Check if a file exists on server: Calculates MD5 hash for a selected file and asks a server if such file already exists there.

Description

Calculating MD5 hash may be handy for various applications. In particular, it is a great way to create a fingerprint of a file so that you could easily check whether you already have this file on your server.

Note, calculating hash for large files may take too much time, so in this demo we have limited a file size by 10MB.