public static Task <int> RequestRefreshTokenAsync(this OAuth2Authenticator authenticator, string refreshToken)
#endif
{
var queryValues = new Dictionary <string, string>
{
{ "refresh_token", refreshToken },
{ "client_id", authenticator.ClientId },
{ "grant_type", "refresh_token" }
};
if (!string.IsNullOrEmpty(authenticator.ClientSecret))
{
queryValues["client_secret"] = authenticator.ClientSecret;
}
return(authenticator.RequestAccessTokenAsync(queryValues)
.ContinueWith
(
result =>
{
var accountProperties = result.Result;
authenticator.OnRetrievedAccountProperties(accountProperties);
return int.Parse(accountProperties["expires_in"]);
}
));
}
private async Task GetRefreshToken()
{
try
{
var account = AccountStore.Create().FindAccountsForService(Constants.AppName).FirstOrDefault();
if (account == null)
{
await Navigation.PushModalAsync(new Login());
return;
}
var refreshToken = account.Properties["refresh_token"];
if (string.IsNullOrWhiteSpace(refreshToken))
{
return;
}
var queryValues = new Dictionary <string, string>
{
{ "refresh_token", refreshToken },
{ "client_id", Constants.AndroidClientId },
{ "grant_type", "refresh_token" },
{ "client_secret", null },
};
authenticator = new OAuth2Authenticator(
Constants.AndroidClientId,
null,
Constants.Scope,
new Uri(Constants.AuthorizeUrl),
new Uri(Constants.AndroidRedirectUrl),
new Uri(Constants.AccessTokenUrl),
null,
true);
var result = await authenticator.RequestAccessTokenAsync(queryValues);
if (result.ContainsKey("access_token"))
{
account.Properties["access_token"] = result["access_token"];
}
if (result.ContainsKey("refresh_token"))
{
account.Properties["refresh_token"] = result["refresh_token"];
}
//save account to account store
AccountStore.Create().Save(account, Constants.AppName);
await DisplayAlert("Info", "Refresh succeeded", "Ok");
}
catch (Exception ex)
{
await DisplayAlert("Error", "Refresh failed " + ex.Message, "Ok");
}
}
