OpenLiteSpeed has proxy function http://open.litespeedtech.com/mediawiki/index.php/Help:How_To_Set_Up_Reverse_Proxy_With_Template but it relies on having the files on remote backend server. Is there any feature to allow Nginx's proxy_store equivalent http://wiki.nginx.org/HttpProxyModule#proxy_store to allow mirroring and creating a local copy on the actual proxy server ?