Converting short upload URLs to full URLs

Development
4

Interesting. I am not able to reproduce this with Javascript. Because your last method is a binary2hex conversion but the outcome from the base62 decode is not a binary representation from what I understand.

From a JS perspective I found the following stuff helpful:
https://www.npmjs.com/package/aybabtu

function fromBase62(s) {
  var digits = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
  var result = 0;
  for (var i = 0; i < s.length; i++) {
    var p = digits.indexOf(s[i]);
    if (p < 0) {
      return NaN;
    }
    result += p * Math.pow(digits.length, s.length - i - 1);
  }
  return result;
}

Unfortunately neither the bin2hex nor dec2hex methods help, when I use your input strings.

I created a codesandbox for that problem if someone is interested to play around with it. The final value is 1 for my input string which is wrong ;(

https://codesandbox.io/s/kind-hypatia-dp5vh0?file=/src/index.js

Thanks