static public function getUploadUrl($isAbsolute=true)
    {
        $url = static::getCommon('uploadUrl');
        if ($isAbsolute && strpos($url, 'http') !== 0) {
            $baseUrl = static::getRootUrl();
            $url = rtrim($baseUrl, '/') . '/' . trim($url, '/');
        }
        
        return $url;
    }