public async Task <FeedVerificationResult> VerifyFeedAsync(string source, bool authenticateIfRequired = false, CancellationToken cancellationToken = default)
{
Argument.IsNotNull(() => source);
var result = FeedVerificationResult.Valid;
StringBuilder errorMessage = new StringBuilder($"Failed to verify feed '{source}'");
Log.Debug("Verifying feed '{0}'", source);
try
{
var packageSource = new PackageSource(source);
var repository = _repositoryProvider.CreateRepository(packageSource);
try
{
var searchResource = await repository.GetResourceAsync <PackageSearchResource>();
var metadata = await searchResource.SearchAsync(string.Empty, new SearchFilter(false), 0, 1, _nugetLogger, cancellationToken);
}
catch (Exception)
{
throw;
}
}
catch (FatalProtocolException ex)
{
if (cancellationToken.IsCancellationRequested)
{
//cancel operation
throw new OperationCanceledException("Verification was canceled", ex, cancellationToken);
}
result = FatalProtocolExceptionHandler.HandleException(ex, source);
}
catch (WebException ex)
{
result = WebExceptionHandler.HandleException(ex, source);
}
catch (UriFormatException ex)
{
errorMessage.Append(", a UriFormatException occurred");
Log.Debug(ex, errorMessage.ToString());
result = FeedVerificationResult.Invalid;
}
catch (Exception ex) when(!cancellationToken.IsCancellationRequested)
{
Log.Debug(ex, errorMessage.ToString());
result = FeedVerificationResult.Invalid;
}
Log.Debug("Verified feed '{0}', result is '{1}'", source, result);
return(result);
}
public FeedVerificationResult HandleException(FatalProtocolException exception, string source)
{
try
{
var innerException = exception.InnerException;
if (innerException is null)
{
//handle based on protocol error messages
if (exception.HidesUnauthorizedError())
{
return(FeedVerificationResult.AuthenticationRequired);
}
if (exception.HidesForbiddenError())
{
return(FeedVerificationResult.AuthorizationRequired);
}
}
else
{
if (innerException is WebException)
{
WebExceptionHandler.HandleException(innerException as WebException, source);
}
}
}
catch (Exception ex)
{
Log.Debug(ex, "Failed to verify feed '{0}'", source);
}
return(FeedVerificationResult.Invalid);
}
