internal async Task <TokenResponse> FetchTokenAsync(string userId, TokenRequest request,
CancellationToken taskCancellationToken)
{
// Add client id and client secret to requests.
request.ClientId = ClientSecrets.ClientId;
request.ClientSecret = ClientSecrets.ClientSecret;
TokenResponseException tokenException = null;
try
{
var tokenResponse = await request.ExecuteAsync
(httpClient, TokenServerUrl, taskCancellationToken, Clock).ConfigureAwait(false);
return(tokenResponse);
}
catch (TokenResponseException ex)
{
// In case there is an exception during getting the token, we delete any user's token information from
// the data store.
tokenException = ex;
}
await DeleteTokenAsync(userId, taskCancellationToken).ConfigureAwait(false);
throw tokenException;
}
/// <summary>
/// Creates an authentication exception from an <see cref="AggregateException"/>.
/// </summary>
/// <param name="e">The aggregate exception from the server.</param>
/// <param name="message">The error message.</param>
/// <returns>The Ads OAuth exception for rethrowing.</returns>
private AdsOAuthException CreateOAuthException(AggregateException e, string message)
{
TokenResponseException innerException = e.InnerExceptions.FirstOrDefault()
as TokenResponseException;
if (innerException != null)
{
return(new AdsOAuthException(message, e, innerException.Error, innerException.StatusCode));
}
else
{
return(new AdsOAuthException($"{message} See inner exception for details.", e));
}
}