/// <summary>
/// Downloads the manifest for an OCI artifact.
/// </summary>
/// <param name="options">Options for the download operation.</param>
/// <param name="cancellationToken">The cancellation token to use.</param>
/// <returns>The download manifest result.</returns>
public virtual async Task <Response <DownloadManifestResult> > DownloadManifestAsync(DownloadManifestOptions options, CancellationToken cancellationToken = default)
{
Argument.AssertNotNull(options, nameof(options));
using DiagnosticScope scope = _clientDiagnostics.CreateScope($"{nameof(ContainerRegistryBlobClient)}.{nameof(DownloadManifest)}");
scope.Start();
try
{
Response <ManifestWrapper> response = await _restClient.GetManifestAsync(_repositoryName, options.Tag ?? options.Digest, ManifestMediaType.OciManifest.ToString(), cancellationToken).ConfigureAwait(false);
Response rawResponse = response.GetRawResponse();
rawResponse.Headers.TryGetValue("Docker-Content-Digest", out var digest);
if (!ValidateDigest(rawResponse.ContentStream, digest))
{
throw _clientDiagnostics.CreateRequestFailedException(rawResponse,
new ResponseError(null, "The requested digest does not match the digest of the received manifest."));
}
using var document = JsonDocument.Parse(rawResponse.ContentStream);
var manifest = OciManifest.DeserializeOciManifest(document.RootElement);
rawResponse.ContentStream.Position = 0;
return(Response.FromValue(new DownloadManifestResult(digest, manifest, rawResponse.ContentStream), rawResponse));
}
catch (Exception e)
{
scope.Failed(e);
throw;
}
}
private static OciManifest DeserializeManifest(Stream stream)
{
using var document = JsonDocument.Parse(stream);
return(OciManifest.DeserializeOciManifest(document.RootElement));
}