Yii2中ACF和RBAC

ACF ( Access Control Filter

ACF ( Access Control Filter)官网的解释就是一个可以在模型或控制器执行行为过滤器,当有用户请求时,ACF将检查access rules (权限规则),在决定是否让这个用户请求这个行为。

在控制器中使用

public function behaviors()
    {
        return [
            'verbs' => [
                'class' => VerbFilter::className(),
                'actions' => [
                    'delete' => ['POST'],
                ],
            ],
            //ACF过滤
            'access' => [
                'class' => AccessControl::className(),
                'rules' => [
                    [
                        //是否云允许 相符合匹配规则 roles 执行这些动作
                        'allow' => true,
                        //可执行的动作
                        'actions' => ['login', 'index', 'error'],
                        ///游客未经认证
                        'roles' => ['?'],
                    ],
                    [
                        'allow' => true,
                        //可执行的动作 
                        'actions' => ['logout', 'index','view','update'],
                    // 已认证用户
                        'roles' => ['@'],
                    ],
                ],
            ]
        ];
    }

当ACF知道当前用户没有权限执行当前动作时,他将执行如下默认行为:

如果用户是游客,将调用 yiiwebUser::loginRequired()跳转到登录页面。

如果用户已经是授权用户,它将抛出异常(yiiwebForbiddenHttpException.)。

同时也可以通过配置yiifiltersAccessControl::$denyCallback属性进行自定义这个行为,如下。

[
    'class' => AccessControl::className(),
    ...
    'denyCallback' => function ($rule, $action) {
        throw new Exception('You are not allowed to access this page');
    }
]

 

同时还支持很多选项,如下列表,也可以扩张 yiifiltersAccessRule来建立自己的自定义权限规则类

allow 指定是否允许或不允许这个规则

actions 动作的匹配规则,值是一个数组,比较是区分大小写。如果这个选项没有设置或为空,那么规则适合所有动作

controllers 指定控制器的匹配规则,值是一个数组

roles 指定匹配的用户角色,有两个角色是公认的,通过yiiwebUser::$isGues进行验证。?匹配未授权用户,@匹配授权用户

ips  用户的IP地址

verbs 指定匹配请求方式(get  or post )

matchCallback 指定一个回调判断规则是否匹配

denyCallback  指定一个回调,当规则不匹配时进行调用

use yiifiltersAccessControl;

class SiteController extends Controller
{
    public function behaviors()
    {
        return [
            'access' => [
                'class' => AccessControl::className(),
                'only' => ['special-callback'],
                'rules' => [
                    [
                        'actions' => ['special-callback'],
                        'allow' => true,
                        'matchCallback' => function ($rule, $action) {
                            return date('d-m') === '31-10';
                        }
                    ],
                ],
            ],
        ];
    }

    // Match callback called! This page can be accessed only each October 31st
    public function actionSpecialCallback()
    {
        return $this->render('happy-halloween');
    }
}

Role Based Access Control (RBAC)——基于角色存取控制权

配置RBAC

Yii提供两种类型的认证管理,即yiirbacPhpManager and yiirbacDbManager,前者用PHP脚本文件存储认证数据,后者用数据库存储认证数据。

Using  PhpManager

在应用配置中添加 yiirbacPhpManager类

return [
    // ...
    'components' => [
        'authManager' => [
            'class' => 'yiirbacPhpManager',
        ],
        // ...
    ],
];

authManager现在能通过 Yii::$app->authManager进行认证

yiirbacPhpManager存储RBAC数据文件默认是在@app/rbac目录下,若果权限结构需要被改动,那要确保这个目录可写

Using  DbManager

在应用配置中添加 yiirbacDbManager类

return [
    // ...
    'components' => [
        'authManager' => [
            'class' => 'yiirbacDbManager',
        ],
        // ...
    ],
];

DbManager会使用四张表存储数据

auth_item      权限表

auth_item_child  权限结构表

auth_assignment 权限分配表

auth_rule   权限规则表

使用 如下命令在@yii/rbac/migrations目录生成文件

yii migrate --migrationPath=@yii/rbac/migrations

建立认证数据

如果权限结构准备好了,如下,那么就可以创建在控制台执行的命令,执行 yii rbac/init  将生成数据

namespace  consolecontrollers;
use Yii;
use yiiconsoleController;

class RbacController extends Controller
{
    public function actionInit()
    {
        $auth = Yii::$app->authManager;
        // 添加 "createPost" 权限
        $createPost = $auth->createPermission('createPost');
        $createPost->description = '新增文章';
        $auth->add($createPost);

        // 添加 "updatePost" 权限
        $updatePost = $auth->createPermission('updatePost');
        $updatePost->description = '修改文章';
        $auth->add($updatePost);

        // 添加 "deletePost" 权限
        $deletePost = $auth->createPermission('deletePost');
        $deletePost->description = '删除文章';
        $auth->add($deletePost);

        // 添加 "approveComment" 权限
        $approveComment = $auth->createPermission('approveComment');
        $approveComment->description = '审核评论';
        $auth->add($approveComment);

        // 添加 "postadmin" 角色并赋予 "updatePost" “deletePost” “createPost”
        $postAdmin = $auth->createRole('postAdmin');
        $postAdmin->description = '文章管理员';
        $auth->add($postAdmin);
        $auth->addChild($postAdmin, $updatePost);
        $auth->addChild($postAdmin, $createPost);
        $auth->addChild($postAdmin, $deletePost);

        // 添加 "postOperator" 角色并赋予  “deletePost”
        $postOperator = $auth->createRole('postOperator');
        $postOperator->description = '文章操作员';
        $auth->add($postOperator);
        $auth->addChild($postOperator, $deletePost);

        // 添加 "commentAuditor" 角色并赋予  “approveComment”
        $commentAuditor = $auth->createRole('commentAuditor');
        $commentAuditor->description = '评论审核员';
        $auth->add($commentAuditor);
        $auth->addChild($commentAuditor, $approveComment);

        // 添加 "admin" 角色并赋予所有其他角色拥有的权限
        $admin = $auth->createRole('admin');
        $commentAuditor->description = '系统管理员';
        $auth->add($admin);
        $auth->addChild($admin, $postAdmin);
        $auth->addChild($admin, $commentAuditor);


        // 为用户指派角色。其中 1 和 2 是由 IdentityInterface::getId() 返回的id (译者注:user表的id)
        // 通常在你的 User 模型中实现这个函数。
        $auth->assign($admin, 1);
        $auth->assign($postAdmin, 2);
        $auth->assign($postOperator, 3);
        $auth->assign($commentAuditor, 4);
    }

权限验证

if (Yii::$app->user->can('createPost')) {
    // 如果用户用权限 执行 createPost 操作  do  something
}

如果想让所有的注册用户拥有某一个权限,在高级模板中可以修改 frontendmodelsSignupForm::signup()中代码,如下

public function signup()
{
    if ($this->validate()) {
        $user = new User();
        $user->username = $this->username;
        $user->email = $this->email;
        $user->setPassword($this->password);
        $user->generateAuthKey();
        $user->save(false);

        // the following three lines were added:
        $auth = Yii::$app->authManager;
        $authorRole = $auth->getRole('author');
        $auth->assign($authorRole, $user->getId());

        return $user;
    }

    return null;
}

Using  Rules

规则就是添加额外的约束添加限制角色和权限,一个规则是继承于yiirbacRule,因此必须要实现execute()方法。在之前创建的author角色是不能编辑自己的文章,因此来验证下

namespace apprbac;

use yiirbacRule;

/**
 * Checks if authorID matches user passed via params
 */
class AuthorRule extends Rule
{
    public $name = 'isAuthor';

    /**
     * @param string|int $user the user ID.
     * @param Item $item the role or permission that this rule is associated with
     * @param array $params parameters passed to ManagerInterface::checkAccess().
     * @return bool a value indicating whether the rule permits the role or permission it is associated with.
     */
    public function execute($user, $item, $params)
    {
        return isset($params['post']) ? $params['post']->createdBy == $user : false;
    }
}

添加额外规则

$auth = Yii::$app->authManager;

// add the rule
$rule = new apprbacAuthorRule;
$auth->add($rule);

// add the "updateOwnPost" permission and associate the rule with it.
$updateOwnPost = $auth->createPermission('updateOwnPost');
$updateOwnPost->description = 'Update own post';
$updateOwnPost->ruleName = $rule->name;
$auth->add($updateOwnPost);

// "updateOwnPost" will be used from "updatePost"
$auth->addChild($updateOwnPost, $updatePost);

// allow "author" to update their own posts
$auth->addChild($author, $updateOwnPost);

Check  Accessing

第一种使用

if (Yii::$app->user->can('createPost')) {
    // create post
}

第二种,直接添加在自动验证机制中(behaviors)

public function behaviors()
{
    return [
        'access' => [
            'class' => AccessControl::className(),
            'rules' => [
                [
                    'allow' => true,
                    'actions' => ['index'],
                    'roles' => ['managePost'],
                ],
                [
                    'allow' => true,
                    'actions' => ['view'],
                    'roles' => ['viewPost'],
                ],
                [
                    'allow' => true,
                    'actions' => ['create'],
                    'roles' => ['createPost'],
                ],
                [
                    'allow' => true,
                    'actions' => ['update'],
                    'roles' => ['updatePost'],
                ],
                [
                    'allow' => true,
                    'actions' => ['delete'],
                    'roles' => ['deletePost'],
                ],
            ],
        ],
    ];
}
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