Xojo Plugin

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 added in Chilkat version 9.5.0.55 to accomplish this task.

Xojo Plugin

Dim success As Boolean
success = False

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

Dim ssh1 As New Chilkat.Ssh

// Hostname may be an IP address or domain name:
Dim hostname As String
hostname = "192.168.1.111"
Dim port As String
port = 22

// Connect directly to the 1st SSH server:
success = ssh1.Connect(hostname,port)
If (success <> True) Then
    System.DebugLog(ssh1.LastErrorText)
    Return
End If

// Authenticate using login/password:
success = ssh1.AuthenticatePw("myLogin","myPassword")
If (success <> True) Then
    System.DebugLog(ssh1.LastErrorText)
    Return
End If

// 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.
Dim sftp As New Chilkat.SFtp

// Connect to some SSH/SFTP server through ssh1.
success = sftp.ConnectThroughSsh(ssh1,"sftp.someremoteserver.com",22)
If (success <> True) Then
    System.DebugLog(sftp.LastErrorText)
    Return
End If

// Authenticate with the SFTP server. 
success = sftp.AuthenticatePw("myLogin","myPassword")
If (success <> True) Then
    System.DebugLog(sftp.LastErrorText)
    Return
End If

// After authenticating, the SFTP subsystem must be initialized:
success = sftp.InitializeSftp()
If (success <> True) Then
    System.DebugLog(sftp.LastErrorText)
    Return
End If

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

success = sftp.UploadFileByName(remoteFilePath,localFilePath)
If (success <> True) Then
    System.DebugLog(sftp.LastErrorText)
    Return
End If

System.DebugLog("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