SdFat filemanager libraries?

Has anyone ever written any kind of simple file manager libraries using things like the SdFat tools? I know the SD web server has some basic stuff and someone created one to use over serial connections with zmodem support, but having something, perhaps with a javascript/ajax front-end html flat file that would work over ethernet or wifi for managing the content of http server files on an arduino or esp based web server is something I could really use right now. I'm just wondering if anyone has ever done anything like that before I grab the sd webserver, upgrade it to sdfat support and start adding functionality I need to it?