Lua Requires Chilkat v9.5.0.55+

Multiple Hop SSH to SFTP

See more SFTP Examples

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

Application => ServerSSH1 => ServerSFtp

The ConnectThroughSsh method is used to accomplish this task.

Lua

local chilkat = require("chilkat")

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

local ssh1 = chilkat.Ssh.new()

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

-- Connect directly to the 1st SSH server:
local success = ssh1:connect(hostname, port)
if not success then
    print(ssh1.last_error_text)
    return
end

-- Authenticate using login/password:
success = ssh1:authenticate_pw("myLogin", "myPassword")
if not success then
    print(ssh1.last_error_text)
    return
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.
local sftp = chilkat.SFtp.new()

-- Connect to some SSH/SFTP server through ssh1.
success = sftp:connect_through_ssh(ssh1, "sftp.someremoteserver.com", 22)
if not success then
    print(sftp.last_error_text)
    return
end

-- Authenticate with the SFTP server.
success = sftp:authenticate_pw("myLogin", "myPassword")
if not success then
    print(sftp.last_error_text)
    return
end

-- After authenticating, the SFTP subsystem must be initialized:
success = sftp:initialize_sftp()
if not success then
    print(sftp.last_error_text)
    return
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;
local remoteFilePath = "hamlet.xml"
local localFilePath = "c:/temp/hamlet.xml"

success = sftp:upload_file_by_name(remoteFilePath, localFilePath)
if not success then
    print(sftp.last_error_text)
    return
end

print("Success.")

-- 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()