Basicaly, we store the URL in database, so it has a numeric ID, an we convert it to a another base in order to have a "stringified" version of the ID.
When we have the short URL the process is:
- convert the "stringified" ID to the numeric ID.
- load the data from DB.
- redirect to the original URL using an HTTP redirection.
More theory here in this stackoverflow topic.
The projet is using SQLite as DB backed. The data file is named urlshortener.db by default. To create the data file use the command dotnet ef database update, them run the project with dotnet run.
Make a post to http://localhost:5000/ShortUrls with a URL in JSON on body to create a new short url. And Make a GET to http://localhost:5000/ShortUrls/{shortURL} to redirect to original URL.