/// <summary>
/// Requests the permission to upload a file with its header. All further information is specfied in the <see cref="FTEventArgs"/>.
/// </summary>
/// <param name="e">Specifies an remote identifier for the file, a local path and many more information of the file to upload.</param>
public Task <bool> StartUploadAsync(FTEventArgs e)
{
e.Assign(parent, this);
e.Mode = StreamMode.PushFile;
currentItem = e;
var packet = new P07OpenFileTransfer(e.Identifier, e.Mode);
packet.PrepareSend(parent.ConnectionVersion.Value);
return(parent.Manager.SendPacketAsync(packet));
}
// overriding HandleP05KeepAlive is not neccessary.
// overriding HandleP06Accepted is not neccessary.
internal override Task <bool> HandleP07OpenFileTransfer(P07OpenFileTransfer p)
{
if (parent.ConnectionVersion.Value < 2) // before VSL 1.2
{
parent.ExceptionHandler.CloseConnection("InvalidPacket",
"VSL clients can not handle P07OpenFileTransfer.",
nameof(PacketHandlerClient), nameof(HandleP07OpenFileTransfer));
return(Task.FromResult(false));
}
else
{
return(base.HandleP07OpenFileTransfer(p));
}
}
internal Task <bool> OnPacketReceivedAsync(P07OpenFileTransfer packet)
{
if (currentItem == null)
{
FTEventArgs e = new FTEventArgs(packet.Identifier, packet.StreamMode);
currentItem = e;
parent.ThreadManager.Post(() => Request?.Invoke(this, e));
#if DEBUG
parent.Log($"FileTransfer with {e.Mode} and Identifier {e.Identifier} requested");
#endif
return(Task.FromResult(true));
}
else // It may be more efficient not to close the connection but only to cancel the file transfer.
{
parent.ExceptionHandler.CloseConnection("InvalidRequest",
"A new file transfer was requested before the last one was finished or aborted.",
nameof(FTSocket), "OnPacketReceivedAsync(P07OpenFileTransfer)");
return(Task.FromResult(false));
}
}
internal virtual Task <bool> HandleP07OpenFileTransfer(P07OpenFileTransfer p)
{
p.PrepareReceive(parent.ConnectionVersion.Value);
return(parent.FileTransfer.OnPacketReceivedAsync(p));
}
