private async void Vsl_FileTransferRequested(object sender, FTEventArgs e)
{
if (e.Mode == StreamMode.PushHeader || e.Mode == StreamMode.PushFile)
{
using (OpenFileDialog fd = new OpenFileDialog())
{
fd.InitialDirectory = Program.TempPath;
if (fd.ShowDialog() == DialogResult.OK)
{
if (lastMeta != null && MessageBox.Show("Sie können die Metadaten der letzen Dateiübertragung erneut verwenden",
"Metadaten wiederverwenden?", MessageBoxButtons.YesNo) == DialogResult.No)
{
lastMeta = null;
}
await vsl.FileTransfer.AcceptAsync(e, fd.FileName, lastMeta);
}
else
{
await vsl.FileTransfer.CancelAsync(e);
}
}
}
else
{
e.FileMetaReceived += Vsl_FTFileMetaReceived;
await vsl.FileTransfer.AcceptAsync(e, Path.Combine(Program.TempPath, Path.GetRandomFileName()));
}
}
private async void Vsl_FTFileMetaReceived(object sender, EventArgs e)
{
FTEventArgs args = (FTEventArgs)sender;
lastMeta = args.FileMeta;
await vsl.FileTransfer.ContinueAsync(args);
args.FileMetaReceived -= Vsl_FTFileMetaReceived;
}
private void VslClient_FTCanceled(object sender, EventArgs e)
{
FTEventArgs args = (FTEventArgs)sender;
args.Progress -= VslClient_FTProgress;
args.Finished -= VslClient_FTFinished;
args.Canceled -= VslClient_FTCanceled;
btnReceiveFile.Enabled = true;
btnSendFile.Enabled = true;
}
private async void VslClient_FTFileMetaReceived(object sender, EventArgs e)
{
FTEventArgs args = (FTEventArgs)sender;
if (args.FileMeta.Algorithm == ContentAlgorithm.Aes256CbcHmacSha256 && !string.IsNullOrWhiteSpace(TbFileKey.Text))
{
byte[] keys = Util.GetBytes(TbFileKey.Text);
args.FileMeta.Decrypt(keys.Take(32), keys.Skip(32));
}
await vslClient.FileTransfer.ContinueAsync(args);
}
private void VslClient_FTFinished(object sender, EventArgs e)
{
FTEventArgs args = (FTEventArgs)sender;
args.Progress -= VslClient_FTProgress;
args.Finished -= VslClient_FTFinished;
args.Canceled -= VslClient_FTCanceled;
if (args.Mode == StreamMode.GetFile &&
MessageBox.Show("Möchten Sie die empfangenen Metadaten übernehmen?",
"Metadaten übernehmen?", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
args.FileMeta.Apply(args.Path, Program.TempPath);
}
btnReceiveFile.Enabled = true;
btnSendFile.Enabled = true;
}
private void BtnReceiveFile_Click(object sender, EventArgs e)
{
string path = Path.Combine(Program.TempPath, Path.GetRandomFileName());
MessageBox.Show($"Temporary file path: {path}\r\n\r\n" +
"Default value if defined is %VSLTest_Temp%\\{filename}\r\n" +
"otherwise it is %TEMP%\\VSLTest\\{filename}");
FTEventArgs args = new FTEventArgs(new Identifier(0), null, path);
args.Progress += VslClient_FTProgress;
args.Finished += VslClient_FTFinished;
args.Canceled += VslClient_FTCanceled;
args.FileMetaReceived += VslClient_FTFileMetaReceived;
vslClient.FileTransfer.StartDownloadAsync(args);
btnReceiveFile.Enabled = false;
btnSendFile.Enabled = false;
}
private async void BtnSendFile_Click(object sender, EventArgs e)
{
string path;
using (OpenFileDialog fd = new OpenFileDialog())
{
fd.InitialDirectory = Program.TempPath;
if (fd.ShowDialog() == DialogResult.Cancel)
{
return;
}
path = fd.FileName;
}
ContentAlgorithm algorithm = ContentAlgorithm.None;
byte[] aesKey = null;
byte[] hmacKey = null;
if (!string.IsNullOrWhiteSpace(TbFileKey.Text))
{
algorithm = ContentAlgorithm.Aes256CbcHmacSha256;
byte[] keys = Util.GetBytes(TbFileKey.Text);
hmacKey = keys.Take(32);
aesKey = keys.Skip(32);
}
FTEventArgs args = new FTEventArgs(new Identifier(0), await FileMeta.FromFileAsync(path, algorithm, hmacKey, aesKey, null), path);
args.Progress += VslClient_FTProgress;
args.Finished += VslClient_FTFinished;
if (!await vslClient.FileTransfer.StartUploadAsync(args))
{
return;
}
btnReceiveFile.Enabled = false;
btnSendFile.Enabled = false;
}
