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Yii中srbac权限扩展模块工作原理与用法分析

更新时间:2020-03-10 02:01:55 作者:startmvc
本文实例讲述了Yii中srbac权限扩展模块工作原理与用法。分享给大家供大家参考,具体如下

本文实例讲述了Yii中srbac权限扩展模块工作原理与用法。分享给大家供大家参考,具体如下:

1. 设置权限规则表:可放在module模块配置文件里面


public function init() {
 //操作权限表,必须存在以下字段:
 //itemname角色名/ID,
 //type授权项目类型/1(任务)或者2(角色),
 //bizrule权限/逻辑运算表达式为false是有权限操作,
 //data数据/YII暂无利用
 Yii::app()->authManager->itemTable = 'AuthItem';
 //会员组-权限对应表,必须存在以下字段:
 //child子角色/ID,
 //parent父角色/ID,此表可循环执行,可多级继承
 Yii::app()->authManager->itemChildTable = 'uthItemChild';
 //会员-会员组对应表,会员组可直接为操作名称,必须存在以下字段:
 //itemname角色名/ID,
 //userid用户名/ID,
 //bizrule权限/逻辑运算表达式为false是有权限操作,
 //data数据/YII暂无利用
 Yii::app()->authManager->assignmentTable = 'zd_mem_glog';

2. 实现规则,所在控制器继承基类SBaseController,原来为Controller


class ProductController extends SBaseController
{
 ........
}
class SBaseController extends Controller
{
 ........
}

3. SBaseController继承基类Controller,前填加beforeAction,实现权限验证。


protected function beforeAction($action) {
 //载入模块分隔符
 $del = Helper::findModule('srbac')->delimeter;
 //取得前模块名称
 $mod = $this->module !== null ? $this->module->id . $del : "";
 $contrArr = explode("/", $this->id);
 $contrArr[sizeof($contrArr) - 1] = ucfirst($contrArr[sizeof($contrArr) - 1]);
 $controller = implode(".", $contrArr);
 $controller = str_replace("/", ".", $this->id);
 // 生成静态页面 模块+分隔符+控制器(首字母大写)+方法(首字母大写)例: model-ControllerAction
 if(sizeof($contrArr)==1){
 $controller = ucfirst($controller);
 }
 $access = $mod . $controller . ucfirst($this->action->id);
 //验证访问页面地址是否在总是允许列表里面,是返回有权限
 if (in_array($access, $this->allowedAccess())) {
 return true;
 }
 //验证SRBAC有无安装,没在安装,返回的权限访问
 if (!Yii::app()->getModule('srbac')->isInstalled()) {
 return true;
 }
 //验证SRBAC有无开启,没在开启,返回的权限访问
 if (Yii::app()->getModule('srbac')->debug) {
 return true;
 }
 // 权限验证
 if (!Yii::app()->user->checkAccess($access) || Yii::app()->user->isGuest) {
 $this->onUnauthorizedAccess();
 } else {
 return true;
 }
}

4. CDbAuthManager读取当前用户角色


public function getAuthAssignments($userId)
{
 $rows=$this->db->createCommand()
 ->select()
 ->from($this->assignmentTable)
 ->where('userid=:userid', array(':userid'=>$userId))
 ->queryAll();
 $assignments=array();
 foreach($rows as $row)
 {
 if(($data=@unserialize($row['data']))===false)
 $data=null;
 $assignments[$row['itemname']]=new CAuthAssignment($this,$row['itemname'],$row['userid'],$row['bizrule'],$data);
 }
 return $assignments;
}

5. CDbAuthManager读取角色对应权限


public function getAuthItem($name)
{
 $row=$this->db->createCommand()
 ->select()
 ->from($this->itemTable)
 ->where('name=:name', array(':name'=>$name))
 ->queryRow();
 if($row!==false)
 {
 if(($data=@unserialize($row['data']))===false)
 $data=null;
 return new CAuthItem($this,$row['name'],$row['type'],$row['description'],$row['bizrule'],$data);
 }
 else
 return null;
}

6. CDbAuthManager读取权限对应操作


protected function checkAccessRecursive($itemName,$userId,$params,$assignments)
{
 if(($item=$this->getAuthItem($itemName))===null)
 return false;
 Yii::trace('Checking permission "'.$item->getName().'"','system.web.auth.CDbAuthManager');
 if(!isset($params['userId']))
 $params['userId'] = $userId;
 if($this->executeBizRule($item->getBizRule(),$params,$item->getData()))
 {
 if(in_array($itemName,$this->defaultRoles))
 return true;
 if(isset($assignments[$itemName]))
 {
 $assignment=$assignments[$itemName];
 if($this->executeBizRule($assignment->getBizRule(),$params,$assignment->getData()))
 return true;
 }
 $parents=$this->db->createCommand()
 ->select('parent')
 ->from($this->itemChildTable)
 ->where('child=:name', array(':name'=>$itemName))
 ->queryColumn();
 foreach($parents as $parent)
 {
 if($this->checkAccessRecursive($parent,$userId,$params,$assignments))
 return true;
 }
 }
 return false;
}

7. CAuthManager验证权限


public function executeBizRule($bizRule,$params,$data)
{
 return $bizRule==='' || $bizRule===null || ($this->showErrors ? eval($bizRule)!=0 : @eval($bizRule)!=0);
}

8. 总是充许访问规则设置

Yii srbac 权限 扩展模块