obtain soundcloud token using p2.OAuth2 - ios

Question

I am trying to successfully retrive a SoundCloud Token using the p2/OAuth2 lib - github: https://github.com/p2/OAuth2
Basically I recreated the classes he provides in the example Project using SoundCloud properties
class SoundCloudLoader {
static var sharedInstance = SoundCloudLoader()
class func handleRedirectURL(url: NSURL) {
sharedInstance.oauth2.handleRedirectURL(url)
}
// MARK: - Instance
let baseURL = NSURL(string: "https://api.soundcloud.com")!
var oauth2 = OAuth2CodeGrant(settings: [
"client_id": "********", //copy/pasted from soundcloud
"client_secret": "********", //copy/pasted from soundcloud
"authorize_uri": "https://soundcloud.com/connect",
"token_uri": "https://api.soundcloud.com/oauth2/token",
"scope": "non-expiring",
"redirect_uris": ["myApp://oauth2"], // registered in info.plist and gets correctly called by AppDelegate
"keychain": false,
"verbose":true
])
/** Start the OAuth dance. */
func authorize(callback: (wasFailure: Bool, error: NSError?) -> Void) {
oauth2.afterAuthorizeOrFailure = callback
oauth2.authorize()
}
}
In AppDelegate i do the following:
func application(application: UIApplication, openURL url: NSURL, sourceApplication: String?, annotation: AnyObject?) -> Bool {
let backlink = url.absoluteString!
println(sourceApplication)
if sourceApplication == "com.apple.mobilesafari" || sourceApplication == "com.google.chrome.ios" {
if backlink.rangeOfString("myApp://oauth2") != nil {
SoundCloudLoader.handleRedirectURL(url)
}
}
}
Considering the Log File it seems like the first Request is successfully done and it breaks when calling the token_uri:
OAuth2: Initialized with client id XXX
OAuth2: No access token, maybe I can refresh
OAuth2: I don't have a refresh token, not trying to refresh
OAuth2: Authorizing against https://soundcloud.com/connect?client_id=XXX&redirect_uri=XXX&scope=non-expiring&response_type=code&state=xxx
Optional("com.apple.mobilesafari") //println of source App in AppDelegate Method
OAuth2: Handling redirect URL xxx?code=xxx&state=xxx#
OAuth2: Authorizing against https://api.soundcloud.com/oauth2/token?code=***&grant_type=authorization_code&client_id=xxx&redirect_uri=xxx&scope=non-expiring&state=xxx
OAuth2: Adding “Authorization” header as “Basic client-key:client-secret”
OAuth2: Exchanging code xxx with redirect xxx for access token at https://api.soundcloud.com/oauth2/token
OAuth2: Did not get access token expiration interval
OAuth2: Authorization error: invalid_client.
Error Domain=OAuth2ErrorDomain Code=605 "Authorization error: invalid_client." UserInfo=0x7f8aa05c6700 {NSLocalizedDescription=Authorization error: invalid_client.}
As I am a beginner in "OAuth things" does this logfile imply that the lib crashes because soundcloud does not give a expiration date for the token (in some blog post they said that they are currently using non-expiring tokens), or does it suddenly crash because the client-id is wrong? (which it is not, as it is the exact one in the soundcloud-dev backend and it is able to obtain a req-code).
Any hints would be greatly appreciated.

Answer 1

Try to add
oauth2.secretInBody = true
I had the same problem and that's made the trick for me.