This is a Vapor-based implementation of a Spotify Token Swap Service.
This repository does not contain a self-running application, but provides files which can be plugged or adapted into a Vapor-based project.
The given code compiles and runs with Vapor version 4.10.0.
I'm using these exact files in a current project and haven't encountered any issues so far, but plan to update this repo if I do.
Basically:
If you want to make API calls for a Spotify user from a client (e.g. an App), you need a token.
The client asks this backend service for a token, which will then contact the Spotify API and return a token, if all credentials match. This is the "token swap" .
The tokens expire, so there's another endpoint to "refresh" the Spotify token with a refresh token, which also gets returned during token swap.
In my implementation, the Spotify credentials are pulled from the environment, as can be seen in SpotifyEnvironment.swift
This implementation is basically an adapted version of this ruby-based example.
Another ruby-based implementation can be found here.
The Spotify documentation of the authorization flow can be found here.