Get short URL from long URL

Question

I was just reading this question How to code a URL shortener? where the top answer focusses on getting an auto-incremented ID for the long URL and then has functions which creates a short URL from the ID and also a function which goes back to the ID from the short URL.

However, would this not mean that if you input the same long URL again to generate a short URL it would auto-increment to a new ID and therefore create a different short URL?

If you wanted to make sure it returned the same short URL I think this means on the database that is currently storing a big hash table with just 'id' to 'long url' you need another index hash table for the 'long url' to 'id'?

Is there a more efficient way of doing this rather than having to double the memory storage?

Answer 1

I have an implementation for this, so basically I am generating a unique UUID for the specific URL as key and the actual url as value.

To make things more clear, here is the Github Link

In your front-end

<b><a href="{{***Value***}}">{{ **Key** }}</a></b>