/**
*
*/
protected function &get_alioss()
{
require_once dirname(dirname(dirname(__FILE__))) . '/lib/ali-oss/sdk.class.php';
$oss_sdk_service = new ALIOSS(null, null, $this->hostname);
//设置是否打开curl调试模式
$oss_sdk_service->set_debug_mode(FALSE);
return $oss_sdk_service;
}