Decoding "upload://" identifier to url

[RGJ (Richard - Communiteq)]

Hard to find indeed, but here you go.

Converting short upload URLs to full URLs

First base62 decode using the inverted character set, then hex encode the result. In Python code it looks like this: rebase = hex(base62.decode(base, base62.CHARSET_INVERTED))[2:].zfill(40)