public async static Task <IEnumerable <JObject> > LoadRanges(
HttpSource httpSource,
Uri registrationUri,
string packageId,
VersionRange range,
SourceCacheContext cacheContext,
ILogger log,
CancellationToken token)
{
var packageIdLowerCase = packageId.ToLowerInvariant();
var httpSourceCacheContext = HttpSourceCacheContext.Create(cacheContext, 0);
var index = await httpSource.GetAsync(
new HttpSourceCachedRequest(
registrationUri.OriginalString,
$"list_{packageIdLowerCase}_index",
httpSourceCacheContext)
{
IgnoreNotFounds = true,
},
async httpSourceResult =>
{
return(await httpSourceResult.Stream.AsJObjectAsync(token));
},
log,
token);
if (index == null)
{
// The server returned a 404, the package does not exist
return(Enumerable.Empty <JObject>());
}
IList <Task <JObject> > rangeTasks = new List <Task <JObject> >();
foreach (JObject item in index["items"])
{
var lower = NuGetVersion.Parse(item["lower"].ToString());
var upper = NuGetVersion.Parse(item["upper"].ToString());
if (range.DoesRangeSatisfy(lower, upper))
{
JToken items;
if (!item.TryGetValue("items", out items))
{
var rangeUri = item["@id"].ToString();
rangeTasks.Add(httpSource.GetAsync(
new HttpSourceCachedRequest(
rangeUri,
$"list_{packageIdLowerCase}_range_{lower.ToNormalizedString()}-{upper.ToNormalizedString()}",
httpSourceCacheContext)
{
IgnoreNotFounds = true,
},
async httpSourceResult =>
{
return(await httpSourceResult.Stream.AsJObjectAsync(token));
},
log,
token));
}
else
{
rangeTasks.Add(Task.FromResult(item));
}
}
}
await Task.WhenAll(rangeTasks.ToArray());
return(rangeTasks.Select((t) => t.Result));
}
private async Task <IEnumerable <IPackageSearchMetadata> > GetMetadataAsync(
string packageId,
bool includePrerelease,
bool includeUnlisted,
VersionRange range,
SourceCacheContext sourceCacheContext,
ILogger log,
CancellationToken token)
{
var metadataCache = new MetadataReferenceCache();
var registrationUri = _regResource.GetUri(packageId);
var(registrationIndex, httpSourceCacheContext) = await LoadRegistrationIndexAsync(
_client,
registrationUri,
packageId,
sourceCacheContext,
httpSourceResult => DeserializeStreamDataAsync <RegistrationIndex>(httpSourceResult.Stream, token),
log,
token);
if (registrationIndex == null)
{
// The server returned a 404, the package does not exist
return(Enumerable.Empty <PackageSearchMetadataRegistration>());
}
var results = new List <PackageSearchMetadataRegistration>();
foreach (var registrationPage in registrationIndex.Items)
{
if (registrationPage == null)
{
throw new InvalidDataException(registrationUri.AbsoluteUri);
}
var lower = NuGetVersion.Parse(registrationPage.Lower);
var upper = NuGetVersion.Parse(registrationPage.Upper);
if (range.DoesRangeSatisfy(lower, upper))
{
if (registrationPage.Items == null)
{
var rangeUri = registrationPage.Url;
var leafRegistrationPage = await GetRegistratioIndexPageAsync(_client, rangeUri, packageId, lower, upper, httpSourceCacheContext, log, token);
if (registrationPage == null)
{
throw new InvalidDataException(registrationUri.AbsoluteUri);
}
ProcessRegistrationPage(leafRegistrationPage, results, range, includePrerelease, includeUnlisted, metadataCache);
}
else
{
ProcessRegistrationPage(registrationPage, results, range, includePrerelease, includeUnlisted, metadataCache);
}
}
}
return(results);
}