Getting OAuth2 access token for Youtube API through Swift - ios

Question

I am working on an iOS mobile application where I need to upload videos using the Youtube Data API. In general, I understand the workflow needed:
1) Send a request to an authentication endpoint using clientId, clientSecret, and other details.
2) The service authenticates the client, and sends back a request to a client-specified callbackURL containing the access token.
3) The client provides the token in the header whenever he/she wants sends future requests.
I've successfully uploaded Youtube videos using node.js script, but I'm having a lot of trouble understanding how to implement this in Swift. In my VideoManagementController, I have a button that triggers the upload of a sample.mp4 file:
let headers = ["Authorization": "Bearer \(self.newToken))"]
let path = Bundle.main.path(forResource: "sample", ofType: ".mp4")
let videodata : NSData = NSData.dataWithContentsOfMappedFile(path!)! as! NSData
print("TOKEN: \(String(describing: token))")
Alamofire.request("https://www.googleapis.com/upload/youtube/v3/videos?part=id", method: .post, parameters: nil, encoding: JSONEncoding.default, headers: headers).responseJSON { (response) in
print(response)
}
I am attempting to retrieve my access token in the viewDidLoad() stage of the controller:
let authorizationEndpoint = URL(string: "https://accounts.google.com/o/oauth2/v2/auth")
let tokenEndpoint = URL(string: "https://www.googleapis.com/oauth2/v4/token")
let configuration = OIDServiceConfiguration(authorizationEndpoint: authorizationEndpoint!, tokenEndpoint: tokenEndpoint!)
let request = OIDAuthorizationRequest(configuration: configuration, clientId: self.kClientID, scopes: [OIDScopeOpenID, OIDScopeProfile], redirectURL: self.KRedirectURI!, responseType: OIDResponseTypeCode, additionalParameters: nil)
let appDelegate: AppDelegate? = (UIApplication.shared.delegate as? AppDelegate)
print("REACHED")
appDelegate?.currentAuthorizationFlow = OIDAuthState.authState(byPresenting: request, presenting: self, callback: {(_ authState: OIDAuthState?, _ error: Error?) -> Void in
if (authState != nil) {
print("TOKEN: Got authorization tokens. Access token: \(String(describing: authState?.lastTokenResponse?.accessToken))")
self.newToken = authState?.lastTokenResponse?.accessToken
self.authState = authState
}
else {
print("TOKEN: Authorization error: \(String(describing: error?.localizedDescription))")
self.authState = nil
}
})
The issue is that my access token retrieval code essentially hangs and never completes. It reaches the print statement "REACHED" but never comes out of this following portion of code:
appDelegate?.currentAuthorizationFlow = OIDAuthState.authState(byPresenting: request, presenting: self, callback: {(_ authState: OIDAuthState?, _ error: Error?) -> Void in
if (authState != nil) {
print("TOKEN: Got authorization tokens. Access token: \(String(describing: authState?.lastTokenResponse?.accessToken))")
self.newToken = authState?.lastTokenResponse?.accessToken
}
else {
print("TOKEN: Authorization error: \(String(describing: error?.localizedDescription))")
self.authState = nil
}
I do not either get a new token or get the authorization error print out.
I suspect it has something to do with my callbackURL. I don't think Swift knows where to "listen" to get my access token from. A callbackURL endpoint is relatively easy to set up server-side in node.js, for example, but how do I do this in Swift? Or is this even the real issue?

Answer 1

i have tired in my code like this way , you also need to check sometime encoding type URLEncoding.httpBody hope it may help , it helps me in using through oauth
let headers = [
"Content-Type": "application/x-www-form-urlencoded"
]
Alamofire.request("https://accounts.google.com/o/oauth2/revoke?token={\(token)}", method: .post, parameters: parameters, encoding: URLEncoding.httpBody, headers: headers).responseJSON { (response:DataResponse<Any>) in