private Metadata GetActualMetadata(BlobItem item)
{
// Pass all custom metadata through the converter
var convertedMeta = item.Metadata.ToDictionary(k => k.Key, k => AzureStoreMetadataEncoder.DecodeMetadata(k.Value));
var metadata = new Metadata(convertedMeta);
metadata.StoredLastModified = item.Properties.LastModified.Value.UtcDateTime;
if (!metadata.LastModified.HasValue)
{
metadata.LastModified = metadata.StoredLastModified;
}
metadata.StoredContentLength = item.Properties.ContentLength;
metadata.StoredContentType = item.Properties.ContentType;
metadata.ETag = item.Properties.ETag.ToString();
// Remove the snapshot key at this point if we have it
if (metadata.ContainsKey(InternalSnapshotKey))
{
metadata.Remove(InternalSnapshotKey);
}
// Remove the store key as well...
if (metadata.ContainsKey(StoreVersionKey))
{
metadata.Remove(StoreVersionKey);
}
if (_enableSnapshots && !string.IsNullOrEmpty(item.Snapshot))
{
metadata.Snapshot = item.Snapshot;
}
return(metadata);
}
private async ValueTask <Metadata> GetActualMetadata(BlockBlobClient blob, BlobProperties props, string snapshot)
{
if (props == null)
{
return(null);
}
// Pass all custom metadata through the converter
var convertedMeta = props.Metadata.ToDictionary(k => k.Key, k => AzureStoreMetadataEncoder.DecodeMetadata(k.Value));
var metadata = new Metadata(convertedMeta);
metadata.StoredLastModified = props.LastModified.UtcDateTime;
if (!metadata.LastModified.HasValue)
{
metadata.LastModified = metadata.StoredLastModified;
}
metadata.StoredContentLength = props.ContentLength;
metadata.StoredContentType = props.ContentType;
metadata.ETag = props.ETag.ToString();
// Remove the snapshot key at this point if we have it
if (metadata.ContainsKey(InternalSnapshotKey))
{
metadata.Remove(InternalSnapshotKey);
}
// Remove the store key as well...
if (metadata.ContainsKey(StoreVersionKey))
{
metadata.Remove(StoreVersionKey);
}
if (_enableSnapshots)
{
if (!string.IsNullOrEmpty(snapshot))
{
metadata.Snapshot = snapshot;
}
else if (props.Metadata.ContainsKey(InternalSnapshotKey))
{
// Try and use our save snapshot instead of making more calls...
var date = props.Metadata[InternalSnapshotKey];
if (long.TryParse(date, out var ticks))
{
// This is in old format, convert back to snapshot format date
date = new DateTime(ticks, DateTimeKind.Utc).ToString("o", CultureInfo.InvariantCulture);
}
metadata.Snapshot = date;
}
else
{
// Try and find last snapshot
// Unfortunately we need to make a request since this information isn't on the actual blob that we are working with...
var container = _blobStorage.GetBlobContainerClient(blob.BlobContainerName);
var snapBlob = await ListBlobs(container, blob.Name, BlobTraits.None, BlobStates.Snapshots)
.Where(b => !string.IsNullOrEmpty(b.Snapshot) && b.Name == blob.Name)
.AggregateAsync((BlobItem)null, (a, b) => a == null || b == null ? (a ?? b) : (ParseSnapshotDate(b.Snapshot) > ParseSnapshotDate(b.Snapshot) ? a : b));
metadata.Snapshot = snapBlob?.Snapshot;
}
}
return(metadata);
}