B4X

AWS Transfer for SFTP (Amazon S3)

See more SFTP Examples

Once you've setup your AWS Transfer for SFTP in the AWS Console, interacting with it is no different than any other SSH/SFTP server. AWS will provide a private key in PEM format. It is used for authentication (instead of a password). B4X

Dim success As Boolean = False

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

Dim sftp As ChilkatSFtp
sftp.Initialize("sftp")

'  Connect to the AWS SFTP server.
'  Change the domain to your value.
Dim domain As String = "s-123456df999999fab.server.transfer.eu-west-2.amazonaws.com"
Dim port As Int = 22
success = sftp.Connect(domain, port)
If success = False Then
    Log(sftp.LastErrorText)
    Return
End If


'  Load your AWS SFTP private key PEM file..
Dim sshKey As ChilkatSshKey
sshKey.Initialize
Dim keyText As String = sshKey.LoadText("qa_data/pem/s3_sftp_privateKey.pem")
If sshKey.LastMethodSuccess <> True Then
    Log(sshKey.LastErrorText)
    Return
End If

success = sshKey.FromOpenSshPrivateKey(keyText)
If success = False Then
    Log(sshKey.LastErrorText)
    Return
End If


'  Authenticate with the SSH server using the private key.
success = sftp.AuthenticatePk("myUsername", sshKey)
If success = False Then
    Log(sftp.LastErrorText)
    Return
End If


'  After authenticating, the SFTP subsystem must be initialized:
success = sftp.InitializeSftp
If success = False Then
    Log(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 = "hamlet.xml"
Dim localFilePath As String = "c:/temp/hamlet.xml"

success = sftp.UploadFileByName(remoteFilePath, localFilePath)
If success = False Then
    Log(sftp.LastErrorText)
    Return
End If


Log("Success.")