private void ShareButton_Click(object sender, EventArgs e)
{
try
{
if (SharingList.SelectedIndex == -1)
{
MessageBox.Show("select a user first!");
}
else
{
int nElements = SharingList.SelectedIndices.Count;
int index;
bool IsFolder = CheckPath();
this.Hide();
for (int i = 0; i < nElements; i++)
{
index = SharingList.SelectedIndices[i];
Send(sourcePath, IsFolder, userCollection[index].IP);
}
foreach (Thread t in threadList)
{
t.Join();
}
this.CloseForm();
}
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
settingsForm.BeginInvoke(settingsForm.DownloadStateDelegate, new object[] { "Unable to open the file", true });
this.Close();
}
}
public void Execute()
{
List <Thread> threadList = null;
try
{
//listen local IP:portTCP
serverTCP = new TcpListener(Dns.GetHostAddresses(Dns.GetHostName()).Where(a => a.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork).ToArray()[0], PortTCP);
serverTCP.Start();
//create a list of Threads
threadList = new List <Thread>();
//wait for connection or for closeServerTCP
while (true)
{
while (!serverTCP.Pending() && !closeServerTCP)
{
//check if there are finished thread and remove them
for (int i = 0; i < threadList.Count; i++)
{
if (threadList[i].Join(0))
{
threadList.RemoveAt(i);
i--;
}
}
//wait for 0,1 seconds
Thread.Sleep(100);
}
if (!closeServerTCP && serverTCP.Pending())
{
//received connection request
TcpClient connectedSocket = serverTCP.AcceptTcpClient();
//create thread to receive file
Receiver r = new Receiver(connectedSocket, AutomaticAnswer, PathDest, settingsForm);
Thread t = new Thread(r.Execute);
t.Start();
threadList.Add(t);
}
else if (closeServerTCP)
{
//if closeServerTCP is true exit
break;
}
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
finally {
//stop listening for new client
if (serverTCP != null && serverTCP.Server != null)
{
serverTCP.Stop();
}
//wait all threads
if (threadList != null)
{
threadList.ForEach(x => { x.Join(); });
}
//say to form that you finished (finally)
if (!finalClose)
{
settingsForm.BeginInvoke(settingsForm.CloseThreadDelegate, new object[] { Thread.CurrentThread, Utilities.ServerTCP });
}
}
}
private void ReceiveFile(NetworkStream stream, long fileSize, string fileName)
{
string filepath = null;
ProgressBar progressBarForm = null;
FileStream file = null;
try
{
//set filepath
filepath = string.Concat(pathDest, "\\");
filepath = string.Concat(filepath, fileName);
if (File.Exists(filepath))
{
//ask if the user want to replace the file or create another or cancel
String message = "Do you want to overwrite file?";
String caption = "File already exist";
MessageBoxButtons buttons = MessageBoxButtons.YesNoCancel;
DialogResult result = MessageBox.Show(message, caption, buttons);
if (result == DialogResult.No)
{
//rename file
int i = 1;
String extension = Path.GetExtension(filepath);
String filename = Path.GetFileNameWithoutExtension(filepath);
String tempFilePath = filename + "(" + i + ")";
while (File.Exists(pathDest + "\\" + tempFilePath + extension))
{
i++;
tempFilePath = filename + "(" + i + ")";
}
filepath = pathDest + "\\" + tempFilePath + extension;
}
else if (result == DialogResult.Cancel)
{
return;
}
}
//create file
file = File.Create(filepath);
//set array to receive
byte[] data = new byte[buffer];
int read;
long totRead = 0;
Stopwatch timer;
int percentage = 0;
String remainingSeconds = "";
//set the timer
timer = new Stopwatch();
timer.Start();
int counter = -1;
//create condition vatiable and mutex
Object locker = new Object();
Flag isCreated = new Flag(false);
Flag cancel = new Flag(false);
//create form
progressBarForm = new ProgressBar(isCreated, locker, cancel, "Receiving " + fileName);
Task.Run(() => { progressBarForm.ShowDialog(); });
//wait until form is created
lock (locker)
{
while (isCreated.value() == false)
{
Monitor.Wait(locker);
}
}
Boolean sendingCompleted = true;
//send file
while (fileSize > totRead)
{
lock (locker)
{
//if the cancel button is pressed stop receiving
if (cancel.value() == true)
{
sendingCompleted = false;
break;
}
}
//if byte to be receved are less than buffer size reset the buffer
if (fileSize - totRead < buffer)
{
data = new byte[fileSize - totRead];
}
//read data from stream
read = stream.Read(data, 0, data.Length);
//check if read is 0 (nothing to read or closed connection)
if (read == 0)
{
//delete file and close connection
file.Flush();
file.Close();
File.Delete(filepath);
progressBarForm.BeginInvoke(progressBarForm.closeFormDelegate);
settingsForm.BeginInvoke(settingsForm.DownloadStateDelegate, new object[] { "Connection interrupted by the other user", true });
return;
}
//write data to file
file.Write(data, 0, read);
totRead = totRead + read;
//set remaining time and pecentage once at second
if (counter < (int)timer.Elapsed.TotalSeconds)
{
counter = (int)timer.Elapsed.TotalSeconds;
Utilities.SetPercentage(ref percentage, fileSize, totRead);
Utilities.SetRemainingTime(ref remainingSeconds, timer.Elapsed, fileSize, totRead);
progressBarForm.BeginInvoke(progressBarForm.percentageDelegate, new object[] { percentage });
progressBarForm.BeginInvoke(progressBarForm.timeDelegate, new object[] { new String(remainingSeconds.ToCharArray()) });
}
}
timer.Stop();
if (fileSize != totRead && cancel.value() == false)
{
//errore
Console.WriteLine("ERROR - Receiver.receivefile");
}
//close progressbar, send notification, flush and close fileStream (finally)
progressBarForm.BeginInvoke(progressBarForm.closeFormDelegate);
if (sendingCompleted)
{
settingsForm.BeginInvoke(settingsForm.DownloadStateDelegate, new object[] { "File received correctly", false });
}
file.Flush();
file.Close();
if (!sendingCompleted)
{
File.Delete(filepath);
}
}catch (Exception ex)
{
//delete file and close connection
if (file != null)
{
file.Flush();
file.Close();
File.Delete(filepath);
}
if (progressBarForm != null && progressBarForm.Created)
{
progressBarForm.BeginInvoke(progressBarForm.closeFormDelegate);
}
progressBarForm.BeginInvoke(progressBarForm.closeFormDelegate);
throw ex;
}
}
public void Execute()
{
//if is a folder zip it and send it
if (IsFolder)
{
try
{
//give a not existing name
int c = 0;
String zipName = Path.GetFileName(pathFile) + ".zip";
while (File.Exists(pathFile + "\\..\\" + zipName))
{
c++;
zipName = Path.GetFileName(pathFile) + "(" + c + ").zip";
}
//create zip and change the pathFile
ZipFile.CreateFromDirectory(pathFile, pathFile + "\\..\\" + zipName, CompressionLevel.Optimal, true);
pathFile = pathFile + "\\..\\" + zipName;
}
catch (UnauthorizedAccessException)
{
MessageBox.Show("You do not have the permission to open the folder", "Folder permission error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
catch (DirectoryNotFoundException)
{
MessageBox.Show("Folder do not exist anymore", "Folder not found", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
catch (Exception e) {
Console.WriteLine(e.ToString());
return;
}
}
bool aswerDeclined = false;
try
{
//initialize socket
tcpClient = new TcpClient();
//connect to server
tcpClient.Connect(endPoint.Address, endPoint.Port);
//create request message
int messageSize = 0;
byte[] request = CreateRequestMessage(ref messageSize);
//get network stream
NetworkStream stream = tcpClient.GetStream();
//send request message
stream.Write(request, 0, messageSize);
byte[] answer = new byte[1];
// Read can return anything from 0 to numBytesToRead.
if (stream.Read(answer, 0, 1) == 0)
{
//if no byte is read connenction is closed
settingsForm.BeginInvoke(settingsForm.DownloadStateDelegate, new object[] { "Unable to send or receive message with the server", true });
tcpClient.Close();
return;
}
//check the answer
if (answer[0] == 1)
{
//receiver does want the file
//send the file
SendFile(stream);
}
else
{
aswerDeclined = true;
}
}
catch (Exception e) {
String mx;
if (e is SocketException)
{
mx = "Unable to connect to the server";
}
else if (e is IOException)
{
mx = "Unable to send or receive message with the server";
}
else if (e is SecurityException || e is UnauthorizedAccessException)
{
mx = "Unable to open the file";
}
else if (e is RibbitException)
{
RibbitException ribbitException = (RibbitException)e;
if (ribbitException.Parameter.Equals("File"))
{
mx = "Unable to open the file";
}
else if (ribbitException.Parameter.Equals("Socket"))
{
mx = "Network problems, unable to send the file";
}
else
{
mx = "Unable to send the file";
}
}
else
{
mx = "Unable to send the file";
}
settingsForm.BeginInvoke(settingsForm.DownloadStateDelegate, new object[] { mx, true });
tcpClient.Close();
Console.WriteLine(e.ToString());
return;
}
//close connection
tcpClient.Close();
//if is a folder delete the zip File
if (IsFolder)
{
try {
File.Delete(pathFile);
}
catch (Exception e) {
Console.WriteLine(e.ToString());
}
}
//send notifications
if (sendingCompleted)
{
String msg;
if (aswerDeclined)
{
msg = "Receiver declined your file/folder";
}
else
{
msg = "File sent correctly";
}
settingsForm.BeginInvoke(settingsForm.DownloadStateDelegate, new object[] { msg, false });
}
}
public void Execute()
{
int c = 0;
Boolean repeat = true;
while (repeat)
{
repeat = false;
c++;
try
{
//initialize UdpClient
udpClient = new UdpClient();
//set end point to multicast 239.168.100.2:64537
IPEndPoint endPointUDP = new IPEndPoint(Utilities.multicastEndPoint.Address, Utilities.multicastEndPoint.Port);
while (closeClientUDP == false)
{
//create payload: 4 byte lenght payload 4 byte port n byte name
byte[] nameBytes = Encoding.UTF8.GetBytes(Name);
int nameSize = nameBytes.Length;
int payloadSize = nameSize + 8;
byte[] payload = new byte[payloadSize];
Buffer.BlockCopy(BitConverter.GetBytes(payloadSize), 0, payload, 0, 4); //big/little endian
Buffer.BlockCopy(BitConverter.GetBytes(PortTCP), 0, payload, 4, 4);
Buffer.BlockCopy(nameBytes, 0, payload, 8, nameSize);
if (NetworkInterface.GetIsNetworkAvailable())
{
//send messagge
udpClient.Send(payload, payloadSize, endPointUDP);
}
//sleep for 2 seconds
Thread.Sleep(2000);
}
//close udpclient
udpClient.Close();
//say to form that you finished
if (!finalClose)
{
form.BeginInvoke(form.CloseThreadDelegate, new object[] { Thread.CurrentThread, Utilities.CientUDP });
}
}
catch (SocketException e)
{
//Console.WriteLine(e.ErrorCode);
Console.WriteLine(e.ToString());
if (c < 2)
{
if (udpClient != null && udpClient.Client != null)
{
udpClient.Close();
}
repeat = true;
}
else
{
//say to form that you finished
if (!finalClose)
{
form.BeginInvoke(form.CloseThreadDelegate, new object[] { Thread.CurrentThread, Utilities.CientUDP });
}
if (udpClient != null && udpClient.Client != null)
{
udpClient.Close();
}
}
}
}
}
public void Execute()
{
Thread listManager = null;
try
{
//join muticast and listen at 64537 port
udpServer = new UdpClient(Utilities.multicastEndPoint.Port);
udpServer.JoinMulticastGroup(Utilities.multicastEndPoint.Address);
//create thread to manage userlist
listManager = new Thread(this.ListManager);
listManager.Start();
//wait for data or for closeServerUDP
while (true)
{
while (udpServer.Available == 0 && !closeServerUDP)
{
//wait for 0,1 seconds
Thread.Sleep(100);
}
if (!closeServerUDP && udpServer.Available > 0)
{
//Datagram received and put it into temp list
IPEndPoint RemoteIpEndPoint = new IPEndPoint(0, 0);
byte[] data = udpServer.Receive(ref RemoteIpEndPoint);
queue.Enqueue(new Tuple <byte[], IPEndPoint>(data, RemoteIpEndPoint));
newData.Set();
}
else if (closeServerUDP)
{
//if closeServerUDP is true exit
break;
}
}
//leave multicast group and close udpclient (finally)
udpServer.DropMulticastGroup(Utilities.multicastEndPoint.Address);
udpServer.Close();
//close ListSetter
listManager.Join();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
//close socket
if (udpServer != null && udpServer.Client != null)
{
udpServer.Close();
}
//close listManager
CloseThread();
if (listManager != null)
{
listManager.Join();
}
//say to settingsform that you closed
settingsForm.BeginInvoke(settingsForm.CloseThreadDelegate, new object[] { Thread.CurrentThread, Utilities.ServerUDP });
}
}
