/// <inheritdoc />
public void WriteToStream(uint chunk, byte[] fileBytes)
{
lock (_fileLock)
{
var idx = chunk - 1;
RandomAccessStream.Seek(idx * Constants.FileTransferChunkSize, SeekOrigin.Begin);
RandomAccessStream.Write(fileBytes);
TimeSinceLastChunk = DateTime.Now;
}
}
/// <inheritdoc />
public IMessageDto <ProtocolMessage> GetUploadMessageDto(uint index)
{
var chunkId = index + 1;
var startPos = index * Constants.FileTransferChunkSize;
var endPos = chunkId * Constants.FileTransferChunkSize;
var fileLen = RandomAccessStream.Length;
if (endPos > fileLen)
{
endPos = (uint)fileLen;
}
var bufferSize = (int)(endPos - startPos);
var chunk = new byte[bufferSize];
RandomAccessStream.Seek(startPos, SeekOrigin.Begin);
var readTries = 0;
var bytesRead = 0;
while ((bytesRead += RandomAccessStream.Read(chunk, 0, bufferSize - bytesRead)) < bufferSize)
{
readTries++;
if (readTries >= Constants.FileTransferMaxChunkReadTries)
{
return(null);
}
}
var transferMessage = new TransferFileBytesRequest
{
ChunkBytes = ByteString.CopyFrom(chunk),
ChunkId = chunkId,
CorrelationFileName = CorrelationId.Id.ToByteString()
}.ToProtocolMessage(PeerId);
return(new MessageDto(transferMessage,
RecipientId
));
}