protected function defaultReturnUrl()
{
$params = $_GET;
foreach ($params as $name => $value) {
if (strncmp('openid', $name, 6) === 0) {
unset($params[$name]);
}
}
$params[0] = Yii::$app->requestedRoute;
$url = Yii::$app->getUrlManager()->createUrl($params);
return $this->getTrustRoot() . $url;
}