Sample code for 30+ languages & platforms
Ruby

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).

Chilkat Ruby Downloads

Ruby
require 'chilkat'

success = false

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

sftp = Chilkat::CkSFtp.new()

# Connect to the AWS SFTP server.
# Change the domain to your value.
domain = "s-123456df999999fab.server.transfer.eu-west-2.amazonaws.com"
port = 22
success = sftp.Connect(domain,port)
if (success == false)
    print sftp.lastErrorText() + "\n";
    exit
end

# Load your AWS SFTP private key PEM file..
sshKey = Chilkat::CkSshKey.new()
keyText = sshKey.loadText("qa_data/pem/s3_sftp_privateKey.pem")
if (sshKey.get_LastMethodSuccess() != true)
    print sshKey.lastErrorText() + "\n";
    exit
end

success = sshKey.FromOpenSshPrivateKey(keyText)
if (success == false)
    print sshKey.lastErrorText() + "\n";
    exit
end

# Authenticate with the SSH server using the private key.
success = sftp.AuthenticatePk("myUsername",sshKey)
if (success == false)
    print sftp.lastErrorText() + "\n";
    exit
end

# After authenticating, the SFTP subsystem must be initialized:
success = sftp.InitializeSftp()
if (success == false)
    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 == false)
    print sftp.lastErrorText() + "\n";
    exit
end

print "Success." + "\n";