private async Task <AccessToken> GetTokenAsync(bool isAsync, TokenRequestContext requestContext, CancellationToken cancellationToken)
{
using CredentialDiagnosticScope scope = _pipeline.StartGetTokenScope("Azure.Identity.DefaultAcureCredential.GetToken", requestContext);
List <Exception> exceptions = new List <Exception>();
int i;
for (i = 0; i < _sources.Length && _sources[i] != null; i++)
{
ExtendedAccessToken exToken = isAsync ? await _sources[i].GetTokenAsync(requestContext, cancellationToken).ConfigureAwait(false) : _sources[i].GetToken(requestContext, cancellationToken);
if (exToken.Exception is null)
{
return(scope.Succeeded(exToken.AccessToken));
}
if (exToken.Exception is CredentialUnavailableException)
{
exceptions.Add(exToken.Exception);
}
else
{
exceptions.Add(exToken.Exception);
throw scope.Failed(AuthenticationFailedException.CreateAggregateException($"{UnhandledExceptionMessage} {_sources[i].GetType().Name} failed with unhandled exception {exToken.Exception.Message}.", new ReadOnlyMemory <object>(_sources, 0, i + 1), exceptions));
}
}
throw scope.Failed(AuthenticationFailedException.CreateAggregateException(DefaultExceptionMessage, new ReadOnlyMemory <object>(_sources, 0, i), exceptions));
}
/// <summary>
/// Sequentially calls <see cref="TokenCredential.GetToken"/> on all the specified sources, returning the first successfully obtained <see cref="AccessToken"/>. This method is called by Azure SDK clients. It isn't intended for use in application code.
/// </summary>
/// <param name="requestContext">The details of the authentication request.</param>
/// <param name="cancellationToken">A <see cref="CancellationToken"/> controlling the request lifetime.</param>
/// <returns>The first <see cref="AccessToken"/> returned by the specified sources. Any credential which raises a <see cref="CredentialUnavailableException"/> will be skipped.</returns>
public override async ValueTask <AccessToken> GetTokenAsync(TokenRequestContext requestContext, CancellationToken cancellationToken = default)
{
List <Exception> exceptions = new List <Exception>();
for (int i = 0; i < _sources.Length; i++)
{
try
{
return(await _sources[i].GetTokenAsync(requestContext, cancellationToken).ConfigureAwait(false));
}
catch (CredentialUnavailableException e)
{
exceptions.Add(e);
}
catch (Exception e) when(!(e is OperationCanceledException))
{
exceptions.Add(e);
throw AuthenticationFailedException.CreateAggregateException(AggregateCredentialFailedErrorMessage + e.Message, new ReadOnlyMemory <object>(_sources, 0, i + 1), exceptions);
}
}
throw AuthenticationFailedException.CreateAggregateException(AggregateAllUnavailableErrorMessage, _sources, exceptions);
}
/// <summary>
/// Sequentially calls <see cref="TokenCredential.GetToken"/> on all the specified sources, returning the first successfully obtained <see cref="AccessToken"/>. This method is called by Azure SDK clients. It isn't intended for use in application code.
/// </summary>
/// <param name="requestContext">The details of the authentication request.</param>
/// <param name="cancellationToken">A <see cref="CancellationToken"/> controlling the request lifetime.</param>
/// <returns>The first <see cref="AccessToken"/> returned by the specified sources. Any credential which raises a <see cref="CredentialUnavailableException"/> will be skipped.</returns>
public override AccessToken GetToken(TokenRequestContext requestContext, CancellationToken cancellationToken = default)
{
List <Exception> exceptions = new List <Exception>();
for (int i = 0; i < _sources.Length; i++)
{
try
{
return(_sources[i].GetToken(requestContext, cancellationToken));
}
catch (CredentialUnavailableException e)
{
exceptions.Add(e);
}
catch (Exception e) when(!(e is OperationCanceledException))
{
exceptions.Add(e);
throw AuthenticationFailedException.CreateAggregateException(AggregateCredentialFailedErrorMessage + e.Message, exceptions);
}
}
throw AuthenticationFailedException.CreateAggregateException(AggregateAllUnavailableErrorMessage, exceptions);
}
