private void ReceiveFromSocket(Socket handler)
{
handler.ReceiveTimeout = 2500;
handler.SendTimeout = 2500;
string zipLocation = String.Empty, fileNameString = String.Empty, ipSender = String.Empty, id = String.Empty;
ZipArchive archive = null;
long temp = 0;
long zipFileSize = 0;
FileStream fs = null;
string user = String.Empty;
bool zipToDelete = true;
try
{
int received = 0;
ipSender = ((IPEndPoint)handler.RemoteEndPoint).Address.ToString();
user = NeighborProtocol.GetInstance.GetUserFromIp(ipSender);
if (String.IsNullOrEmpty(user))
{
user = Constants.UTENTE_ANONIMO;
}
byte[] command = new byte[Constants.FILE_COMMAND.Length];
received = handler.Receive(command, 0, command.Length, SocketFlags.None, out SocketError sockError);
if (sockError != SocketError.Success)
{
throw new SocketException();
}
string commandString = Encoding.ASCII.GetString(command);
byte[] fileNameLength = new byte[sizeof(int)];
received = handler.Receive(fileNameLength, 0, sizeof(int), SocketFlags.None, out sockError);
if (sockError != SocketError.Success)
{
throw new SocketException();
}
int fileNameDimension = BitConverter.ToInt32(fileNameLength, 0);
byte[] fileNameAndFileLength = new byte[fileNameDimension + sizeof(long)];
received = handler.Receive(fileNameAndFileLength, 0, fileNameAndFileLength.Length, SocketFlags.None, out sockError);
if (sockError != SocketError.Success)
{
throw new SocketException();
}
fileNameString = Encoding.UTF8.GetString(fileNameAndFileLength, 0, fileNameDimension);
long fileSize = BitConverter.ToInt64(fileNameAndFileLength, fileNameDimension);
id = Guid.NewGuid().ToString();
if (settings.AutoAccept)
{
byte[] responseClient = Encoding.ASCII.GetBytes(Constants.ACCEPT_FILE);
handler.Send(responseClient, 0, responseClient.Length, SocketFlags.None, out sockError);
if (sockError != SocketError.Success)
{
throw new SocketException();
}
}
else
{
byte[] responseToClient = new byte[Constants.ACCEPT_FILE.Length];
string adjustedSize = SizeSuffix(fileSize);
Acceptance?.Invoke(user, fileNameString, adjustedSize, id);
while (mre.WaitOne())
{
if (String.Compare(Receiver.idFileToAccept, id) == 0)
{
break;
}
}
if (Receiver.accepted)
{
responseToClient = Encoding.ASCII.GetBytes(Constants.ACCEPT_FILE);
handler.Send(responseToClient, 0, responseToClient.Length, SocketFlags.None, out sockError);
if (sockError != SocketError.Success)
{
throw new SocketException();
}
}
else if (!Receiver.accepted)
{
responseToClient = Encoding.ASCII.GetBytes(Constants.DECLINE_FILE);
handler.Send(responseToClient, 0, responseToClient.Length, SocketFlags.None, out sockError);
if (sockError != SocketError.Success)
{
throw new SocketException();
}
ReleaseResources(handler);
return;
}
}
byte[] zipCommandZipNameLength = new byte[Constants.ZIP_COMMAND.Length + sizeof(int)];
received = handler.Receive(zipCommandZipNameLength, 0, zipCommandZipNameLength.Length, SocketFlags.None, out sockError);
if (sockError != SocketError.Success || received == 0)
{
throw new SocketException();
}
int zipFileNameLength = BitConverter.ToInt32(zipCommandZipNameLength, Constants.ZIP_COMMAND.Length);
byte[] zipNameAndZipLength = new byte[zipFileNameLength + sizeof(long)];
received = handler.Receive(zipNameAndZipLength, 0, zipNameAndZipLength.Length, SocketFlags.None, out sockError);
if (sockError != SocketError.Success)
{
throw new SocketException();
}
string zipFileName = Encoding.ASCII.GetString(zipNameAndZipLength, 0, zipFileNameLength);
zipLocation = App.defaultFolder + "\\" + zipFileName;
if (File.Exists(zipLocation))
{
zipToDelete = false;
handler.Send(Encoding.ASCII.GetBytes(Constants.DECLINE_FILE), 0, Constants.DECLINE_FILE.Length, SocketFlags.None, out sockError);
if (sockError != SocketError.Success)
{
throw new SocketException();
}
return;
}
handler.Send(Encoding.ASCII.GetBytes(Constants.ACCEPT_FILE), 0, Constants.ACCEPT_FILE.Length, SocketFlags.None, out sockError);
if (sockError != SocketError.Success)
{
throw new SocketException();
}
fs = new FileStream(zipLocation, FileMode.Create, FileAccess.Write);
string senderID = user + "@" + ipSender;
if (!NeighborProtocol.GetInstance.Neighbors.TryGetValue(senderID, out Neighbor neighbor))
{
neighbor = new Neighbor(senderID, File.ReadAllBytes(App.currentDirectoryResources + "/anonimo.png"));
}
ReceivingFile rf1 = new ReceivingFile(neighbor, fileNameString, id);
UpdateReceivingFiles?.Invoke(rf1);
zipFileSize = BitConverter.ToInt64(zipNameAndZipLength, zipFileNameLength);
int percentage = 0;
byte[] data = new byte[Constants.PACKET_SIZE];
int bytesRec = 0;
while (temp < zipFileSize)
{
if (zipFileSize - temp > Constants.PACKET_SIZE)
{
bytesRec = handler.Receive(data, 0, Constants.PACKET_SIZE, SocketFlags.None, out sockError);
}
else
{
bytesRec = handler.Receive(data, 0, (int)(zipFileSize - temp), SocketFlags.None, out sockError);
}
if (sockError == SocketError.Success)
{
temp += bytesRec;
fs.Write(data, 0, bytesRec);
fs.Flush();
ulong temporary = (ulong)temp * 100;
int tempPercentage = (int)(temporary / (ulong)zipFileSize);
if (tempPercentage > percentage)
{
UpdateProgress?.Invoke(id, tempPercentage);
percentage = tempPercentage;
}
}
else
{
throw new SocketException();
}
if (bytesRec == 0)
{
break;
}
}
if (temp != zipFileSize)
{
FileCancel?.Invoke(id, Constants.NOTIFICATION_STATE.CANCELED);
fs.Close();
ReleaseResources(handler);
return;
}
fs.Close();
string currentDirectory = String.Empty;
while (String.IsNullOrEmpty(currentDirectory))
{
if (!settings.DefaultDir)
{
FolderBrowserDialog fbd = new FolderBrowserDialog
{
Description = "Selezione la cartella in cui salvare il file"
};
if (fbd.ShowDialog() == DialogResult.OK)
{
currentDirectory = fbd.SelectedPath;
}
}
else
{
if (Directory.Exists(settings.DefaultDirPath))
{
currentDirectory = settings.DefaultDirPath;
}
else
{
FolderBrowserDialog fbd = new FolderBrowserDialog
{
Description = "La cartella predefinita non è stata trovata, selezionane un altra"
};
if (fbd.ShowDialog() == DialogResult.OK)
{
currentDirectory = fbd.SelectedPath;
}
}
}
}
if (Settings.GetInstance.AutoRename)
{
OverwriteFileName(commandString, fileNameString, zipLocation, currentDirectory, user, id);
}
else
{
string str = String.Empty;
RenamingFile rf = new RenamingFile();
if (String.Compare(commandString, Constants.FILE_COMMAND) == 0)
{
archive = ZipFile.OpenRead(zipLocation);
foreach (ZipArchiveEntry entry in archive.Entries)
{
str = String.Empty;
if (File.Exists(currentDirectory + "\\" + entry.Name))
{
rf.SetFields(entry.Name, currentDirectory, 0);
rf.Activate();
rf.Topmost = true;
rf.Topmost = false;
rf.WindowState = System.Windows.WindowState.Normal;
rf.ShowDialog();
if (String.IsNullOrEmpty(rf.NewName))
{
throw new Exception();
}
str = currentDirectory + "//" + rf.NewName;
}
else
{
str = currentDirectory + "//" + entry.Name;
}
entry.ExtractToFile(str, true);
}
}
else if (String.Compare(commandString, Constants.DIR_COMMAND) == 0)
{
if (Directory.Exists(currentDirectory + "\\" + fileNameString))
{
rf.SetFields(fileNameString, currentDirectory, 1);
rf.ShowDialog();
if (String.IsNullOrEmpty(rf.NewName))
{
throw new Exception();
}
str = currentDirectory + "//" + rf.NewName;
}
else
{
str = currentDirectory + "//" + fileNameString;
}
ZipFile.ExtractToDirectory(zipLocation, str);
}
}
}
catch (SocketException e)
{
Console.WriteLine("Receiver");
var st = new StackTrace(e, true);
// Get the top stack frame
var frame = st.GetFrame(st.FrameCount - 1);
// Get the line number from the stack frame
var line = frame.GetFileLineNumber();
Console.WriteLine("Error at line {0} ", line);
Console.WriteLine(e.SocketErrorCode);
if (zipFileSize == 0)
{
ReceivingFailure?.Invoke(fileNameString, ipSender, Constants.NOTIFICATION_STATE.NET_ERROR);
}
else
{
FileCancel?.Invoke(id, Constants.NOTIFICATION_STATE.REC_ERROR);
}
}
catch (Exception e)
{
Console.WriteLine("Receiver");
var st = new StackTrace(e, true);
// Get the top stack frame
var frame = st.GetFrame(st.FrameCount - 1);
// Get the line number from the stack frame
var line = frame.GetFileLineNumber();
Console.WriteLine("Error at line {0} ", line);
ReceivingFailure?.Invoke(fileNameString, ipSender, Constants.NOTIFICATION_STATE.FILE_ERROR_REC);
}
finally
{
if (fs != null)
{
fs.Close();
}
if (archive != null)
{
archive.Dispose();
}
if (!String.IsNullOrEmpty(zipLocation))
{
if (File.Exists(zipLocation) && zipToDelete)
{
File.Delete(zipLocation);
}
}
ReleaseResources(handler);
}
}