Spotify session management
I have a spotify login in my app and try to made an autologin:
Login function
func getSpotifyToken(fromController controller: UIViewController, success: (spotifyToken: String?) -> Void, failure: (error: NSError?) -> Void) {
loginSuccessBlock = success
loginFailureBlock = failure
SPTAuth.defaultInstance().clientID = SpotifyClientID
SPTAuth.defaultInstance().redirectURL = NSURL(string: SpotifyRedirectURI)
SPTAuth.defaultInstance().requestedScopes = [SPTAuthStreamingScope, SPTAuthPlaylistReadPrivateScope]
let spotifyLoginController = SPTAuthViewController.authenticationViewController()
spotifyLoginController.delegate = self
spotifyLoginController.clearCookies { () -> Void in
controller.presentViewController(spotifyLoginController, animated: true, completion: nil)
}
}
Check if session exist
private func spotifyConnected() -> Bool {
if SPTAuth.defaultInstance().session == nil {
self.loadSpotifySession()
}
return SPTAuth.defaultInstance().session != nil
}
Save session
private func saveSpotifySession() {
let sessionData = NSKeyedArchiver.archivedDataWithRootObject(SPTAuth.defaultInstance().session)
NSUserDefaults.standardUserDefaults().setObject(sessionData, forKey: Spotify_Session_Key)
NSUserDefaults.standardUserDefaults().synchronize()
}
Load session
private func loadSpotifySession() {
if let sessionData = NSUserDefaults.standardUserDefaults().objectForKey(Spotify_Session_Key) as? NSData {
let session = NSKeyedUnarchiver.unarchiveObjectWithData(sessionData) as! SPTSession
SPTAuth.defaultInstance().session = session
}
}
Renew session - call at app start
func renewSpotifySession() {
guard spotifyConnected() else {
return
}
SPTAuth.defaultInstance().renewSession(SPTAuth.defaultInstance().session) { (error: NSError!, session: SPTSession!) -> Void in
if session != nil {
SPTAuth.defaultInstance().session = session
} else {
print("Failed to refresh spotify session")
}
}
}
renewSession return nil. I saw some info about refreshToken, But I don't know, where I can catch it.
How I can renew spotify session? maybe I made something wrong?
In order to renew the session without the user needing to re-authorize your app every 60 minutes, you'll need to have a server-side script running someplace that your app will call. The server side script then talks to the Spotify servers to renew or swap out the token for a new one.
The demo projects directory in the ios-sdk download contains a sample script that you can use locally for development.
Once you have that in place, it's pretty easy. Someplace you'll have some code that configures your swap / refresh URLs:
let auth = SPTAuth.defaultInstance()
auth.clientID = Constant.SPOTIFY_CLIENT_ID;
auth.redirectURL = Constant.SPOTIFY_AUTH_CALLBACK_URL
auth.tokenSwapURL = Constant.SPOTIFY_TOKEN_SWAP_URL
auth.tokenRefreshURL = Constant.SPOTIFY_TOKEN_REFRESH_URL
auth.sessionUserDefaultsKey = Constant.SPOTIFY_SESSION_USER_DEFAULTS_KEY
Then, when you want to login or renew the session, you can have something like this:
func loginOrRenewSession(handler: (loginTriggered: Bool, error: NSError?) -> Void) {
guard auth.session != nil else {
print("will trigger login")
UIApplication.sharedApplication().openURL(auth.loginURL)
handler(loginTriggered: true, error: nil)
return
}
if auth.session.isValid() {
print("already have a valid session, nothing to do")
handler(loginTriggered: false, error: nil)
return
}
print("will renew session")
auth.renewSession(auth.session) { error, session in
self.auth.session = session
handler(loginTriggered: false, error: error)
}
}
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