public void HandleTransferAccepted(object sender, EventArgs e)
{
CLanFileTransferRequest req = sender as CLanFileTransferRequest;
CLanFileTransfer cft = new CLanFileTransfer(req.From, req.Files, CLanTransferType.RECEIVE);
cft.Start(); // Start the working thread, that will also ask for the save directory
}
public void OnTransferRemoved(CLanFileTransfer ctf)
{
TransferRemoved?.Invoke(this, ctf);
}
public void ReceiveFiles(CLanFileTransfer cft, string rootFolder)
{
Socket other = cft.currentSocket;
List <CLanFile> files = CLanFile.EnforceDuplicatePolicy(cft.Files, rootFolder);
BackgroundWorker bw = cft.BW;
long totalSize = files.Sum(f => f.Size);
long receivedSize = 0;
byte[] buffer = new byte[BUFFER_SIZE];
Stopwatch sw = Stopwatch.StartNew();
using (other)
{
// Here I already applied the renaming/overwriting policy for duplicate files,
// so I can simply receive them
foreach (CLanFile f in files)
{
if (bw.CancellationPending)
{
break;
}
// Update the View
cft.CurrentFile = f.Name;
long currentReceivedSize = 0;
using (NetworkStream stream = new NetworkStream(other))
using (FileStream fstream = new FileStream(rootFolder + f.Name, FileMode.OpenOrCreate, FileAccess.Write))
{
if (stream.CanRead)
{
int oldProgress = 0;
long oldSecondsLeft = 0;
int timeUpdateCounter = 0;
int timeUpdateStep = 8092;
int progressSteadyStep = 10;
while (currentReceivedSize < f.Size && !bw.CancellationPending)
{
Array.Clear(buffer, 0, BUFFER_SIZE);
int size = stream.Read(buffer, 0, (int)Math.Min(BUFFER_SIZE, f.Size - currentReceivedSize));
if (size <= 0) // I am receiving and the sender closed the transfer
{
break;
}
fstream.Write(buffer, 0, size);
currentReceivedSize += size;
receivedSize += size;
int progress = Convert.ToInt32(Math.Ceiling(Convert.ToDouble(receivedSize) * 100 / Convert.ToDouble(totalSize)));
if (oldProgress != progress)
{
oldProgress = progress;
bw.ReportProgress(progress);
}
if (progress > progressSteadyStep)
{
timeUpdateStep = 1024;
timeUpdateCounter = 0;
}
// Update the time left once any 512 packets (max 512KB) received
if (timeUpdateCounter == 0)
{
long sizeUpToNow = receivedSize;
long timeUpToNow = sw.ElapsedMilliseconds;
long sizeLeft = totalSize - receivedSize;
long timeLeft = (timeUpToNow * sizeLeft) / sizeUpToNow;
long secondsLeft = timeLeft / 1000;
if (oldSecondsLeft != secondsLeft)
{
oldSecondsLeft = secondsLeft;
cft.UpdateTimeLeft(secondsLeft);
}
}
timeUpdateCounter = (timeUpdateCounter++) % timeUpdateStep;
}
}
}
if (bw.CancellationPending)
{
// I am the receiver and I stopped the transfer
// Delete pending file
File.Delete(rootFolder + f.Name);
// It will jump out of the foreach, closing the socket, causing an exception to occur on the other side,
// that will be catched to acknowledged the end of the transfer
break;
}
if (currentReceivedSize != f.Size)
{
// I am the receiver and the sender stopped the transfer
Trace.WriteLine("Transfer was cancelled by the sender");
// Delete pending file
File.Delete(rootFolder + f.Name);
break;
}
Trace.WriteLine("File received");
}
}
}
public void SendFiles(CLanFileTransfer cft)
{
Socket other = cft.currentSocket;
List <CLanFile> files = cft.Files;
BackgroundWorker bw = cft.BW;
long totalSize = files.Sum(f => f.Size);
long sentSize = 0;
byte[] buffer = new byte[BUFFER_SIZE];
Stopwatch sw = Stopwatch.StartNew();
using (other)
{
foreach (CLanFile f in files)
{
if (bw.CancellationPending)
{
break;
}
// Update the View
cft.CurrentFile = f.Name;
long currentSentSize = 0;
using (NetworkStream stream = new NetworkStream(other))
using (FileStream fstream = new FileStream(f.RelativePath, FileMode.Open, FileAccess.Read))
{
try
{
if (stream.CanWrite)
{
int oldProgress = 0;
long oldSecondsLeft = 0;
int timeUpdateCounter = 0;
int timeUpdateStep = 8092;
int progressSteadyStep = 10;
while (currentSentSize < f.Size && !bw.CancellationPending)
{
Array.Clear(buffer, 0, BUFFER_SIZE);
int size = fstream.Read(buffer, 0, BUFFER_SIZE);
stream.Write(buffer, 0, size);
currentSentSize += size;
sentSize += size;
int progress = Convert.ToInt32(Math.Ceiling(Convert.ToDouble(sentSize) * 100 / Convert.ToDouble(totalSize)));
if (oldProgress != progress)
{
oldProgress = progress;
bw.ReportProgress(progress);
}
if (progress > progressSteadyStep)
{
timeUpdateStep = 1024;
timeUpdateCounter = 0;
}
// Update the time left once any 512 packets (max 512KB) sent
if (timeUpdateCounter == 0)
{
long sizeUpToNow = sentSize;
long timeUpToNow = sw.ElapsedMilliseconds;
long sizeLeft = totalSize - sentSize;
long timeLeft = (timeUpToNow * sizeLeft) / sizeUpToNow;
long secondsLeft = timeLeft / 1000;
if (oldSecondsLeft != secondsLeft)
{
oldSecondsLeft = secondsLeft;
cft.UpdateTimeLeft(secondsLeft);
}
}
timeUpdateCounter = (timeUpdateCounter++) % timeUpdateStep;
}
// I am the sender and I stopped the transfer
if (bw.CancellationPending)
{
Trace.WriteLine("Transfer was cancelled by me");
break;
}
}
}
catch (IOException ioe)
{
// I am the sender and the receiver stopped the transfer
Trace.WriteLine("The receiver stopped the transfer");
break;
}
}
}
}
}
