public void SendFile()
{
int bytesRead = 0;
long len = new FileInfo(_filePath).Length;
DtmFileInfoSruct flHdr = new DtmFileInfoSruct(_filePath, len, 0);
int ckSize = _clientSocket.SendBufferSize - (flHdr.GetHeaderSize() + DtmPacketStruct.GetHeaderSize());
byte[] inputBuffer = new byte[ckSize];
try
{
using (FileStream inStream = new FileStream(_filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
{
// loop through file
while ((bytesRead = inStream.Read(inputBuffer, 0, ckSize)) > 0)
{
// wrap in a file info; option flag is used for payload length
flHdr.OptionsFlag = bytesRead;
byte[] hdrArr = flHdr.ToBytes();
// add data
if (bytesRead == ckSize)
{
hdrArr = ArrayUtils.Concat(hdrArr, inputBuffer);
}
else
{
hdrArr = ArrayUtils.Concat(hdrArr, ArrayUtils.GetRange(inputBuffer, 0, bytesRead));
}
// encrypt the header and data
byte[] enc = SymmetricTransform(_fileSymProcessor, hdrArr);
// send to the remote host
Transmit(DtmPacketFlags.Transfer, (short)DtmTransferFlags.DataChunk, _fileId, new MemoryStream(enc));
// increment counter
_bytesSent += bytesRead;
// progress
if (ProgressPercent != null)
{
double progress = 100.0 * (double)_bytesSent / inStream.Length;
ProgressPercent(this, new System.ComponentModel.ProgressChangedEventArgs((int)progress, (object)inStream.Length));
}
}
}
// notify app
if (FileTransferred != null)
{
FileTransferred(this, new DtmPacketArgs((short)DtmTransferFlags.Sent, _fileId));
}
}
catch (Exception ex)
{
throw new CryptoFileTransferException("DtmFileTransfer:SendFile", "The file transfer did not complete!", ex);
}
finally
{
// flush
SendFlush();
}
}
private void Receive(Stream PacketStream)
{
// get the packet header
DtmPacketStruct prcPacket = new DtmPacketStruct(PacketStream);
// read the packet
byte[] enc = new byte[prcPacket.PayloadLength];
// get the encrypted data
PacketStream.Read(enc, 0, enc.Length);
// decrypt it using file crypto processor
byte[] dec = SymmetricTransform(_fileSymProcessor, enc);
// get file info header
DtmFileInfoSruct pktFi = new DtmFileInfoSruct(dec);
// store file name and size
string fileName = pktFi.FileName;
long fileSize = pktFi.FileSize;
long streamLen = 0;
try
{
using (FileStream outStream = new FileStream(_tempPath, FileMode.Append, FileAccess.Write, FileShare.Read))
{
// calculate offsets
int hdrSize = pktFi.GetHeaderSize();
int len = dec.Length - hdrSize;
// write to file
outStream.Write(ArrayUtils.GetRange(dec, hdrSize, len), 0, len);
// store length
streamLen = outStream.Length;
// progress
if (ProgressPercent != null)
{
double progress = 100.0 * (double)pktFi.OptionsFlag / fileSize;
ProgressPercent(this, new System.ComponentModel.ProgressChangedEventArgs((int)progress, (object)fileSize));
}
}
// transfer completed
if (streamLen == fileSize)
{
// reset attributes
File.SetAttributes(_tempPath, File.GetAttributes(_tempPath) & ~FileAttributes.Hidden);
// rename the file
File.Move(_tempPath, VTDev.Libraries.CEXEngine.Tools.FileTools.GetUniqueName(_filePath));
// notify app
if (FileTransferred != null)
{
FileTransferred(this, new DtmPacketArgs((short)DtmTransferFlags.Received, prcPacket.OptionFlag));
}
// flush and close
ReceiveClose();
}
}
catch (Exception ex)
{
throw new CryptoFileTransferException("DtmFileTransfer:Receive", "The file transfer did not complete!", ex);
}
}
