(Ruby) Multiple Hop SSH to SFTP

Demonstrates how to SFTP through an intermediate SSH server (multiple hop). The scheme looks like this:

Application => ServerSSH1 => ServerSFtp

The ConnectThroughSsh method is added in Chilkat version 9.5.0.55 to accomplish this task.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

ssh1 = Chilkat::CkSsh.new()

# Hostname may be an IP address or domain name:
hostname = "192.168.1.111"
port = 22

# Connect directly to the 1st SSH server:
success = ssh1.Connect(hostname,port)
if (success != true)
    print ssh1.lastErrorText() + "\n";
    exit
end

# Authenticate using login/password:
success = ssh1.AuthenticatePw("myLogin","myPassword")
if (success != true)
    print ssh1.lastErrorText() + "\n";
    exit
end

# Connect through the 1st SSH connection to reach a 2nd SSH server (for SFTP)
# Note: Any number of connections may be simultaneously tunneled through a single
# existing SSH connection.
sftp = Chilkat::CkSFtp.new()

# Connect to some SSH/SFTP server through ssh1.
success = sftp.ConnectThroughSsh(ssh1,"sftp.someremoteserver.com",22)
if (success != true)
    print sftp.lastErrorText() + "\n";
    exit
end

# Authenticate with the SFTP server. 
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

# Upload from the local file to the SSH server.
# Important -- the remote filepath is the 1st argument,
# the local filepath is the 2nd argument;
remoteFilePath = "hamlet.xml"
localFilePath = "c:/temp/hamlet.xml"

success = sftp.UploadFileByName(remoteFilePath,localFilePath)
if (success != true)
    print sftp.lastErrorText() + "\n";
    exit
end

print "Success." + "\n";

# Close the connection with the SFTP server.(This closes the the tunnel through ssh1.)
# The connection with ssh1 is still alive, and may be used for more connections.
sftp.Disconnect()

# ...
# ...
# ...

ssh1.Disconnect()