Generate Youtube like ID in Different Programming Languages

Currently, I have been given a task to create a media file system for managing files. And it came to my mind how do I create an identity for a file? I can use the default UUID generated by the database but I like to explore more like creating my own ID. After searching Google a lot of times I was able to find a piece of code and tried to convert them into different languages so here you go.

To be precise YouTube uses 64-bit numbers to generate the video ID which equals to 73,786,976,294,838,206,464 possible IDs. For more information about the math and number theory behind this, I can recommend the excellent YouTube video "Will YouTube Ever Run Out Of Video IDs?" from Tom Scott.

PHP

function generateHash(): string
{
    $bytes = random_bytes(8);
    $base64 = base64_encode($bytes);

    return rtrim(strtr($base64, '+/', '-_'), '=');
}

Python

import base64
import secrets

def generate_hash() -> str:
    bytes = secrets.token_bytes(8)
    base64_str = base64.urlsafe_b64encode(bytes).rstrip(b"=")
    return base64_str.decode("utf-8").translate(str.maketrans("+/", "-_"))

Java

import java.util.Base64;
import java.security.SecureRandom;

public class HashGenerator {
    public static String generateHash() {
        SecureRandom random = new SecureRandom();
        byte[] bytes = new byte[8];
        random.nextBytes(bytes);
        String base64 = Base64.getUrlEncoder().withoutPadding().encodeToString(bytes);
        return base64.replace('+', '-').replace('/', '_');
    }
}

JavaScript

function generateHash() {
    const bytes = new Uint8Array(8);
    crypto.getRandomValues(bytes);
    const base64 = btoa(String.fromCharCode.apply(null, bytes)).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
    return base64;
}

C#

using System.Security.Cryptography;
using System.Text;

public class HashGenerator {
    public static string GenerateHash() {
        var bytes = new byte[8];
        using (var rng = new RNGCryptoServiceProvider()) {
            rng.GetBytes(bytes);
        }
        var base64 = Convert.ToBase64String(bytes).Replace('+', '-').Replace('/', '_').TrimEnd('=');
        return base64;
    }
}

TypeScript

function generateHash(): string {
    const bytes = new Uint8Array(8);
    window.crypto.getRandomValues(bytes);
    const base64 = btoa(String.fromCharCode.apply(null, bytes))
        .replace(/\+/g, "-")
        .replace(/\//g, "_")
        .replace(/=+$/, "");
    return base64;
}

Conclusion

With that said you can create your own function or follow the codes above. Also, I recommend you add date time generated integer and convert it to something so that everything cannot be replicated, especially if it's based on date and time.