Resume file transfer using SSH.NET [duplicate]

Question

Is there a built-in way to resume interrupted file transfers using SSH.NET? I've found such an option in the WinSCP .NET API, but can't find it in SSH.NET.

Answer 1

SftpFileStream looks like it supports FileMode.Append. I am experimenting with this approach to resume a file transfer:

private static void WriteOrResumeRemoteFile(SftpClient remoteHost, string remoteFileName, FileStream localFileStream)
{
    using (SftpFileStream remoteStream = remoteHost.Open(remoteFileName, FileMode.Append, FileAccess.Write))
    {
        byte[] buffer = new byte[409600];
        int bytesRead;

        if (remoteStream.Length > 0)
        {
            localFileStream.Seek(remoteStream.Length, SeekOrigin.Begin);
        }

        bytesRead = 1;
        while (bytesRead > 0)
        {
            DateTime timeBeforeRead = DateTime.Now;

            bytesRead = localFileStream.Read(buffer, 0, 409600);
            if (bytesRead > 0)
            {
                remoteStream.Write(buffer, 0, bytesRead);
                long estimatedMsRemain = Convert.ToInt64(Convert.ToDouble(localFileStream.Length - localFileStream.Position) * Convert.ToDouble((DateTime.Now - timeBeforeRead).Ticks) / Convert.ToDouble(bytesRead));
                Debug.WriteLine(localFileStream.Position + " total bytes written (" + (Convert.ToDouble(localFileStream.Position) / Convert.ToDouble(localFileStream.Length)).ToString("p") +
                    ", ETR: " + (new TimeSpan(estimatedMsRemain)).ToString() + ")");
            }
        }

        remoteStream.Close();
    }
}