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// This example demonstrates how to authenticate with Spotify using the authorization code flow.
// In order to run this example yourself, you'll need to:
// 1. Register an application at:
// - Use "http://localhost:8080/callback" as the redirect URI
// 2. Set the SPOTIFY_ID environment variable to the client ID you got in step 1.
// 3. Set the SPOTIFY_SECRET environment variable to the client secret from step 1.
package main
import (
// redirectURI is the OAuth redirect URI for the application.
// You must register an application at Spotify's developer portal
// and enter this value.
const redirectURI = "http://localhost:8080/callback"
var (
auth = spotify.NewAuthenticator(redirectURI, spotify.ScopeUserReadPrivate)
ch = make(chan *spotify.Client)
state = "abc123"
func main() {
// first start an HTTP server
http.HandleFunc("/callback", completeAuth)
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
log.Println("Got request for:", r.URL.String())
go http.ListenAndServe(":8080", nil)
url := auth.AuthURL(state)
fmt.Println("Please log in to Spotify by visiting the following page in your browser:", url)
// wait for auth to complete
client := <-ch
// use the client to make calls that require authorization
user, err := client.CurrentUser()
if err != nil {
fmt.Println("You are logged in as:", user.ID)
func completeAuth(w http.ResponseWriter, r *http.Request) {
tok, err := auth.Token(state, r)
if err != nil {
http.Error(w, "Couldn't get token", http.StatusForbidden)
if st := r.FormValue("state"); st != state {
http.NotFound(w, r)
log.Fatalf("State mismatch: %s != %s\n", st, state)
// use the token to get an authenticated client
client := auth.NewClient(tok)
fmt.Fprintf(w, "Login Completed!")
ch <- &client