private void downloadbutton_Click(object sender, EventArgs e)
{
try
{
var ndownfile = new SaveFile {
StartPosition = FormStartPosition.CenterParent
};
if (ndownfile.ShowDialog(this) == DialogResult.OK)
{
if (ndownfile.filenametxb.Text == string.Empty)
{
MessageBox.Show("No blank!", "Notification", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
else
{
var dialogResult = MessageBox.Show(this, "Do you want to encrypt before downloading?", "Notification", MessageBoxButtons.YesNo);
string message = "GETFILE" + "|" + client_name + "|" + ndownfile.filenametxb.Text + "|" + GetLocalIpAddress() + "|" + (dialogResult == DialogResult.Yes ? "Y" : "N");
client_socket.Send(serialize(message));
var receiveThread = new Thread(() =>
{
var cmd = ((string)message).Split('|');
var listener = new TcpListener(IPAddress.Parse(GetLocalIpAddress()), 2504);
var bufferSize = 1024;
var bytesRead = 0;
var allBytesRead = 0;
// Start listening
listener.Start();
// Accept client
var client = listener.AcceptTcpClient();
listener.Stop();
var netStream = client.GetStream();
// Read length of incoming data
var length = new byte[4];
bytesRead = netStream.Read(length, 0, 4);
var dataLength = BitConverter.ToInt32(length, 0);
// Read the data
var bytesLeft = dataLength;
var datas = new byte[dataLength];
while (bytesLeft > 0)
{
var nextPacketSize = bytesLeft > bufferSize ? bufferSize : bytesLeft;
bytesRead = netStream.Read(datas, allBytesRead, nextPacketSize);
allBytesRead += bytesRead;
bytesLeft -= bytesRead;
}
if (cmd[4] == "Y")
{
datas = decrypt(datas, "dcmongtule");
}
// Save to files
var frmNewName = new newfilename {
StartPosition = FormStartPosition.CenterParent
};
if (frmNewName.ShowDialog(this) == DialogResult.OK && frmNewName.textboxnewname.Text.Trim() != string.Empty)
{
if (cmd[2].Contains('.'))
{
cmd[2] = cmd[2].Substring(cmd[2].LastIndexOf('.'));
}
cmd[2] = frmNewName.textboxnewname.Text.Trim() + cmd[2];
}
else
{
MessageBox.Show(this, "New Name is invalid. Old file name is kept", "Notification", MessageBoxButtons.OK);
}
File.WriteAllBytes("received\\" + cmd[2], datas);
// Clean up
netStream.Close();
client.Close();
});
receiveThread.Start();
}
}
}
catch
{
MessageBox.Show("Disconnect from server. Try again", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void upload()
{
try
{
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "All Files (*.*)|*.*";
openFileDialog.FilterIndex = 1;
openFileDialog.Multiselect = false;
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
var dir = openFileDialog.FileName.Substring(openFileDialog.FileName.LastIndexOf('\\') + 1);
var frmNewName = new newfilename {
StartPosition = FormStartPosition.CenterParent
};
if (frmNewName.ShowDialog() == DialogResult.OK)
{
if (frmNewName.textboxnewname.Text.Trim().Length == 0)
{
MessageBox.Show("File name cannot be blank. Old file name is kept", "Notification",
MessageBoxButtons.OK);
}
else
{
dir = dir.Trim();
if (dir.Contains('.'))
{
dir = dir.Substring(dir.IndexOf('.'));
}
else
{
dir = string.Empty;
}
dir = frmNewName.textboxnewname.Text + dir;
}
}
var dia = MessageBox.Show("Do you want to encrypt?", "Notification", MessageBoxButtons.YesNo);
object message = "DATA" + "|" + client_name + "|" + dir + "|" + (dia == DialogResult.Yes ? "Y" : "N");
client_socket.Send(serialize(message));
Thread sendThread = new Thread(directory =>
{
var cmd = ((string)directory).Split('|');
var ipAddress = IPAddress.Parse(ip_address);
var port = 2504;
var bufferSize = 1024;
var client = new TcpClient();
try
{
client.Connect(new IPEndPoint(ipAddress, port));
}
catch
{
client.Close();
return;
}
var netStream = client.GetStream();
var data = File.ReadAllBytes(cmd[0]);
if (cmd[1] == "Y")
{
data = encrypt(data, "dcmongtule");
}
// Build the package
var dataLength = BitConverter.GetBytes(data.Length);
var package = new byte[4 + data.Length];
dataLength.CopyTo(package, 0);
data.CopyTo(package, 4);
// Send to server
var bytesSent = 0;
var bytesLeft = package.Length;
while (bytesLeft > 0)
{
var nextPacketSize = bytesLeft > bufferSize ? bufferSize : bytesLeft;
netStream.Write(package, bytesSent, nextPacketSize);
bytesSent += nextPacketSize;
bytesLeft -= nextPacketSize;
}
netStream.Flush();
netStream.Dispose();
netStream.Close();
client.Close();
client.Dispose();
});
sendThread.Start(openFileDialog.FileName + "|" + (dia == DialogResult.Yes ? "Y" : "N"));
}
}
catch
{
MessageBox.Show("Disconnect from server. Try again", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
