Go

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.

Go

    success := false

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

    ssh1 := chilkat.NewSsh()

    // 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 {
        fmt.Println(ssh1.LastErrorText())
        ssh1.DisposeSsh()
        return
    }

    // Authenticate using login/password:
    success = ssh1.AuthenticatePw("myLogin","myPassword")
    if success != true {
        fmt.Println(ssh1.LastErrorText())
        ssh1.DisposeSsh()
        return
    }

    // 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.NewSFtp()

    // Connect to some SSH/SFTP server through ssh1.
    success = sftp.ConnectThroughSsh(ssh1,"sftp.someremoteserver.com",22)
    if success != true {
        fmt.Println(sftp.LastErrorText())
        ssh1.DisposeSsh()
        sftp.DisposeSFtp()
        return
    }

    // Authenticate with the SFTP server. 
    success = sftp.AuthenticatePw("myLogin","myPassword")
    if success != true {
        fmt.Println(sftp.LastErrorText())
        ssh1.DisposeSsh()
        sftp.DisposeSFtp()
        return
    }

    // After authenticating, the SFTP subsystem must be initialized:
    success = sftp.InitializeSftp()
    if success != true {
        fmt.Println(sftp.LastErrorText())
        ssh1.DisposeSsh()
        sftp.DisposeSFtp()
        return
    }

    // 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 {
        fmt.Println(sftp.LastErrorText())
        ssh1.DisposeSsh()
        sftp.DisposeSFtp()
        return
    }

    fmt.Println("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()

    ssh1.DisposeSsh()
    sftp.DisposeSFtp()