async Task <IDictionary <string, object> > IFileBackend.ChunkedUploadCompleteAsync(
object context,
string uploadKey,
string id,
IChunkStatus[] chunkStatuses,
CancellationToken cancellationToken
)
{
var config = context as Context;
var state = new SequentialState(chunkStatuses.Last().State);
// Decode and remove this drivers layer of SequentialState
for (int i = 0; i < chunkStatuses.Length; i++)
{
chunkStatuses[i].State = new SequentialState(chunkStatuses[i].State).NextDriverState;
}
var values = await config.NextDriver.ChunkedUploadCompleteAsync(
config.NextDriverContext, uploadKey, id, chunkStatuses, cancellationToken
);
values = values ?? new Dictionary <string, object>();
ReportDigestValues(values, state);
return(values);
}
private void ReportDigestValues(IDictionary <string, object> values, SequentialState state)
{
if (state.MD5 != null)
{
values.Add("md5", GetDigestValue(state.MD5));
}
if (state.SHA1 != null)
{
values.Add("sha1", GetDigestValue(state.SHA1));
}
if (state.SHA256 != null)
{
values.Add("sha256", GetDigestValue(state.SHA256));
}
}
async Task <string> IFileBackend.ChunkedUploadChunkAsync(
object context,
string id,
string uploadKey,
string chunkKey,
int chunkIndex,
int totalChunks,
string sequentialState,
long from,
long to,
long totalLength,
Stream stream,
CancellationToken cancellationToken
)
{
var config = context as Context;
var state = new SequentialState(sequentialState);
var digests = PrepareDigests(config, state, isFirstChunk: chunkIndex == 0);
using (var encryptor = new ChunkEncryptorStreamReader(
stream,
config.CryptographyAlgorithm,
from,
to,
totalLength,
digests,
state.IV(),
Logger
))
using (var wrapper = new StreamRequestWrapper(encryptor, encryptor.Length, Logger))
{
state.NextDriverState = await config.NextDriver.ChunkedUploadChunkAsync(
config.NextDriverContext, id, uploadKey, chunkKey, chunkIndex, totalChunks,
state.NextDriverState,
from, to, totalLength, wrapper,
cancellationToken
);
state.IVBase64 = Convert.ToBase64String(encryptor.NextIV());
return(state.ToString());
}
}
private List <GeneralDigest> PrepareDigests(Context config, SequentialState state, bool isFirstChunk)
{
var digests = new List <GeneralDigest>();
if (config.MD5Enabled)
{
digests.Add(state.MD5 = isFirstChunk ? new MD5Digest() : state.MD5);
}
if (config.SHA1Enabled)
{
digests.Add(state.SHA1 = isFirstChunk ? new Sha1Digest() : state.SHA1);
}
if (config.SHA256Enabled)
{
digests.Add(state.SHA256 = isFirstChunk ? new Sha256Digest() : state.SHA256);
}
return(digests);
}