更易读。


$scope.$watch(function() { return $location.path(); }, function(newValue, oldValue){  
    if ($scope.loggedIn == false && newValue != '/login'){  
            $location.path('/login');  
    }  
});

其它参考3


实现登录重定向的另一种方法是使用此处描述的事件和拦截器。本文介绍了一些其他优点,例如检测何时需要登录,对请求进行排队,以及在登录成功后重播它们。[38]


您可以在这里试用一个有效的演示并在这里查看演示源。[39] [40]

其它参考4


1。设置全局当前用户。



在身份验证服务中,在根范围上设置当前经过身份验证的用户。


// AuthService.js

  // auth successful
  $rootScope.user = user


2。在每个受保护的路由上设置auth功能。



// AdminController.js

.config(function ($routeProvider) {
  $routeProvider.when('/admin', {
    controller: 'AdminController',
    auth: function (user) {
      return user && user.isAdmin
    }
  })
})


3。检查每次路线更改时的身份验证。



// index.js

.run(function ($rootScope, $location) {
  $rootScope.$on('$routeChangeStart', function (ev, next, curr) {
    if (next.$$route) {
      var user = $rootScope.user
      var auth = next.$$route.auth
      if (auth && !auth(user)) { $location.path('/') }
    }
  })
})


或者,您可以设置用户对象的权限并为每个路由分配权限,然后检查事件回调中的权限。

其它参考5


这就是我如何做到的,万一它可以帮助任何人:


在配置中,我在我希望向公众开放的几条路线上设置publicAccess属性(如登录或注册):


$routeProvider
    .when('/', {
        templateUrl: 'views/home.html',
        controller: 'HomeCtrl'
    })
    .when('/login', {
        templateUrl: 'views/login.html',
        controller: 'LoginCtrl',
        publicAccess: true
    })


然后在运行块中,我在$routeChangeStart事件上设置一个监听器,重定向到'/login',除非用户有权访问或路由是公共可访问的:


angular.module('myModule').run(function($rootScope, $location, user, $route) {

    var routesOpenToPublic = [];
    angular.forEach($route.routes, function(route, path) {
        // push route onto routesOpenToPublic if it has a truthy publicAccess value
        route.publicAccess && (routesOpenToPublic.push(path));
    });

    $rootScope.$on('$routeChangeStart', function(event, nextLoc, currentLoc) {
        var closedToPublic = (-1 === routesOpenToPublic.indexOf($location.path()));
        if(closedToPublic && !user.isLoggedIn()) {
            $location.path('/login');
        }
    });
})


您显然可以将条件从isLoggedIn更改为其他任何内容......只是显示另一种方法。

其它参考6


我正在使用拦截器。我创建了一个库文件,可以添加到index.html文件中。这样你就可以对你的其他服务调用进行全局错误处理,而不必单独关心所有错误进一步向下我还粘贴了我的基本身份验证登录库。在那里你可以看到我也检查401错误并重定向到另一个位置。参见lib/ea-basic-auth-login.js


LIB/HTTP的误差handling.js


/**
* @ngdoc overview
* @name http-error-handling
* @description
*
* Module that provides http error handling for apps.
*
* Usage:
* Hook the file in to your index.html: <script src="lib/http-error-handling.js"></script>
* Add <div class="messagesList" app-messages></div> to the index.html at the position you want to
* display the error messages.
*/
(function() {
'use strict';
angular.module('http-error-handling', [])
    .config(function($provide, $httpProvider, $compileProvider) {
        var elementsList = $();

        var showMessage = function(content, cl, time) {
            $('<div/>')
                .addClass(cl)
                .hide()
                .fadeIn('fast')
                .delay(time)
                .fadeOut('fast', function() { $(this).remove(); })
                .appendTo(elementsList)
                .text(content);
        };

        $httpProvider.responseInterceptors.push(function($timeout, $q) {
            return function(promise) {
                return promise.then(function(successResponse) {
                    if (successResponse.config.method.toUpperCase() != 'GET')
                        showMessage('Success', 'http-success-message', 5000);
                    return successResponse;

                }, function(errorResponse) {
                    switch (errorResponse.status) {
                        case 400:
                            showMessage(errorResponse.data.message, 'http-error-message', 6000);
                                }
                            }
                            break;
                        case 401:
                            showMessage('Wrong email or password', 'http-error-message', 6000);
                            break;
                        case 403:
                            showMessage('You don\'t have the right to do this', 'http-error-message', 6000);
                            break;
                        case 500:
                            showMessage('Server internal error: ' + errorResponse.data.message, 'http-error-message', 6000);
                            break;
                        default:
                            showMessage('Error ' + errorResponse.status + ': ' + errorResponse.data.message, 'http-error-message', 6000);
                    }
                    return $q.reject(errorResponse);
                });
            };
        });

        $compileProvider.directive('httpErrorMessages', function() {
            return {
                link: function(scope, element, attrs) {
                    elementsList.push($(element));
                }
            };
        });
    });
})();


CSS/HTTP的误差handling.css


.http-error-message {
    background-color: #fbbcb1;
    border: 1px #e92d0c solid;
    font-size: 12px;
    font-family: arial;
    padding: 10px;
    width: 702px;
    margin-bottom: 1px;
}

.http-error-validation-message {
    background-color: #fbbcb1;
    border: 1px #e92d0c solid;
    font-size: 12px;
    font-family: arial;
    padding: 10px;
    width: 702px;
    margin-bottom: 1px;
}

http-success-message {
    background-color: #adfa9e;
    border: 1px #25ae09 solid;
    font-size: 12px;
    font-family: arial;
    padding: 10px;
    width: 702px;
    margin-bottom: 1px;
}


的index.html


<!doctype html>
<html lang="en" ng-app="cc">
    <head>
        <meta charset="utf-8">
        <title>yourapp</title>
        <link rel="stylesheet" href="css/http-error-handling.css"/>
    </head>
    <body>

<!-- Display top tab menu -->
<ul class="menu">
  <li><a href="#/user">Users</a></li>
  <li><a href="#/vendor">Vendors</a></li>
  <li><logout-link/></li>
</ul>

<!-- Display errors -->
<div class="http-error-messages" http-error-messages></div>

<!-- Display partial pages -->
<div ng-view></div>

<!-- Include all the js files. In production use min.js should be used -->
<script src="lib/angular114/angular.js"></script>
<script src="lib/angular114/angular-resource.js"></script>
<script src="lib/http-error-handling.js"></script>
<script src="js/app.js"></script>
<script src="js/services.js"></script>
<script src="js/controllers.js"></script>
<script src="js/filters.js"></script>






LIB/EA-基本-AUTH-login.js


登录几乎完全相同。在这里,您可以获得重定向的答案($ location.path(/login))。


/**
* @ngdoc overview
* @name ea-basic-auth-login
* @description
*
* Module that provides http basic authentication for apps.
*
* Usage:
* Hook the file in to your index.html: <script src="lib/ea-basic-auth-login.js">  </script>
* Place <ea-login-form/> tag in to your html login page
* Place <ea-logout-link/> tag in to your html page where the user has to click to logout
*/
(function() {
'use strict';
angular.module('ea-basic-auth-login', ['ea-base64-login'])
    .config(['$httpProvider', function ($httpProvider) {
        var ea_basic_auth_login_interceptor = ['$location', '$q', function($location, $q) {
            function success(response) {
                return response;
            }

            function error(response) {
                if(response.status === 401) {
                    $location.path('/login');
                    return $q.reject(response);
                }
                else {
                    return $q.reject(response);
                }
            }

            return function(promise) {
                return promise.then(success, error);
            }
        }];
        $httpProvider.responseInterceptors.push(ea_basic_auth_login_interceptor);
    }])
    .controller('EALoginCtrl', ['$scope','$http','$location','EABase64Login', function($scope, $http, $location, EABase64Login) {
        $scope.login = function() {
            $http.defaults.headers.common['Authorization'] = 'Basic ' + EABase64Login.encode($scope.email + ':' + $scope.password);
            $location.path("/user");
        };

        $scope.logout = function() {
            $http.defaults.headers.common['Authorization'] = undefined;
            $location.path("/login");
        };
    }])
    .directive('eaLoginForm', [function() {
        return {
            restrict:   'E',
            template:   '<div id="ea_login_container" ng-controller="EALoginCtrl">' +
                        '<form id="ea_login_form" name="ea_login_form" novalidate>' +
                        '<input id="ea_login_email_field" class="ea_login_field" type="text" name="email" ng-model="email" placeholder="E-Mail"/>' +
                        '<br/>' +
                        '<input id="ea_login_password_field" class="ea_login_field" type="password" name="password" ng-model="password" placeholder="Password"/>' +
                        '<br/>' +
                        '<button class="ea_login_button" ng-click="login()">Login</button>' +
                        '</form>' +
                        '</div>',
            replace: true
        };
    }])
    .directive('eaLogoutLink', [function() {
        return {
            restrict: 'E',
            template: '<a id="ea-logout-link" ng-controller="EALoginCtrl" ng-click="logout()">Logout</a>',
            replace: true
        }
    }]);

angular.module('ea-base64-login', []).
    factory('EABase64Login', function() {
        var keyStr = 'ABCDEFGHIJKLMNOP' +
            'QRSTUVWXYZabcdef' +
            'ghijklmnopqrstuv' +
            'wxyz0123456789+/' +
            '=';

        return {
            encode: function (input) {
                var output = "";
                var chr1, chr2, chr3 = "";
                var enc1, enc2, enc3, enc4 = "";
                var i = 0;

                do {
                    chr1 = input.charCodeAt(i++);
                    chr2 = input.charCodeAt(i++);
                    chr3 = input.charCodeAt(i++);

                    enc1 = chr1 >> 2;
                    enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
                    enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
                    enc4 = chr3 & 63;

                    if (isNaN(chr2)) {
                        enc3 = enc4 = 64;
                    } else if (isNaN(chr3)) {
                        enc4 = 64;
                    }

                    output = output +
                        keyStr.charAt(enc1) +
                        keyStr.charAt(enc2) +
                        keyStr.charAt(enc3) +
                        keyStr.charAt(enc4);
                    chr1 = chr2 = chr3 = "";
                    enc1 = enc2 = enc3 = enc4 = "";
                } while (i < input.length);

                return output;
            },

            decode: function (input) {
                var output = "";
                var chr1, chr2, chr3 = "";
                var enc1, enc2, enc3, enc4 = "";
                var i = 0;

                // remove all characters that are not A-Z, a-z, 0-9, +, /, or =
                var base64test = /[^A-Za-z0-9\+\/\=]/g;
                if (base64test.exec(input)) {
                    alert("There were invalid base64 characters in the input text.\n" +
                        "Valid base64 characters are A-Z, a-z, 0-9, '+', '/',and '='\n" +
                        "Expect errors in decoding.");
                }
                input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

                do {
                    enc1 = keyStr.indexOf(input.charAt(i++));
                    enc2 = keyStr.indexOf(input.charAt(i++));
                    enc3 = keyStr.indexOf(input.charAt(i++));
                    enc4 = keyStr.indexOf(input.charAt(i++));

                    chr1 = (enc1 << 2) | (enc2 >> 4);
                    chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
                    chr3 = ((enc3 & 3) << 6) | enc4;

                    output = output + String.fromCharCode(chr1);

                    if (enc3 != 64) {
                        output = output + String.fromCharCode(chr2);
                    }
                    if (enc4 != 64) {
                        output = output + String.fromCharCode(chr3);
                    }

                    chr1 = chr2 = chr3 = "";
                    enc1 = enc2 = enc3 = enc4 = "";

                } while (i < input.length);

                return output;
            }
        };
    });
})();

其它参考7


在你的app.js文件中:


.run(["$rootScope", "$state", function($rootScope, $state) {

      $rootScope.$on('$locationChangeStart', function(event, next, current) {
        if (!$rootScope.loggedUser == null) {
          $state.go('home');
        }    
      });
}])

其它参考8


可以使用angular-ui-router重定向到另一个视图。为此,我们有方法$state.go("target_view")。例如:[41]


 ---- app.js -----

 var app = angular.module('myApp', ['ui.router']);

 app.config(function ($stateProvider, $urlRouterProvider) {

    // Otherwise
    $urlRouterProvider.otherwise("/");

    $stateProvider
            // Index will decide if redirects to Login or Dashboard view
            .state("index", {
                 url: ""
                 controller: 'index_controller'
              })
            .state('dashboard', {
                url: "/dashboard",
                controller: 'dashboard_controller',
                templateUrl: "views/dashboard.html"
              })
            .state('login', {
                url: "/login",
                controller: 'login_controller',
                templateUrl: "views/login.html"
              });
 });

 // Associate the $state variable with $rootScope in order to use it with any controller
 app.run(function ($rootScope, $state, $stateParams) {
        $rootScope.$state = $state;
        $rootScope.$stateParams = $stateParams;
    });

 app.controller('index_controller', function ($scope, $log) {

    /* Check if the user is logged prior to use the next code */

    if (!isLoggedUser) {
        $log.log("user not logged, redirecting to Login view");
        // Redirect to Login view 
        $scope.$state.go("login");
    } else {
        // Redirect to dashboard view 
        $scope.$state.go("dashboard");
    }

 });

----- HTML -----

<!DOCTYPE html>
<html>
    <head>
        <title>My WebSite</title>

        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
        <meta name="description" content="MyContent">
        <meta name="viewport" content="width=device-width, initial-scale=1">

        <script src="js/libs/angular.min.js" type="text/javascript"></script>
        <script src="js/libs/angular-ui-router.min.js" type="text/javascript"></script>
        <script src="js/app.js" type="text/javascript"></script>

    </head>
    <body ng-app="myApp">
        <div ui-view></div>
    </body>
</html>

其它参考9


如果您不想使用angular-ui-router,但希望通过RequireJS延迟加载控制器,那么当您将控制器用作RequireJS模块(延迟加载)时,事件$routeChangeStart会出现几个问题。


您无法确定在$routeChangeStart被触发之前是否会加载控制器 - 事实上它不会被加载。这意味着您无法访问locals路由的属性,如locals$$route,因为它们尚未设置。

例:


app.config(["$routeProvider", function($routeProvider) {
    $routeProvider.when("/foo", {
        controller: "Foo",
        resolve: {
            controller: ["$q", function($q) {
                var deferred = $q.defer();
                require(["path/to/controller/Foo"], function(Foo) {
                    // now controller is loaded
                    deferred.resolve();
                });
                return deferred.promise;
            }]
        }
    });
}]);

app.run(["$rootScope", function($rootScope) {
    $rootScope.$on("$routeChangeStart", function(event, next, current) {
        console.log(next.$$route, next.locals); // undefined, undefined
    });
}]);


这意味着您无法检查其中的访问权限。


解决方案:


由于通过解析完成控制器的加载,您可以对访问控制检查执行相同的操作:


app.config(["$routeProvider", function($routeProvider) {
    $routeProvider.when("/foo", {
        controller: "Foo",
        resolve: {
            controller: ["$q", function($q) {
                var deferred = $q.defer();
                require(["path/to/controller/Foo"], function(Foo) {
                    // now controller is loaded
                    deferred.resolve();
                });
                return deferred.promise;
            }],
            access: ["$q", function($q) {
                var deferred = $q.defer();
                if (/* some logic to determine access is granted */) {
                    deferred.resolve();
                } else {
                    deferred.reject("You have no access rights to go there");
                }
                return deferred.promise;
            }],
        }
    });
}]);

app.run(["$rootScope", function($rootScope) {
    $rootScope.$on("$routeChangeError", function(event, next, current, error) {
        console.log("Error: " + error); // "Error: You have no access rights to go there"
    });
}]);


请注意,这不是使用事件$routeChangeStart而是使用$routeChangeError

其它参考10


    $routeProvider
 .when('/main' , {templateUrl: 'partials/main.html',  controller: MainController})
 .when('/login', {templateUrl: 'partials/login.html', controller: LoginController}).
 .when('/login', {templateUrl: 'partials/index.html', controller: IndexController})
 .otherwise({redirectTo: '/index'});