YII 类库手册

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;
}

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.");

        $publicPages=array(
            'default/login',
            'default/error',
        );
        if($this->password!==false && Yii::app()->user->isGuest && !in_array($route,$publicPages))
            Yii::app()->user->loginRequired();
        else
            return true;
    }
    return false;
}

protected function findGenerators()
{
    $generators=array();
    $n=count($this->generatorPaths);
    for($i=$n-1;$i>=0;--$i)
    {
        $alias=$this->generatorPaths[$i];
        $path=Yii::getPathOfAlias($alias);
        if($path===false || !is_dir($path))
            continue;

        $names=scandir($path);
        foreach($names as $name)
        {
            if($name[0]!=='.' && is_dir($path.'/'.$name))
            {
                $className=ucfirst($name).'Generator';
                if(is_file("$path/$name/$className.php"))
                {
                    $generators[$name]=array(
                        'class'=>"$alias.$name.$className",
                    );
                }

                if(isset($generators[$name]) && is_dir("$path/$name/templates"))
                {
                    $templatePath="$path/$name/templates";
                    $dirs=scandir($templatePath);
                    foreach($dirs as $dir)
                    {
                        if($dir[0]!=='.' && is_dir($templatePath.'/'.$dir))
                            $generators[$name]['templates'][$dir]=strtr($templatePath.'/'.$dir,array('/'=>DIRECTORY_SEPARATOR,'\\'=>DIRECTORY_SEPARATOR));
                    }
                }
            }
        }
    }
    return $generators;
}

public function getAssetsUrl()
{
    if($this->_assetsUrl===null)
        $this->_assetsUrl=Yii::app()->getAssetManager()->publish(Yii::getPathOfAlias('gii.assets'));
    return $this->_assetsUrl;
}

public function init()
{
    parent::init();
    Yii::app()->setComponents(array(
        'errorHandler'=>array(
            'class'=>'CErrorHandler',
            'errorAction'=>$this->getId().'/default/error',
        ),
        'user'=>array(
            'class'=>'CWebUser',
            'stateKeyPrefix'=>'gii',
            'loginUrl'=>Yii::app()->createUrl($this->getId().'/default/login'),
        ),
    ), false);
    $this->generatorPaths[]='gii.generators';
    $this->controllerMap=$this->findGenerators();
}

public function setAssetsUrl($value)
{
    $this->_assetsUrl=$value;
}