Resume file transfer for a half way failed file transfer

Question

I am using this jsch library ( http://www.jcraft.com/jsch/ )in my ColdFusion application. My application wants to implement a retry mechanism - if a file transfer fails half way through then I want to resume (or continue) the file transfer from where it left off. Is this possible to achieve using this jsch library?

Answer 1

Just reconnect and start an upload again with RESUME flag:

channelSftp.put(src, dst, ChannelSftp.RESUME);

The RESUME flag will make JSch query size of a partial remote file and restart the transfer from there. If the file is already uploaded completely, it transfers nothing.