Now I'm using WebDAV protocol for sharing files for writing my own webdav client.
I want to implement fetching thumbnails previews from specified file located web server (nginx/Apache/other). WebServer must generate thumbnail/preview image and return that with PROPFIND request or another way.
Is there any property from propfind or response header described in RFC and supported from webservers with nginx/Apache?
My answer is brief. There is no standard for this.