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(Ruby) IMAP SSH Tunneling (Port Forwarding)Demonstrates how to setup and use an SSH tunnel for IMAP. Note: This example requires Chilkat v11.0.0 or greater.
require 'chilkat' success = false # This example assumes the Chilkat API to have been previously unlocked. # See Global Unlock Sample for sample code. imap = Chilkat::CkImap.new() # The SSH hostname may be a hostname or an # IP address, such as "192.168.1.108". # The port is typically 22 (the standard port for SSH). sshHostname = "www.mysshserver.com" sshPort = 22 # Connect to an SSH server and establish the SSH tunnel: success = imap.SshOpenTunnel(sshHostname,sshPort) if (success == false) print imap.lastErrorText() + "\n"; exit end # Authenticate with the SSH server via a login/password # or with a public key. # This example demonstrates SSH password authentication. # Note: This is not authenticating with the IMAP server, it is # for authenticating with the SSH server, which is separate. success = imap.SshAuthenticatePw("mySshLogin","mySshPassword") if (success == false) print imap.lastErrorText() + "\n"; exit end # OK, the SSH tunnel is setup. The IMAP component may # be used exactly the same as usual, except all communications # are sent through the SSH tunnel. # Connect to an IMAP server via the SSH tunnel. # Because the SSH tunnel has been previously setup, # this does not establish a direct connection with the IMAP # server. It directs the SSH server to establish the connection. # In this example, the IMAP server requires SSL/TLS. The TLS connection # will be enclosed within the SSH tunnel. imap.put_Ssl(true) imap.put_Port(993) success = imap.Connect("imap.my-imap-server.com") if (success == false) print imap.lastErrorText() + "\n"; exit end # Authenticate with the IMAP server via the SSH tunnel. success = imap.Login("myLogin","myPassword") if (success == false) print imap.lastErrorText() + "\n"; exit end # Select an IMAP mailbox success = imap.SelectMailbox("Inbox") if (success == false) print imap.lastErrorText() + "\n"; exit end # How many messages in Inbox? msgCount = imap.get_NumMessages() if (msgCount == 0) print "No messages found." + "\n"; exit end upperBound = 10 if (msgCount < upperBound) upperBound = msgCount end # Download up to the 1st 10 messages. email = Chilkat::CkEmail.new() bUid = false for i in 1 .. upperBound success = imap.FetchEmail(false,i,bUid,email) if (success == false) print imap.lastErrorText() + "\n"; exit end print email.ck_from() + "\n"; print email.subject() + "\n"; print "----" + "\n"; end # Disconnect from the IMAP server. # The SSH tunnel remains open. success = imap.Disconnect() if (success == false) print imap.lastErrorText() + "\n"; exit end # It is possible to re-use the existing SSH tunnel for the next connection: success = imap.Connect("imap.my-imap-server2.com") if (success == false) print imap.lastErrorText() + "\n"; exit end # Review the LastErrorText to see that the connection was made via the SSH tunnel: print imap.lastErrorText() + "\n"; success = imap.Disconnect() if (success == false) print imap.lastErrorText() + "\n"; exit end # Finally, close the SSH tunnel. success = imap.SshCloseTunnel() if (success == false) print imap.lastErrorText() + "\n"; exit end print "IMAP SSH tunneling example completed." + "\n"; |
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