SFTP Resume Download

Demonstrates how to resume an SFTP download from a previous partial download.

Download Chilkat Ruby Library

require 'chilkat'

#  Important: It is helpful to send the contents of the
#  sftp.LastErrorText property when requesting support.

sftp = Chilkat::CkSFtp.new()

#  Any string automatically begins a fully-functional 30-day trial.
success = sftp.UnlockComponent("Anything for 30-day trial")
if (success != true)
    print sftp.lastErrorText() + "\n"
    exit
end

#  Set some timeouts, in milliseconds:
sftp.put_ConnectTimeoutMs(5000)
sftp.put_IdleTimeoutMs(10000)

#  Connect to the SSH server.
#  The standard SSH port = 22
#  The hostname may be a hostname or IP address.

hostname = "www.my-ssh-server.com"
port = 22
success = sftp.Connect(hostname,port)
if (success != true)
    print sftp.lastErrorText() + "\n"
    exit
end

#  Authenticate with the SSH server.  Chilkat SFTP supports
#  both password-based authenication as well as public-key
#  authentication.  This example uses password authenication.
success = sftp.AuthenticatePw("myLogin","myPassword")
if (success != true)
    print sftp.lastErrorText() + "\n"
    exit
end

#  After authenticating, the SFTP subsystem must be initialized:
success = sftp.InitializeSftp()
if (success != true)
    print sftp.lastErrorText() + "\n"
    exit
end

#  Download the file:

localFilePath = "c:/temp/hamlet.xml"
remoteFilePath = "subdir1/subdir2/hamlet.xml"
#  The ResumeDownloadFileByName method will check
#  the local file and begin downloading the remote file
#  at the appropriate point.  For example, if the local
#  file is already 215624 bytes long, it will begin downloading
#  the remote file at the 215625'th byte -- appending to
#  the local file.
success = sftp.ResumeDownloadFileByName(remoteFilePath,localFilePath)
if (success != true)
    print sftp.lastErrorText() + "\n"
    exit
end

print "Success." + "\n"