public 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>
/// Executes the token request in order to receive a
/// <see cref="Google.Apis.Auth.OAuth2.Responses.TokenResponse"/>. In case the token server returns an
/// error, a <see cref="Google.Apis.Auth.OAuth2.Responses.TokenResponseException"/> is thrown.
/// </summary>
/// <param name="request">The token request.</param>
/// <param name="httpClient">The HTTP client used to create an HTTP request.</param>
/// <param name="tokenServerUrl">The token server URL.</param>
/// <param name="taskCancellationToken">Cancellation token to cancel operation.</param>
/// <param name="clock">
/// The clock which is used to set the
/// <see cref="Google.Apis.Auth.OAuth2.Responses.TokenResponse.Issued"/> property.
/// </param>
/// <returns>Token response with the new access token.</returns>
public static Task <TokenResponse> ExecuteAsync(this TokenRequest request, HttpClient httpClient,
string tokenServerUrl, CancellationToken taskCancellationToken, IClock clock) =>
ExecuteAsync(request, httpClient, tokenServerUrl, taskCancellationToken, clock, ApplicationContext.Logger);
