public async Task <RetrieveMetadataResponse> RetrieveStudyInstanceMetadataAsync(string studyInstanceUid, string ifNoneMatch = null, CancellationToken cancellationToken = default)
{
IEnumerable <VersionedInstanceIdentifier> retrieveInstances = await _instanceStore.GetInstancesToRetrieve(
ResourceType.Study,
studyInstanceUid,
seriesInstanceUid : null,
sopInstanceUid : null,
cancellationToken);
string eTag = _eTagGenerator.GetETag(ResourceType.Study, retrieveInstances);
bool isCacheValid = IsCacheValid(eTag, ifNoneMatch);
return(await RetrieveMetadata(retrieveInstances, isCacheValid, eTag, cancellationToken));
}
public async Task <RetrieveResourceResponse> GetInstanceResourceAsync(RetrieveResourceRequest message, CancellationToken cancellationToken)
{
EnsureArg.IsNotNull(message, nameof(message));
try
{
AcceptHeaderDescriptor acceptHeaderDescriptor;
string transferSyntax = _retrieveTransferSyntaxHandler.GetTransferSyntax(message.ResourceType, message.AcceptHeaders, out acceptHeaderDescriptor);
bool isOriginalTransferSyntaxRequested = DicomTransferSyntaxUids.IsOriginalTransferSyntaxRequested(transferSyntax);
IEnumerable <VersionedInstanceIdentifier> retrieveInstances = await _instanceStore.GetInstancesToRetrieve(
message.ResourceType, message.StudyInstanceUid, message.SeriesInstanceUid, message.SopInstanceUid, cancellationToken);
if (!retrieveInstances.Any())
{
throw new InstanceNotFoundException();
}
Stream[] resultStreams = await Task.WhenAll(
retrieveInstances.Select(x => _blobDataStore.GetFileAsync(x, cancellationToken)));
if (message.ResourceType == ResourceType.Frames)
{
return(new RetrieveResourceResponse(
await _frameHandler.GetFramesResourceAsync(
resultStreams.Single(), message.Frames, isOriginalTransferSyntaxRequested, transferSyntax),
acceptHeaderDescriptor.MediaType));
}
else
{
if (!isOriginalTransferSyntaxRequested)
{
resultStreams = await Task.WhenAll(resultStreams.Select(x => _transcoder.TranscodeFileAsync(x, transferSyntax)));
}
resultStreams = resultStreams.Select(stream =>
new LazyTransformReadOnlyStream <Stream>(
stream,
s => ResetDicomFileStream(s))).ToArray();
}
return(new RetrieveResourceResponse(resultStreams, acceptHeaderDescriptor.MediaType));
}
catch (DataStoreException e)
{
// Log request details associated with exception. Note that the details are not for the store call that failed but for the request only.
_logger.LogError(
e,
string.Format(
"Error retrieving dicom resource. StudyInstanceUid: {0} SeriesInstanceUid: {1} SopInstanceUid: {2}",
message.StudyInstanceUid,
message.SeriesInstanceUid,
message.SopInstanceUid));
throw;
}
}