/// <summary>
/// Manage the connected client
/// </summary>
/// <param name="result">TCPClient object</param>
/// <returns>Return a task, it is used to allow the Task asynchronous programming model (TAP)</returns>
public async Task ServeClient(object result)
{
NetworkStream stream = null;
TcpClient client = null;
Dictionary <string, FileRecvStatus> updateRecvDictionary = new Dictionary <string, FileRecvStatus>();
Dictionary <string, FileSendStatus> updateSendDictionary = new Dictionary <string, FileSendStatus>();
try {
client = (TcpClient)result;
Console.WriteLine($"{DateTime.Now.ToString()}\t - TCPListener Client connected! {((IPEndPoint)client.Client.RemoteEndPoint).Address.ToString()}");
byte[] bytes = new byte[1 + 256 + 8];
stream = client.GetStream();
int i = 0;
if ((i = await stream.ReadAsync(bytes, 0, bytes.Length)) != 0)
{
// The first byte define the type of the packet
byte[] readPacket = new byte[1];
Array.Copy(bytes, 0, readPacket, 0, 1);
// If it is not correct, send an Exception
if ((int)readPacket[0] > 5)
{
throw new Exception($"Packet not valid");
}
// The following 256 bytes are the name of the file (UTF8 coding)
PacketType type = (PacketType)readPacket[0];
readPacket = new byte[256];
Array.Copy(bytes, 1, readPacket, 0, 256);
string filename = "";
UTF8Encoding encoder;
// Trown an exception in case the sequence of bytes cannot be converted as a stirng
try {
encoder = new UTF8Encoding();
filename = encoder.GetString(readPacket);
filename = filename.Replace("\0", string.Empty);
}
catch (Exception e) {
throw new Exception($"Packet not valid - Reason {e.Message}");
}
long dimFile = 0;
string ipClient = ((IPEndPoint)client.Client.RemoteEndPoint).Address.ToString();
switch (type)
{
case PacketType.RFILE:
if (_referenceData.GetInfoLocalUser().AcceptAllFile)
{
_referenceData.AddOrUpdateRecvStatus(ipClient, filename, FileRecvStatus.YSEND);
await MainWindow.main.Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(() => {
MainWindow.main.AddOrUpdateListFile(ipClient, filename, FileRecvStatus.YSEND, "-", 0.0f);
MainWindow.main.NotifySistem();
MainWindow.main.SendResponse(filename, ipClient, PacketType.YFILE);
}));
}
else
{
_referenceData.AddOrUpdateRecvStatus(ipClient, filename, FileRecvStatus.TOCONF);
await MainWindow.main.Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(() => {
MainWindow.main.AddOrUpdateListFile(ipClient, filename, FileRecvStatus.TOCONF, "-", 0.0f);
MainWindow.main.NotifySistem();
}));
}
break;
case PacketType.YFILE:
if (_referenceData.UpdateSendStatusFileForUser(ipClient, filename, FileSendStatus.CONFERMED))
{
await MainWindow.main.Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(() => {
MainWindow.main.AddOrUpdateListFile(ipClient, filename, FileSendStatus.CONFERMED, "-", 0);
MainWindow.main.SendFile(filename, ipClient);
}));
}
else
{
throw new Exception("No file with name " + filename + " was announced from this client");
}
break;
case PacketType.NFILE:
if (_referenceData.UpdateSendStatusFileForUser(ipClient, filename, FileSendStatus.REJECTED))
{
await MainWindow.main.Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(() => {
MainWindow.main.AddOrUpdateListFile(ipClient, filename, FileSendStatus.REJECTED, "-", 0);
MainWindow.main.SendFile(filename, ipClient);
}));
}
else
{
throw new Exception("No file with name " + filename + " was announced from this client");
}
break;
case PacketType.FSEND:
{
if (_referenceData.CheckPacketRecvFileStatus(ipClient, filename))
{
throw new Exception("File with name " + filename + " never confirmed or need to be resend to the user");
}
string fileNameOriginal = filename;
readPacket = new byte[8];
Array.Copy(bytes, 257, readPacket, 0, 8);
try {
dimFile = BitConverter.ToInt64(readPacket, 0);
}
catch (Exception e) {
throw new Exception($"Packet not valid - Reason {e.Message}");
}
await ServeReceiveFile(client, stream, ipClient, filename, dimFile);
}
break;
case PacketType.CIMAGE:
readPacket = new byte[8];
Array.Copy(bytes, 257, readPacket, 0, 8);
try {
dimFile = BitConverter.ToInt64(readPacket, 0);
}
catch (Exception e) {
throw new Exception($"Packet not valid - Reason {e.Message}");
}
await ServeReceiveProfileImage(client, stream, ipClient, filename, dimFile);
break;
}
}
}
catch (SocketException e) {
Console.WriteLine($"{DateTime.Now.ToString()}\t - Serve TCPClient SocketException - {e.Message}");
}
catch (Exception e) {
Console.WriteLine($"{DateTime.Now.ToString()}\t - Serve TCPClient Exception - {e.GetType()} {e.Message}");
}
finally {
stream.Close();
client.Close();
}
}
