Yii中处理前后台登录新方法 | 饭饭博客

Yii中处理前后台登录新方法

因为最近在做一个项目涉及到前后台登录问题,我是把后台作为一个模块(Module)来处理的。我看很多人放两个入口文件index.php和admin.php,然后分别指向前台和后台。这种方法固然很好,可以将前后台完全分离,但我总觉得这种方式有点牵强,这和两个应用啥区别?还不如做两个App用一个framework更好。而且Yii官方后台使用方法也是使用Module的方式。但是Moudle的方式有一个很头疼的问题,就是在使用Cwebuser登录时会出现前后台一起登录一起退出的问题,这显然是不合理的。我纠结了很久才找到下文即将介绍的方法,当然,很多也是参考别人的,自己稍作了改动。我一开始的做法是在后台登录时设置一个isadmin的session,然后再前台登录时注销这个session,这样做只能辨别是前台登录还是后台登录,但做不到前后台一起登录,也即前台登录了后台就退出了,后台登录了前台就退出了。出现这种原因的根本原因是我们使用了同一个Cwebuser实例,不能同时设置前后台session,要解决这个问题就要将前后台使用不同的Cwebuser实例登录。下面是我的做法,首先看protected->config->main.php里对前台user(Cwebuser)的配置:

1 'user'=>array(
2             'class'=>'WebUser',//这个WebUser是继承CwebUser,稍后给出它的代码
3             'stateKeyPrefix'=>'member',//这个是设置前台session的前缀
4         'allowAutoLogin'=>true,//这里设置允许cookie保存登录信息,一边下次自动登录
5     ),

在你用Gii生成一个admin(即后台模块名称)模块时,会在module->admin下生成一个AdminModule.php文件,该类继承了CWebModule类,下面给出这个文件的代码,关键之处就在该文件,望大家仔细研究:

01 <?php
02  
03 class AdminModule extends CWebModule
04 {
05     public function init()
06     {
07      // this method is called when the module is being created
08      // you may place code here to customize the module or the application
09          parent::init();//这步是调用main.php里的配置文件
10     // import the module-level models and componen
11     $this->setImport(array(
12         'admin.models.*',
13         'admin.components.*',
14     ));
15         //这里重写父类里的组件
16         //如有需要还可以参考API添加相应组件
17            Yii::app()->setComponents(array(
18                    'errorHandler'=>array(
19                            'class'=>'CErrorHandler',
20                            'errorAction'=>'admin/default/error',
21                    ),
22                    'admin'=>array(
23                            'class'=>'AdminWebUser',//后台登录类实例
24                            'stateKeyPrefix'=>'admin',//后台session前缀
25                            'loginUrl'=>Yii::app()->createUrl('admin/default/login'),
26                    ),
27            ), false);
28            //下面这两行我一直没搞定啥意思,貌似CWebModule里也没generatorPaths属性和findGenerators()方法
29            //$this->generatorPaths[]='admin.generators';
30            //$this->controllerMap=$this->findGenerators();
31     }
32     public function beforeControllerAction($controller, $action){
33             if(parent::beforeControllerAction($controller, $action)){
34                 $route=$controller->id.'/'.$action->id;
35                 if(!$this->allowIp(Yii::app()->request->userHostAddress) && $route!=='default/error')
36                         throw new CHttpException(403,"You are not allowed to access this page.");
37                 $publicPages=array(
38                         'default/login',
39                         'default/error',
40                 );
41                 if(Yii::app()->user->isGuest && !in_array($route,$publicPages))
42                         Yii::app()->user->loginRequired();
43                 else
44                         return true;
45             }
46             return false;
47         }
48        protected function allowIp($ip)
49         {
50                 if(empty($this->ipFilters))
51                         return true;
52                 foreach($this->ipFilters as $filter)
53                 {
54                         if($filter==='*' || $filter===$ip || (($pos=strpos($filter,'*'))!==false && !strncmp($ip,$filter,$pos)))
55                                 return true;
56                 }
57                 return false;
58         }
59 }
60 ?>

AdminModule 的init()方法就是给后台配置另外的登录实例,让前后台使用不同的CWebUser,并设置后台session前缀,以便与前台session区别开来(他们同事存在$_SESSION这个数组里,你可以打印出来看看)。

这样就已经做到了前后台登录分离开了,但是此时你退出的话你就会发现前后台一起退出了。于是我找到了logout()这个方法,发现他有一个参数$destroySession=true,原来如此,如果你只是logout()的话那就会将session全部注销,加一个false参数的话就只会注销当前登录实例的session了,这也就是为什么要设置前后台session前缀的原因了,下面我们看看设置了false参数的logout方法是如何注销session的:

01 /**
02 * Clears all user identity information from persistent storage.
03  * This will remove the data stored via {@link setState}.
04  */
05 public function clearStates()
06 {
07     $keys=array_keys($_SESSION);
08     $prefix=$this->getStateKeyPrefix();
09     $n=strlen($prefix);
10     foreach($keys as $key)
11     {
12         if(!strncmp($key,$prefix,$n))
13               unset($_SESSION[$key]);
14     }
15 }

看到没,就是利用匹配前缀的去注销的。

到此,我们就可以做到前后台登录分离,退出分离了。这样才更像一个应用,是吧?嘿嘿…

差点忘了说明一下:

1 Yii::app()->user//前台访问用户信息方法
2 Yii::app()->admin//后台访问用户信息方法

不懂的仔细看一下刚才前后台CWebUser的配置。

附件1:WebUser.php代码:

01 <?php
02 class WebUser extends CWebUser
03 {
04     public function __get($name)
05     {
06         if ($this->hasState('__userInfo')) {
07             $user=$this->getState('__userInfo',array());
08             if (isset($user[$name])) {
09                 return $user[$name];
10             }
11         }
12  
13         return parent::__get($name);
14     }
15  
16     public function login($identity, $duration) {
17         $this->setState('__userInfo', $identity->getUser());
18         parent::login($identity, $duration);
19     }
20 }
21  
22 ?>

附件2:AdminWebUser.php代码

01 <?php
02 class AdminWebUser extends CWebUser
03 {
04     public function __get($name)
05     {
06         if ($this->hasState('__adminInfo')) {
07             $user=$this->getState('__adminInfo',array());
08             if (isset($user[$name])) {
09                 return $user[$name];
10             }
11         }
12  
13         return parent::__get($name);
14     }
15  
16     public function login($identity, $duration) {
17         $this->setState('__adminInfo', $identity->getUser());
18         parent::login($identity, $duration);
19     }
20 }
21  
22 ?>

附件三:前台UserIdentity.php代码

01 <?php
02  
03 /**
04  * UserIdentity represents the data needed to identity a user.
05  * It contains the authentication method that checks if the provided
06  * data can identity the user.
07  */
08 class UserIdentity extends CUserIdentity
09 {
10     /**
11      * Authenticates a user.
12      * The example implementation makes sure if the username and password
13      * are both 'demo'.
14      * In practical applications, this should be changed to authenticate
15      * against some persistent user identity storage (e.g. database).
16      * @return boolean whether authentication succeeds.
17      */
18     public $user;
19     public $_id;
20     public $username;
21     public function authenticate()
22     {  
23         $this->errorCode=self::ERROR_PASSWORD_INVALID;
24         $user=User::model()->find('username=:username',array(':username'=>$this->username));
25          if ($user)
26         {
27             $encrypted_passwd=trim($user->password);
28             $inputpassword = trim(md5($this->password));
29             if($inputpassword===$encrypted_passwd)
30             {
31                 $this->errorCode=self::ERROR_NONE;
32                 $this->setUser($user);
33                 $this->_id=$user->id;
34                 $this->username=$user->username;
35                 //if(isset(Yii::app()->user->thisisadmin))
36                    // unset (Yii::app()->user->thisisadmin);
37             }
38             else
39             {
40                 $this->errorCode=self::ERROR_PASSWORD_INVALID;
41  
42             }
43         }
44         else
45         {
46             $this->errorCode=self::ERROR_USERNAME_INVALID;
47         }
48  
49         unset($user);
50         return !$this->errorCode;
51  
52     }
53     public function getUser()
54     {
55         return $this->user;
56     }
57  
58     public function getId()
59         {
60                 return $this->_id;
61         }
62  
63     public function getUserName()
64         {
65                 return $this->username;
66         }
67  
68     public function setUser(CActiveRecord $user)
69     {
70         $this->user=$user->attributes;
71     }
72 }

附件四:后台UserIdentity.php代码

01 <?php
02  
03 /**
04  * UserIdentity represents the data needed to identity a user.
05  * It contains the authentication method that checks if the provided
06  * data can identity the user.
07  */
08 class UserIdentity extends CUserIdentity
09 {
10     /**
11      * Authenticates a user.
12      * The example implementation makes sure if the username and password
13      * are both 'demo'.
14      * In practical applications, this should be changed to authenticate
15      * against some persistent user identity storage (e.g. database).
16      * @return boolean whether authentication succeeds.
17      */
18     public $admin;
19     public $_id;
20     public $username;
21     public function authenticate()
22     {  
23         $this->errorCode=self::ERROR_PASSWORD_INVALID;
24         $user=Staff::model()->find('username=:username',array(':username'=>$this->username));
25          if ($user)
26         {
27             $encrypted_passwd=trim($user->password);
28             $inputpassword = trim(md5($this->password));
29             if($inputpassword===$encrypted_passwd)
30             {
31                 $this->errorCode=self::ERROR_NONE;
32                 $this->setUser($user);
33                 $this->_id=$user->id;
34                 $this->username=$user->username;
35                // Yii::app()->user->setState("thisisadmin", "true");
36             }
37             else
38             {
39                 $this->errorCode=self::ERROR_PASSWORD_INVALID;
40  
41             }
42         }
43         else
44         {
45             $this->errorCode=self::ERROR_USERNAME_INVALID;
46         }
47  
48         unset($user);
49         return !$this->errorCode;
50  
51     }
52     public function getUser()
53     {
54         return $this->admin;
55     }
56  
57     public function getId()
58         {
59                 return $this->_id;
60         }
61  
62     public function getUserName()
63         {
64                 return $this->username;
65         }
66  
67     public function setUser(CActiveRecord $user)
68     {
69         $this->admin=$user->attributes;
70     }
71 }

 

 

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