AngularJS：将服务注入HTTP拦截器（循环依赖）

Z时代
2024-01-10
分类：问答

我正在尝试为AngularJS应用编写HTTP拦截器以处理身份验证。

这段代码有效，但是我担心手动注入服务，因为我认为Angular应该自动处理此问题：

    app.config(['$httpProvider', function ($httpProvider) {
    $httpProvider.interceptors.push(function ($location, $injector) {
        return {
            'request': function (config) {
                //injected manually to get around circular dependency problem.
                var AuthService = $injector.get('AuthService');
                console.log(AuthService);
                console.log('in request interceptor');
                if (!AuthService.isAuthenticated() && $location.path != '/login') {
                    console.log('user is not logged in.');
                    $location.path('/login');
                }
                return config;
            }
        };
    })
}]);

我刚开始做的事情，但是遇到了循环依赖问题：

    app.config(function ($provide, $httpProvider) {
    $provide.factory('HttpInterceptor', function ($q, $location, AuthService) {
        return {
            'request': function (config) {
                console.log('in request interceptor.');
                if (!AuthService.isAuthenticated() && $location.path != '/login') {
                    console.log('user is not logged in.');
                    $location.path('/login');
                }
                return config;
            }
        };
    });
    $httpProvider.interceptors.push('HttpInterceptor');
});

我担心的另一个原因是Angular Docs中$

http上的部分似乎显示了一种将依赖项注入“常规方式”到Http拦截器中的方法。请参阅“拦截器”下的代码段：

// register the interceptor as a service
$provide.factory('myHttpInterceptor', function($q, dependency1, dependency2) {
  return {
    // optional method
    'request': function(config) {
      // do something on success
      return config || $q.when(config);
    },
    // optional method
   'requestError': function(rejection) {
      // do something on error
      if (canRecover(rejection)) {
        return responseOrNewPromise
      }
      return $q.reject(rejection);
    },
    // optional method
    'response': function(response) {
      // do something on success
      return response || $q.when(response);
    },
    // optional method
   'responseError': function(rejection) {
      // do something on error
      if (canRecover(rejection)) {
        return responseOrNewPromise
      }
      return $q.reject(rejection);
    };
  }
});
$httpProvider.interceptors.push('myHttpInterceptor');