class GetcontrollerController extends Controller{
public $json;

public function beforeAction( $event )
{
    $this->enableCsrfValidation = false;
    $this->json = Json::decode(file_get_contents("php://input"), false);
    header('content-type: text/javascript');
    return parent::beforeAction( $event );
}

public function actions()
{
    return [
        'error' => [
            'class' => 'yiiwebErrorAction',
        ]
    ];
}
public function actionIndex(){

    $file = $this->json->file;

    $handle = fopen( Yii::getAlias( "@webroot" ) . '\js2\controllers\' . $file . ".js", "r" );
    while( $line = fgets( $handle ) ){
        echo $line;
    }

    global $urlpath;

    echo "n//# sourceURL=" . $urlpath . "js2/" . $file . ".js";
 }

 }