本文實例講述了Yii中實現處理前後台登錄的新方法。分享給大家供大家參考,具體如下:
因為最近在做一個項目涉及到前後台登錄問題,我是把後台作為一個模塊(Module)來處理的。我看很多人放兩個入口文件index.php和admin.php,然後分別指向前台和後台。這種方法固然很好,可以將前後台完全分離,但我總覺得這種方式有點牽強,這和兩個應用啥區別?還不如做兩個App用一個framework更好。而且Yii官方後台使用方法也是使用Module的方式。但是Moudle的方式有一個很頭疼的問題,就是在使用Cwebuser登錄時會出現前後台一起登錄一起退出的問題,這顯然是不合理的。我糾結了很久才找到下文即將介紹的方法,當然,很多也是參考別人的,自己稍作了改動。我一開始的做法是在後台登錄時設置一個isadmin的session,然後再前台登錄時注銷這個session,這樣做只能辨別是前台登錄還是後台登錄,但做不到前後台一起登錄,也即前台登錄了後台就退出了,後台登錄了前台就退出了。出現這種原因的根本原因是我們使用了同一個Cwebuser實例,不能同時設置前後台session,要解決這個問題就要將前後台使用不同的Cwebuser實例登錄。下面是我的做法,首先看protected->config->main.php裡對前台user(Cwebuser)的配置:
'user'=>array( 'class'=>'WebUser',//這個WebUser是繼承CwebUser,稍後給出它的代碼 'stateKeyPrefix'=>'member',//這個是設置前台session的前綴 'allowAutoLogin'=>true,//這裡設置允許cookie保存登錄信息,一邊下次自動登錄 ),
在你用Gii生成一個admin(即後台模塊名稱)模塊時,會在module->admin下生成一個AdminModule.php文件,該類繼承了CWebModule類,下面給出這個文件的代碼,關鍵之處就在該文件,望大家仔細研究:
<?php class AdminModule extends CWebModule { public function init() { // this method is called when the module is being created // you may place code here to customize the module or the application parent::init();//這步是調用main.php裡的配置文件 // import the module-level models and componen $this->setImport(array( 'admin.models.*', 'admin.components.*', )); //這裡重寫父類裡的組件 //如有需要還可以參考API添加相應組件 Yii::app()->setComponents(array( 'errorHandler'=>array( 'class'=>'CErrorHandler', 'errorAction'=>'admin/default/error', ), 'admin'=>array( 'class'=>'AdminWebUser',//後台登錄類實例 'stateKeyPrefix'=>'admin',//後台session前綴 'loginUrl'=>Yii::app()->createUrl('admin/default/login'), ), ), false); //下面這兩行我一直沒搞定啥意思,貌似CWebModule裡也沒generatorPaths屬性和findGenerators()方法 //$this->generatorPaths[]='admin.generators'; //$this->controllerMap=$this->findGenerators(); } public function beforeControllerAction($controller, $action) { if(parent::beforeControllerAction($controller, $action)) { $route=$controller->id.'/'.$action->id; if(!$this->allowIp(Yii::app()->request->userHostAddress) && $route!=='default/error') throw new CHttpException(403,"You are not allowed to access this page."); $publicPages=array( 'default/login', 'default/error', ); if(Yii::app()->admin->isGuest && !in_array($route,$publicPages)) Yii::app()->admin->loginRequired(); else return true; } return false; } protected function allowIp($ip) { if(empty($this->ipFilters)) return true; foreach($this->ipFilters as $filter) { if($filter==='*' || $filter===$ip || (($pos=strpos($filter,'*'))!==false && !strncmp($ip,$filter,$pos))) return true; } return false; } } ?>
AdminModule 的init()方法就是給後台配置另外的登錄實例,讓前後台使用不同的CWebUser,並設置後台session前綴,以便與前台session區別開來(他們同事存在$_SESSION這個數組裡,你可以打印出來看看)。
這樣就已經做到了前後台登錄分離開了,但是此時你退出的話你就會發現前後台一起退出了。於是我找到了logout()這個方法,發現他有一個參數$destroySession=true,原來如此,如果你只是logout()的話那就會將session全部注銷,加一個false參數的話就只會注銷當前登錄實例的session了,這也就是為什麼要設置前後台session前綴的原因了,下面我們看看設置了false參數的logout方法是如何注銷session的:
/** * Clears all user identity information from persistent storage. * This will remove the data stored via {@link setState}. */ public function clearStates() { $keys=array_keys($_SESSION); $prefix=$this->getStateKeyPrefix(); $n=strlen($prefix); foreach($keys as $key) { if(!strncmp($key,$prefix,$n)) unset($_SESSION[$key]); } }
看到沒,就是利用匹配前綴的去注銷的。
到此,我們就可以做到前後台登錄分離,退出分離了。這樣才更像一個應用,是吧?嘿嘿…
差點忘了說明一下:
Yii::app()->user //前台訪問用戶信息方法 Yii::app()->admin //後台訪問用戶信息方法
不懂的仔細看一下剛才前後台CWebUser的配置。
附件1:WebUser.php代碼:
<?php class WebUser extends CWebUser { public function __get($name) { if ($this->hasState('__userInfo')) { $user=$this->getState('__userInfo',array()); if (isset($user[$name])) { return $user[$name]; } } return parent::__get($name); } public function login($identity, $duration) { $this->setState('__userInfo', $identity->getUser()); parent::login($identity, $duration); } } ?>
附件2:AdminWebUser.php代碼
<?php class AdminWebUser extends CWebUser { public function __get($name) { if ($this->hasState('__adminInfo')) { $user=$this->getState('__adminInfo',array()); if (isset($user[$name])) { return $user[$name]; } } return parent::__get($name); } public function login($identity, $duration) { $this->setState('__adminInfo', $identity->getUser()); parent::login($identity, $duration); } } ?>
附件3:前台UserIdentity.php代碼
<?php /** * UserIdentity represents the data needed to identity a user. * It contains the authentication method that checks if the provided * data can identity the user. */ class UserIdentity extends CUserIdentity { /** * Authenticates a user. * The example implementation makes sure if the username and password * are both 'demo'. * In practical applications, this should be changed to authenticate * against some persistent user identity storage (e.g. database). * @return boolean whether authentication succeeds. */ public $user; public $_id; public $username; public function authenticate() { $this->errorCode=self::ERROR_PASSWORD_INVALID; $user=User::model()->find('username=:username',array(':username'=>$this->username)); if ($user) { $encrypted_passwd=trim($user->password); $inputpassword = trim(md5($this->password)); if($inputpassword===$encrypted_passwd) { $this->errorCode=self::ERROR_NONE; $this->setUser($user); $this->_id=$user->id; $this->username=$user->username; //if(isset(Yii::app()->user->thisisadmin)) // unset (Yii::app()->user->thisisadmin); } else { $this->errorCode=self::ERROR_PASSWORD_INVALID; } } else { $this->errorCode=self::ERROR_USERNAME_INVALID; } unset($user); return !$this->errorCode; } public function getUser() { return $this->user; } public function getId() { return $this->_id; } public function getUserName() { return $this->username; } public function setUser(CActiveRecord $user) { $this->user=$user->attributes; } }
附件4:後台UserIdentity.php代碼
<?php /** * UserIdentity represents the data needed to identity a user. * It contains the authentication method that checks if the provided * data can identity the user. */ class UserIdentity extends CUserIdentity { /** * Authenticates a user. * The example implementation makes sure if the username and password * are both 'demo'. * In practical applications, this should be changed to authenticate * against some persistent user identity storage (e.g. database). * @return boolean whether authentication succeeds. */ public $admin; public $_id; public $username; public function authenticate() { $this->errorCode=self::ERROR_PASSWORD_INVALID; $user=Staff::model()->find('username=:username',array(':username'=>$this->username)); if ($user) { $encrypted_passwd=trim($user->password); $inputpassword = trim(md5($this->password)); if($inputpassword===$encrypted_passwd) { $this->errorCode=self::ERROR_NONE; $this->setUser($user); $this->_id=$user->id; $this->username=$user->username; // Yii::app()->user->setState("thisisadmin", "true"); } else { $this->errorCode=self::ERROR_PASSWORD_INVALID; } } else { $this->errorCode=self::ERROR_USERNAME_INVALID; } unset($user); return !$this->errorCode; } public function getUser() { return $this->admin; } public function getId() { return $this->_id; } public function getUserName() { return $this->username; } public function setUser(CActiveRecord $user) { $this->admin=$user->attributes; } }
希望本文所述對大家基於Yii框架的PHP程序設計有所幫助。