public async Task <ActionResult <RegistrationIndexResponse> > RegistrationIndexAsync(string id, CancellationToken cancellationToken)
{
var index = await _metadata.GetRegistrationIndexOrNullAsync(id, cancellationToken);
if (index == null)
{
return(NotFound());
}
return(index);
}
private async Task <IReadOnlyList <PackageMetadata> > FindAllUpstreamMetadataOrNull(string id, CancellationToken cancellationToken)
{
var packageIndex = await _upstreamMetadata.GetRegistrationIndexOrNullAsync(id, cancellationToken);
if (packageIndex == null)
{
return(null);
}
var result = new List <PackageMetadata>();
foreach (var page in packageIndex.Pages)
{
cancellationToken.ThrowIfCancellationRequested();
// If the package's registration index is too big, it will be split into registration
// pages stored at different URLs. We will need to fetch each page's items individually.
// We can detect this case as the registration index will have "null" items.
var items = page.ItemsOrNull;
if (items == null)
{
var externalPage = await _upstreamMetadata.GetRegistrationPageOrNullAsync(id, page.Lower, page.Upper, cancellationToken);
if (externalPage == null || externalPage.ItemsOrNull == null)
{
// This should never happen...
_logger.LogError(
"Missing or invalid registration page for {PackageId}, versions {Lower} to {Upper}",
id,
page.Lower,
page.Upper);
continue;
}
items = externalPage.ItemsOrNull;
}
result.AddRange(items.Select(i => i.PackageMetadata));
}
return(result);
}