void OnAuthError(object sender, AuthenticatorErrorEventArgs e)
{
Debug.WriteLine(e.Message);
}
private void OnAuthenticationFailed(object sender, AuthenticatorErrorEventArgs e)
{
_authenticationDelegate.OnAuthenticationFailed(e.Message, e.Exception);
}
private void auth_Error(object sender, AuthenticatorErrorEventArgs e)
{
throw new Xamarin.Auth.AuthException("Auth Error");
}
protected void Authentication_Error(object sender, AuthenticatorErrorEventArgs e)
{
authenticator_page.Authentication_Error(sender, e);
return;
}
private void AuthOnError(object sender, AuthenticatorErrorEventArgs authenticatorErrorEventArgs)
{
_eventAggregator.GetEvent <LoginFailEvent>().Publish();
}
private async void auth_Failed(object sender, AuthenticatorErrorEventArgs eventArgs)
{
await Application.Current.MainPage.DisplayAlert(title : "Login failed!", message : eventArgs.Message, cancel : "Okay");
canLogin = true;
}
private void OnAuthenticationFailed(object sender, AuthenticatorErrorEventArgs e)
{
}
void HandleError (object sender, AuthenticatorErrorEventArgs e)
{
var after = keepTryingAfterError ?
(Action)BeginLoadingInitialUrl :
(Action)Cancel;
this.ShowError ("Connection Failed", "Check your Internet connection and try again.", after);
}
private void onAuthError(object sender, AuthenticatorErrorEventArgs e)
{
DisplayAlert("Google Authentication Error", e.Message, "OK");
}
async void OnAuthError(object sender, AuthenticatorErrorEventArgs e)
{
// Gestire eventuali errori nel login.
Application.Current.Quit();
}
private void AuthOnError(object sender, AuthenticatorErrorEventArgs authenticatorErrorEventArgs)
{
OnFail?.Invoke(sender, new OnFailEventArgs {
Error = authenticatorErrorEventArgs.Message
});
}
private void ObjOAuth2Authenticator_Error(object sender, AuthenticatorErrorEventArgs e)
{
throw new NotImplementedException();
}
public async void StartAuthentication(string clientId, string scope, string appSecret, Uri authorizeUrl, Uri redirectUrl, Uri tokenUrl, bool codeChallengeMethod)
{
string codeVerifier = "";
UriBuilder uriBuilder = new UriBuilder(authorizeUrl);
uriBuilder.Query += "?client_id=" + clientId + "&scope=" + Uri.EscapeUriString(scope) + "&response_type=code&redirect_uri=" + Uri.EscapeUriString(redirectUrl.AbsoluteUri);
// Codice opzionale di sicurezza
if (codeChallengeMethod)
{
codeVerifier = GetCodeVerifier();
string codeChallenge = Base64URLEncode(EncDecHelper.SHA256Bytes(codeVerifier));
uriBuilder.Query += "&code_challenge_method=S256&code_challenge=" + codeChallenge;
}
try
{
// Step 1: richiede il codice di autorizzazione
WebAuthenticationResult Result = await WebAuthenticationBroker.AuthenticateAsync(WebAuthenticationOptions.None,
uriBuilder.Uri,
redirectUrl);
if (Result.ResponseStatus == WebAuthenticationStatus.Success)
{
Account account = new Account();
// Estraggo il codice
string Code = "";
string QueryString = new Uri(Result.ResponseData).Query;
QueryString = QueryString.Substring(1); // Salta "?"
string[] QueryParams = QueryString.Split('&');
for (short i = 0; i < QueryParams.Length; i++)
{
if (QueryParams[i].Contains("code="))
{
Code = QueryParams[i].Substring(5);
break;
}
}
// Step 2: scambio il codice con un access token
HttpClient appClient = new HttpClient();
try
{
List <KeyValuePair <string, string> > Param = new List <KeyValuePair <string, string> >
{
new KeyValuePair <string, string>("client_id", clientId),
new KeyValuePair <string, string>("redirect_uri", Uri.EscapeUriString(redirectUrl.AbsoluteUri)),
new KeyValuePair <string, string>("code", Uri.EscapeUriString(Code)),
new KeyValuePair <string, string>("scope", scope),
new KeyValuePair <string, string>("grant_type", "authorization_code")
};
// Non è obbligatorio in certi casi (es: Google Drive API per iOS, Android e UWP)
if (appSecret != "")
{
Param.Add(new KeyValuePair <string, string>("client_secret", appSecret));
}
// Codice opzionale di verifica
if (codeChallengeMethod && codeVerifier != "")
{
Param.Add(new KeyValuePair <string, string>("code_verifier", codeVerifier));
}
FormUrlEncodedContent Content = new FormUrlEncodedContent(Param);
HttpResponseMessage Response = await appClient.PostAsync(tokenUrl, Content);
if (Response.IsSuccessStatusCode)
{
// Ottengo un JSON con l'access token, il refesh token e la scadenza.
string content = await Response.Content.ReadAsStringAsync();
JObject JsonObj = JObject.Parse(content);
if (JsonObj != null && JsonObj.ContainsKey("access_token"))
{
foreach (KeyValuePair <string, JToken> token in JsonObj)
{
account.Properties.Add(token.Key, token.Value.ToString());
}
account.Properties.Add("date_token", DateTime.Now.ToString("dd-MM-yyyy HH:mm:ss"));
// Step 3: richiedo un nuovo access token e un refresh token per aggiornare il
// token (in quando voglio accedere offline alla cartella di OneDrive)
OAuthAccountWrapper oAuthAccount = new OAuthAccountWrapper(account);
await RefreshToken(oAuthAccount, clientId, redirectUrl, appSecret, tokenUrl);
if (oAuthAccount.AccessToken.Length <= 0)
{
appClient.Dispose();
Debug.WriteLine("Authetication failed: access token not found in response");
throw new Exception("Access token not found in response");
}
appClient.Dispose();
Debug.WriteLine("Authetication succeeded!");
}
else
{
appClient.Dispose();
Debug.WriteLine("Authetication failed: malformed response");
throw new Exception("Malformed response");
}
}
else
{
appClient.Dispose();
Debug.WriteLine("Authetication failed: " + Response.StatusCode.ToString());
throw new Exception("HTTP Error: " + Response.StatusCode + "\nUnable to redeem a token");
}
AuthenticatorCompletedEventArgs AuthCompletedEventArgs = new AuthenticatorCompletedEventArgs(account);
Completed?.Invoke(this, AuthCompletedEventArgs);
}
catch (Exception Ex)
{
appClient.Dispose();
Debug.WriteLine("Authetication failed: " + Ex.Message);
throw;
}
}
else if (Result.ResponseStatus != WebAuthenticationStatus.UserCancel)
{
Debug.WriteLine("Authetication failed: " + Result.ResponseStatus.ToString());
throw new Exception("HTTP Error code: " + Result.ResponseErrorDetail + "\nError: " + Result.ResponseData);
}
else
{
Debug.WriteLine("Authetication cancelled by user");
// Passando null si avrà IsAuthenticated a false.
// Vedi https://github.com/xamarin/Xamarin.Auth/blob/master/source/Core/Xamarin.Auth.Common.LinkSource/AuthenticatorCompletedEventArgs.cs
AuthenticatorCompletedEventArgs AuthCompletedEventArgs = new AuthenticatorCompletedEventArgs(null);
Completed?.Invoke(this, AuthCompletedEventArgs);
}
}
catch (Exception Ex)
{
Debug.WriteLine("Authetication failed: " + Ex.Message);
AuthenticatorErrorEventArgs AuthCompletedEventArgs = new AuthenticatorErrorEventArgs(Ex);
Error?.Invoke(this, AuthCompletedEventArgs);
}
}
private void OnOAuth2Error(object sender, AuthenticatorErrorEventArgs e)
{
Error?.Invoke(sender, e);
}
private void OnTwitterAuthenticationFailed(object sender, AuthenticatorErrorEventArgs e)
{
DisplayAlert("Twitter Login Failed", "", "Close");
}
private async void Authenticator_Error(object sender, AuthenticatorErrorEventArgs e)
{
System.Diagnostics.Debug.WriteLine("AuthenticatorPageRenderer: In UWP Authenticator_Error");
return;
}
private void OnAuthError(object sender, AuthenticatorErrorEventArgs e)
{
MessageBox.Show(e.Message, "Error", MessageBoxButton.OK);
//NavigationService.GoBack();
}
void HandleError (object sender, AuthenticatorErrorEventArgs e)
{
var after = keepTryingAfterError ?
(Action)BeginLoadingInitialUrl :
(Action)Cancel;
if (authenticator.ShowUIErrors) {
if (e.Exception != null) {
this.ShowError ("Authentication Error", e.Exception, after);
} else {
this.ShowError ("Authentication Error", e.Message, after);
}
} else {
after ();
}
}
private void AuthOnError(object sender, AuthenticatorErrorEventArgs e)
{
}
