protected void BlobStreamStore(Guid id, Stream stream)
{
var blob = Provider.BlobRetrieve(id);
if (blob.StorageKey != null)
{
List<BlobPart> existingParts;
using (var partStream = StorageAdapter.Read(blob.StorageKey))
{
existingParts =
JsonSerializer.Deserialize<List<BlobPart>>(
new JsonTextReader(new StreamReader(partStream)));
}
if (existingParts == null)
throw new ApplicationException("Could not deserialize existing parts");
bool success = existingParts.Aggregate(true,
(current, part) => current & StorageAdapter.Delete(part.ExternalStorageKey));
if (!success)
throw new ApplicationException("Could not clean up existing parts");
}
using (var streamPartsStream = StreamUtility.GetTempFileStream())
using (var streamWriter = new StreamWriter(streamPartsStream))
{
var streamParts = StreamUtility.SplitStream(stream, Config.StorageBlobChunkSize,
(streamChunk, checkSum, partId) =>
{
BlobPart part = new BlobPart();
part.Part = partId;
part.CheckSum = checkSum;
part.ExternalStorageKey = StorageAdapter.Create(streamChunk);
return part;
});
JsonSerializer.Serialize(streamWriter, streamParts);
streamWriter.Flush();
streamPartsStream.Position = 0;
blob.StorageKey = StorageAdapter.Create(streamPartsStream);
Provider.BlobUpdate(blob);
}
}
public bool PutData(IUser user, Guid id, HttpRequestMessage request)
{
LogVerbose("BlobDataPut entering.");
LogDebug(String.Format("id = '{0}'", id));
if (!IsAdministrator(user) && !IsBlobOwned(user, id))
throw new UnauthorizedAccessException();
var blob = Provider.BlobRetrieve(id);
if (blob.StorageKey != null)
{
LogDebug(string.Format("Existing StorageKey: {0}", blob.StorageKey));
List<BlobPart> existingParts;
using (var partStream = StorageAdapter.Read(blob.StorageKey))
{
existingParts = JsonSerializer.Deserialize<List<BlobPart>>(new JsonTextReader(new StreamReader(partStream)));
}
if (existingParts == null)
throw new ApplicationException("Could not deserialize existing parts");
bool success = existingParts.Aggregate(true, (current, part) => current & StorageAdapter.Delete(part.ExternalStorageKey));
if (!success)
throw new ApplicationException("Could not clean up existing parts");
}
using (var streamPartsStream = StreamUtility.GetTempFileStream())
using (var streamWriter = new StreamWriter(streamPartsStream))
{
LogDebug("Starting stream splitter");
List<BlobPart> streamParts;
try
{
streamParts = StreamUtility.SplitStream(HttpContext.Request.Body,
Config.StorageBlobChunkSize,
(streamChunk, checkSum, partId) =>
{
LogVerbose(string.Format("Storing StreamChunk for BlobPartId: {0}", partId));
BlobPart part = new BlobPart();
part.Part = partId;
part.CheckSum = checkSum;
part.ExternalStorageKey = StorageAdapter.Create(streamChunk);
LogDebug(string.Format("BlobPart: {0}", part.ToString()));
return part;
}, LogDebug);
}
catch (Exception ex)
{
LogError("Could not split stream.", ex);
throw;
}
JsonSerializer.Serialize(streamWriter, streamParts);
streamWriter.Flush();
streamPartsStream.Position = 0;
blob.StorageKey = StorageAdapter.Create(streamPartsStream);
LogVerbose("PutData leaving.");
return Provider.BlobUpdate(blob);
}
}