/**
  * 用户登录
  */
 public function indexAction()
 {
     $auth = Zend_Auth::getInstance();
     if (!$auth->hasIdentity()) {
         $authAdapter = $this->getInvokeArg('bootstrap')->getResource('auth');
         if ($authAdapter instanceof ZtChart_Model_Auth_Adapter_Sso) {
             $this->_redirect(ZtChart_Model_Auth_Adapter_Sso::getLogin());
         } else {
             if ($authAdapter instanceof ZtChart_Model_Auth_Adapter_Soap) {
                 $this->_forward('soap');
             }
         }
     }
 }