private void FinalizeTransfer(string trId, FileTransferState newState)
{
TransferItem finalizingTransfer =
incoming.GetTransferItem(trId) == null?outgoing.GetTransferItem(trId) : incoming.GetTransferItem(trId);
FinalizeTransfer(finalizingTransfer, newState);
}
// DFT:TransferID:Data
private void ProcessIncomingDataFrame(string commandText)
{
byte[] buf;
string[] commandParts = commandText.Split(TRANSFERS_COMMAND_SEPARATOR.ToCharArray());
TransferItem fileTransfer = incoming.GetTransferItem(commandParts[0]);
if (fileTransfer == null)
{
StopTransfer(commandParts[0], FileTransferState.StoppedByError, false);
return;
}
try
{
buf = Convert.FromBase64String(commandParts[1]);
fileStreams[fileTransfer.TrId].Write(buf, 0, buf.Length);
fileStreams[fileTransfer.TrId].Flush();
}
catch (Exception ex)
{
if (ex is ArgumentNullException || ex is FormatException || ex is IOException || ex is ObjectDisposedException)
{
StopTransfer(fileTransfer.TrId, FileTransferState.StoppedByError, false);
return;
}
else
{
throw;
}
}
incoming.CurrentFile = fileTransfer;
fileTransfer.TransferedBytes += buf.Length;
incoming.TransferedBytes += buf.Length;
SendAcknowledgement(fileTransfer.TrId);
if (fileTransfer.TransferedBytes >= fileTransfer.FileSize)
{
fileStreams[fileTransfer.TrId].Close();
if (incoming.CurrentIndex != incoming.MaxIndex)
{
incoming.CurrentIndex++;
}
if (Helpers.GetMD5HashFromFile(fileTransfer.FilePath) != fileTransfer.FileMD5)
{
StopTransfer(fileTransfer.TrId, FileTransferState.Corrupted, false);
}
else
{
FinalizeTransfer(fileTransfer, fileTransfer.State = FileTransferState.SuccessfullyEnded);
}
}
}
// RAC:TransferID
private void StartOutgoingTransfer(string commandText, string receiverURI)
{
string[] commandParts = commandText.Split(TRANSFERS_COMMAND_SEPARATOR.ToCharArray());
TransferItem fileTransfer = outgoing.GetTransferItem(commandParts[0]);
fileStreams.Add(fileTransfer.TrId, new FileStream(fileTransfer.FilePath, FileMode.Open, FileAccess.Read));
fileTransfer.State = FileTransferState.Accepted;
fileTransfer.OtherSideURI = receiverURI;
outgoing.TotalBytes += fileTransfer.FileSize;
if (outgoing.Files.FirstOrDefault(x => x.State == FileTransferState.Active) == null)
{
fileTransfer.State = FileTransferState.Active;
ProcessContinueTransfer(fileTransfer.TrId);
}
}
// GDF:TransferID
private void ProcessContinueTransfer(string trID)
{
int readBytes;
byte[] buf;
string base64Buf;
TransferItem fileTransfer = outgoing.GetTransferItem(trID);
if (fileTransfer == null)
{
StopTransfer(trID, FileTransferState.StoppedByError, true);
return;
}
outgoing.TransferedBytes += fileStreams[fileTransfer.TrId].Position - fileTransfer.TransferedBytes;
fileTransfer.TransferedBytes = fileStreams[fileTransfer.TrId].Position;
if (fileStreams[fileTransfer.TrId].Position < fileStreams[fileTransfer.TrId].Length)
{
buf = new byte[DATA_FRAME_SIZE];
try
{
readBytes = fileStreams[fileTransfer.TrId].Read(buf, 0, buf.Length);
}
catch (IOException)
{
StopTransfer(fileTransfer.TrId, FileTransferState.StoppedByError, true);
SwitchToActiveTransfer();
return;
}
base64Buf = Convert.ToBase64String(buf, 0, readBytes);
// DFT:TransferID:Data
SendData(TransferCommands.DataFrameTansfer + TRANSFERS_COMMAND_SEPARATOR +
fileTransfer.TrId.ToString() + TRANSFERS_COMMAND_SEPARATOR + base64Buf);
outgoing.CurrentFile = fileTransfer;
}
else
{
FinalizeTransfer(fileTransfer, FileTransferState.SuccessfullyEnded);
SwitchToActiveTransfer();
}
}
private void SwitchToActiveTransfer()
{
//* If we already have an active transfer, do nothing.
TransferItem tempItem = outgoing.Files.FirstOrDefault(x => x.State == FileTransferState.Active) as TransferItem;
if (tempItem != null)
{
return;
}
tempItem = outgoing.Files.FirstOrDefault(x => x.State == FileTransferState.Accepted) as TransferItem;
if (tempItem != null)
{
tempItem.State = FileTransferState.Active;
outgoing.CurrentIndex++;
ProcessContinueTransfer(tempItem.TrId);
}
}
private void FinalizeTransfer(TransferItem finalizingTransfer, FileTransferState newState)
{
if (finalizingTransfer == null)
{
return;
}
if (finalizingTransfer.State != newState)
{
finalizingTransfer.State = newState;
}
if (fileStreams.ContainsKey(finalizingTransfer.TrId) && fileStreams[finalizingTransfer.TrId] != null)
{
fileStreams[finalizingTransfer.TrId].Close();
}
fileStreams.Remove(finalizingTransfer.TrId);
incoming.RemoveTransferItem(finalizingTransfer);
outgoing.RemoveTransferItem(finalizingTransfer);
if (incoming.Files.Count == 0)
{
incoming.Initialize();
}
if (outgoing.Files.Count == 0)
{
outgoing.Initialize();
}
List <ITransferItem> tempList = new List <ITransferItem>();
tempList.Add(finalizingTransfer);
OnTransferEnded(new TransfersManagerEventArgs(tempList, finalizingTransfer.OtherSideURI));
}
// TRQ:TransfersNumber:TransferID:FileName:FileSize:MD5:...
private void ProcessIncomingTransfer(string commandText, string fromURI)
{
int c;
List <ITransferItem> requestedFiles = new List <ITransferItem>();
string[] commandParts = commandText.Split(TRANSFERS_COMMAND_SEPARATOR.ToCharArray());
for (c = 0; c < Int32.Parse(commandParts[0]); c++)
{
TransferItem newTransfer = new TransferItem(session);
newTransfer.State = FileTransferState.Requested;
newTransfer.TrId = commandParts[c * 4 + 1];
newTransfer.FileName = commandParts[c * 4 + 2];
newTransfer.FileSize = Int32.Parse(commandParts[c * 4 + 3]);
newTransfer.FileMD5 = commandParts[c * 4 + 4];
newTransfer.FilePath = newTransfer.FileName;
newTransfer.OtherSideURI = fromURI;
fileStreams[newTransfer.TrId] = null;
incoming.AddTransferItem(newTransfer);
requestedFiles.Add(newTransfer);
}
OnIncomingTransferRequest(new TransfersManagerEventArgs(requestedFiles, fromURI));
}
public void RemoveTransferItem(TransferItem item)
{
files.Remove(item);
}
public void AddTransferItem(TransferItem item)
{
files.Add(item);
MaxIndex++;
}
public void Send(string[] filesList)
{
string tempMD5;
FileInfo fi;
TransferItem tempItem;
List <ITransferItem> errorList = new List <ITransferItem>();
List <ITransferItem> sentList = new List <ITransferItem>();
var remoteReceiver = this.session.ParticipantLogs.FirstOrDefault(x => x.IsLocal == false);
string otherSideUri = "";
if (remoteReceiver != null)
{
otherSideUri = remoteReceiver.Uri;
}
string bufRequestCommand = TransferCommands.TransferRequest + TRANSFERS_COMMAND_SEPARATOR +
filesList.Length + TRANSFERS_COMMAND_SEPARATOR;
foreach (string filePath in filesList)
{
tempItem = new TransferItem(this.session);
tempItem.TrId = Guid.NewGuid().ToString();
tempItem.FileName = System.IO.Path.GetFileName(filePath);
tempItem.FilePath = filePath;
tempItem.OtherSideURI = otherSideUri;
outgoing.AddTransferItem(tempItem);
if (!Helpers.CheckFileAvailability(filePath, false))
{
errorList.Add(tempItem);
continue;
}
tempMD5 = Helpers.GetMD5HashFromFile(filePath);
fi = new FileInfo(filePath);
tempItem.FileSize = fi.Length;
tempItem.FileMD5 = tempMD5;
bufRequestCommand += tempItem.TrId + TRANSFERS_COMMAND_SEPARATOR + tempItem.FileName +
TRANSFERS_COMMAND_SEPARATOR + tempItem.FileSize + TRANSFERS_COMMAND_SEPARATOR +
tempItem.FileMD5 + TRANSFERS_COMMAND_SEPARATOR;
sentList.Add(tempItem);
}
if (errorList.Count > 0)
{
OnTransferError(new TransferErrorEventArgs(errorList, errorList.First().OtherSideURI, FileTransferState.ErrorDuringCreation, true));
foreach (ITransferItem ErrorItem in errorList)
{
FinalizeTransfer(ErrorItem.TrId, FileTransferState.ErrorDuringCreation);
}
outgoing.MaxIndex--;
}
if (errorList.Count == filesList.Count())
{
bufRequestCommand = "";
}
if (!string.IsNullOrEmpty(bufRequestCommand))
{
SendData(bufRequestCommand);
if (OutgoingTransfer != null)
{
OutgoingTransfer(this, new TransfersManagerEventArgs(sentList, otherSideUri));
}
}
}
