lambda-spotify

Inspired by leerob.io, this is the updated & modified version for getting current playing or the most recently played song from Spotify via AWS Lambda function.

Instructions

Create App on Spotify

Create an app from Spotify Developer Dashboard. Add http://localhost:4567 as the redirect URI to the app settings.

Generate Refresh Token

For apps that use the Spotify API, users are required to login once every 60 minutes. This can be resolved by implementing the Authorization Code Flow and getting a refresh token. Using this flow requires that you set up your own server that performs a token swap and refresh.

I have listed two ways to generate this token. The refresh tokens never expire unless the user revokes it.

1. Easy way

I've created an automated script refresh_token.rb within the ./scripts/ directory. It's a terminal-based application where you can input the required info and retrieve the necessary token.

Ruby not installed on your machine? Here I added this to repl.it.

2. Hard Way

Authenticate your application with the app's client id. The client id and client secret can be retrieved from the Spotify Developer Dashboard at any time.

https://accounts.spotify.com/authorize?client_id={CLIENT_ID}&response_type=code&redirect_uri=http
%3A%2F%2Flocalhost:4567&scope=user-read-currently-playing%20
user-top-read%20user-read-recently-played

Save the value of the code parameter.

Generate Base 64 encoded string with the following keys: client_id:client_secret

Post the info to Spotify. Example:

axios.post({
  url: "https://accounts.spotify.com/api/token",
  headers: {
    Authorization: "Basic {base64 encoded client_id:client_secret}",
    "Content-Type": "application/x-www-form-urlencoded; charset=utf-8",
  },
  data:
    "grant_type=authorization_code&code={AUTH_CODE}&redirect_uri=http%3A%2F%2Flocalhost%3A4567",
});

Demo

I am using URL Params to identify whether I am currently playing a song or request the most recent music I played.

The URL below gives the current song I am playing, if I am, of course! Otherwise, it will return false.

https://4tiumvx0uh.execute-api.eu-west-2.amazonaws.com/what-im-listening?preference=nowPlaying

This one, on the other hand, will give the most recent piece.

https://4tiumvx0uh.execute-api.eu-west-2.amazonaws.com/what-im-listening?preference=mostRecent