Yii中处理前后台登录新方法

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:

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

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：

<?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();//这步是调用main.php里的配置文件
// import the module-level models and componen
$this->setImport(array(
'admin.models.*',
'admin.components.*',
));
//这里重写父类里的组件
//如有需要还可以参考API添加相应组件
Yii::app()->setComponents(array(
'errorHandler'=>array(
'class'=>'CErrorHandler',
'errorAction'=>'admin/default/error',
),
'admin'=>array(
'class'=>'AdminWebUser',//后台登录类实例
'stateKeyPrefix'=>'admin',//后台session前缀
'loginUrl'=>Yii::app()->createUrl('admin/default/login'),
),
), false);
//下面这两行我一直没搞定啥意思，貌似CWebModule里也没generatorPaths属性和findGenerators()方法
//$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.");
$publicPages=array(
'default/login',
'default/error',
);
if(Yii::app()->user->isGuest && !in_array($route,$publicPages))
Yii::app()->user->loginRequired();
else
return true;
}
return false;
}
protected function allowIp($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：

/**
* 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：

Yii::app()->user//前台访问用户信息方法
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。

WebUser.php代码：

<?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);
}
}
?>

AdminWebUser.php代码

<?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);
}
}
?>

前台UserIdentity.php代码

<?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;
}
}

后台UserIdentity.php代码

<?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;
}
}

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Yii中处理前后台登录新方法

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