Upload Page: Compute hash client-side before uploading file

[oxou]

It would be nice to add client-side checksum check on the upload page.

Right now the file is required to be fully uploaded before the server ensures it already exists (hash found in database),
but if you take a look at a website like https://virustotal.com, you'll see that whenever you upload a bigger file, for example "C:\windows\system32\d3d10warp.dll" it will compute the hash client-side and call the API to return back "true" or "false" depending on if the hash exists in the database.

Same procedure would be nice to be built into the upload page of DLL-Files, as this will save client time and also server costs for uploading that file - for someone with a slow internet connection this would be truly beneficial.

[DllAdmin]

That's a great idea!
I'll add the idea to the list of upcoming things to improve.