public UserClient(Client networkClient)
{
NetworkClient = networkClient;
LastActivity = DateTime.UtcNow;
Buffer = new MemoryStream(1024);
CurrentTransmitDirection = FileTransmitDirection.None;
}
protected override void OnData(byte[] buffer, int offset, int length, CancellationToken cancellationToken)
{
//Logger.Log(LogType.Debug, "Received {0} bytes", length);
if (length != 0)
{
DataLogger.Log(buffer, offset, length);
}
if (_currentFileTransmission != null &&
_currentTransmitDirection == FileTransmitDirection.Receive)
{
if (_buffer.Length > 0)
{
var len = _buffer.Length;
_buffer.Position = 0;
_buffer.SetLength(0);
OnData(_buffer.GetBuffer(), 0, (int)len, cancellationToken);
if (cancellationToken.IsCancellationRequested)
{
return;
}
}
if (length == 0)
{
return;
}
//Logger.Log(LogType.Debug, "Remaining: {0}", _currentFileTransmission.Remaining);
// we're currently receiving a file
int toWrite = (int)Math.Min(length, _currentFileTransmission.Remaining);
_currentFileTransmission.Write(buffer, offset, toWrite);
//Logger.Log(LogType.Debug, "Wrote {0} bytes - Remaining {1}", toWrite, userClient.FileTransmit.Remaining);
if (_currentFileTransmission.Remaining == 0)
{
_currentFileTransmission.EndReceive();
Logger.Log(LogType.Normal, "File complete: {0}", _currentFileTransmission.RemotePath);
if (_currentFileTransmission.IsFileCorrupted)
{
Logger.Log(LogType.Error, "ERR FILE CORRUPTED => {0}", _currentFileTransmission.RemotePath);
}
_currentFileTransmission.Dispose();
_currentFileTransmission = null;
_currentTransmitDirection = FileTransmitDirection.None;
//CreatePacket(PacketHeader.TransmitComplete).Send(); // notify transmit completed
if ((length - toWrite) > 0)
{
var newBuffer = new byte[length - toWrite];
Buffer.BlockCopy(buffer, offset + toWrite, newBuffer, 0, length - toWrite);
OnData(newBuffer, 0, newBuffer.Length, cancellationToken); // read the remaining data
}
}
return;
}
_buffer.Position = _buffer.Length;
_buffer.Write(buffer, offset, length);
ReadPacketResult result;
do
{
_buffer.Position = 0;
int requestId;
short header;
int dataSize;
switch (result = Utilities.ReadHeader(_buffer, out requestId, out header, out dataSize))
{
case ReadPacketResult.InvalidData:
case ReadPacketResult.DataSizeInvalid:
case ReadPacketResult.InvalidHeader:
case ReadPacketResult.UnexpectedHeaderAtThisPoint:
Logger.Log(
LogType.Warning,
"ReadHeader: {0}",
Enum.GetName(typeof(ReadPacketResult), result));
Utilities.DumpData(_buffer.GetBuffer(), (int)_buffer.Length);
//Close();
return;
case ReadPacketResult.NeedMoreData:
return; // exit out of OnClientData and wait for more data...
}
// call packet methods
MethodInfo methodInfo;
if (!_packetMethods.TryGetValue((PacketHeader)header, out methodInfo))
{
Logger.Log(
LogType.Warning,
"Unknown packet header: 0x{0}",
header.ToString("x4"));
Close();
return;
}
try
{
methodInfo.Invoke(this, new object[] { requestId });
}
catch (TargetInvocationException ex)
{
if (ex.InnerException is DataValidationException)
{
Close(ex.Message);
}
else if (ex.InnerException is FileTransmitBeginException)
{
_buffer.Delete(NetworkStandards.HeaderSize + dataSize);
OnData(new byte[] { }, 0, 0, cancellationToken);
return;
}
}
if (!IsConnected)
{
return;
}
_buffer.Delete(NetworkStandards.HeaderSize + dataSize);
if (cancellationToken.IsCancellationRequested)
{
return;
}
if (_currentTransmitDirection == FileTransmitDirection.Receive)
{
OnData(new byte[] { }, 0, 0, cancellationToken);
return;
}
if (_buffer.Length == 0)
{
break;
}
}while (result == ReadPacketResult.Succeeded);
}
public void TransferFile(string localFilename, string remoteFilename, FileTransmitDirection direction, TimeSpan timeout)
{
if (direction == FileTransmitDirection.Send)
{
var fi = new FileInfo(localFilename);
var succeeded = false;
var crc = new Crc32().ComputeFile(fi.FullName);
using (var request = CreateRequest())
{
CreatePacket(request.Id, PacketHeader.TransferFileRequest)
.Write((byte)1) // send
.Write(remoteFilename)
.Write(fi.Length)
.Write(fi.LastWriteTimeUtc.Ticks)
.Write(crc)
.Send();
if (!WaitForRequest(request, timeout))
{
throw new RequestTimeoutException();
}
succeeded = (bool)request.Data;
}
if (!succeeded)
{
throw new InvalidOperationException("Failed to request to transfer file...");
}
using (var stream = System.IO.File.Open(localFilename, FileMode.Open, FileAccess.Read, FileShare.Read))
{
var pos = 0L;
var buffer = new byte[65536];
while (pos < fi.Length)
{
var read = stream.Read(buffer, 0, (int)Math.Min(buffer.Length, fi.Length - pos));
pos += read;
var sendPos = 0;
while (sendPos < read)
{
var sent = Send(buffer, sendPos, read - sendPos);
if (sent <= 0)
{
throw new Exception("TransferFile Send error. Return value: " + sent);
}
sendPos += sent;
}
}
}
}
else // receive
{
FileRequestResult result;
using (var request = CreateRequest())
{
CreatePacket(request.Id, PacketHeader.TransferFileRequest)
.Write((byte)0) // receive
.Write(remoteFilename)
.Send();
if (!WaitForRequest(request, timeout))
{
throw new RequestTimeoutException();
}
result = (FileRequestResult)request.Data;
}
if (!result.Succeeded)
{
throw new InvalidOperationException("Failed to request to receive file...");
}
// receive data...
_currentTransmitDirection = FileTransmitDirection.Receive;
_currentFileTransmission = FileTransmission.BeginReceive(
localFilename,
remoteFilename,
result.LastWriteTimeUtc,
result.Size,
Path.GetTempFileName(),
result.Crc);
}
}
public override void Process(CancellationToken cancellationToken)
{
base.Process(cancellationToken);
if (!IsConnected)
{
return;
}
int tick = Environment.TickCount;
if (_isAuthorized)
{
if (tick >= _nextSendPing &&
(_currentFileTransmission == null ||
!_currentFileTransmission.IsTransmitting))
{
_nextSendPing = tick + 10000;
CreatePacket(0, PacketHeader.Ping).Send();
}
// check queue
if (_currentFileTransmission != null &&
_currentTransmitDirection == FileTransmitDirection.Send)
{
if (_currentFileTransmission.IsTransmitting)
{
// send chunk...
int toSend = (int)Math.Min(_currentFileTransmission.Remaining, _fileTransmitBuffer.Length);
int numberOfBytesRead = 0;
while (numberOfBytesRead < toSend)
{
numberOfBytesRead += _currentFileTransmission.Read(_fileTransmitBuffer, 0, toSend - numberOfBytesRead);
}
int numberOfBytesSent = 0;
while (numberOfBytesSent < toSend)
{
numberOfBytesSent += Send(_fileTransmitBuffer, 0, toSend - numberOfBytesSent);
}
if (_currentFileTransmission.Remaining == 0)
{
// file upload completed
Logger.Log(LogType.Normal, "Transmit completed.");
_currentFileTransmission.EndTransmit();
_currentFileTransmission.Dispose();
_currentFileTransmission = null;
_currentTransmitDirection = FileTransmitDirection.None;
}
}
}
else if (_fileTransmissionQueue.Count > 0)
{
_currentFileTransmission = _fileTransmissionQueue.Dequeue();
_currentTransmitDirection = FileTransmitDirection.Send;
/*Logger.Log(
* LogType.Debug,
* "Request transmit {0}",
* _currentFileTransmission.LocalPath);*/
CreatePacket(0, PacketHeader.Store)
.Write(_currentFileTransmission.RemotePath)
.Write(_currentFileTransmission.FileSize)
.Write(_currentFileTransmission.FileDateUtc.Ticks)
.Write((int)_currentFileTransmission.RemoteChecksum)
.Send();
}
}
}