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(PowerBuilder) POP3 over Multiple Hop SSH

Demonstrates how to read POP3 email (using TCP or TLS) tunneled through mulitple-hop SSH. The scheme looks like this:

Application => ServerSSH1 => ServerSSH2 => POP3Server

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Ssh1
integer li_Success
oleobject loo_Ssh2
oleobject loo_Mailman
integer li_NumMessages
integer i
oleobject loo_Email

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

loo_Ssh1 = create oleobject
li_rc = loo_Ssh1.ConnectToNewObject("Chilkat_9_5_0.Ssh")
if li_rc < 0 then
    destroy loo_Ssh1
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Connect directly to the 1st SSH server.
li_Success = loo_Ssh1.Connect("serverssh1.com",22)
if li_Success <> 1 then
    Write-Debug loo_Ssh1.LastErrorText
    destroy loo_Ssh1
    return
end if

// Authenticate using login/password:
li_Success = loo_Ssh1.AuthenticatePw("ssh1Login","ssh1Password")
if li_Success <> 1 then
    Write-Debug loo_Ssh1.LastErrorText
    destroy loo_Ssh1
    return
end if

// Connect through the 1st SSH connection to reach a 2nd SSH server.
// Note: Any number of SSH connections may be simultaneously tunneled through a single
// existing SSH connection.
loo_Ssh2 = create oleobject
li_rc = loo_Ssh2.ConnectToNewObject("Chilkat_9_5_0.Ssh")

li_Success = loo_Ssh2.ConnectThroughSsh(loo_Ssh1,"serverssh2.com",22)
if li_Success <> 1 then
    Write-Debug loo_Ssh2.LastErrorText
    destroy loo_Ssh1
    destroy loo_Ssh2
    return
end if

// Authenticate with ssh2...
li_Success = loo_Ssh2.AuthenticatePw("ssh2Login","ssh2Password")
if li_Success <> 1 then
    Write-Debug loo_Ssh2.LastErrorText
    destroy loo_Ssh1
    destroy loo_Ssh2
    return
end if

loo_Mailman = create oleobject
li_rc = loo_Mailman.ConnectToNewObject("Chilkat_9_5_0.MailMan")

// Tell the mailman object to connect to the POP3 server though the ssh2 tunnel (which itself is routed through ssh1).
// The connection looks like this:  Application => ServerSSH1 => ServerSSH2 => POP3Server
li_Success = loo_Mailman.UseSsh(loo_Ssh2)
if li_Success <> 1 then
    Write-Debug loo_Mailman.LastErrorText
    destroy loo_Ssh1
    destroy loo_Ssh2
    destroy loo_Mailman
    return
end if

// Set the POP3 server's hostname
loo_Mailman.MailHost = "pop.someMailServer.com"

// Set the POP3 login/password.
loo_Mailman.PopUsername = "myLogin"
loo_Mailman.PopPassword = "myPassword"

// Establish the POP3 connection through the ssh2 tunnel.
li_Success = loo_Mailman.Pop3BeginSession()
if li_Success <> 1 then
    Write-Debug loo_Mailman.LastErrorText
    destroy loo_Ssh1
    destroy loo_Ssh2
    destroy loo_Mailman
    return
end if

// Get the number of messages in the mailbox.
li_NumMessages = loo_Mailman.GetMailboxCount()

i = 1

do while i <= li_NumMessages

    loo_Email = loo_Mailman.FetchByMsgnum(i)
    if loo_Mailman.LastMethodSuccess <> 1 then
        Write-Debug loo_Mailman.LastErrorText
        destroy loo_Ssh1
        destroy loo_Ssh2
        destroy loo_Mailman
        return
    end if

    Write-Debug loo_Email.From + ": " + loo_Email.Subject + "~n"
    destroy loo_Email

    i = i + 1
loop

// Close the connection with the POP3 server.  (This closes the tunnel through ssh2)
// The connection with ssh2 is still alive, and may be used for more connections.
li_Success = loo_Mailman.Pop3EndSession()

// Close the connection with ssh2.  (This closes the the tunnel through ssh1.)
// The connection with ssh1 is still alive, and may be used for more connections.

loo_Ssh2.Disconnect()

loo_Ssh1.Disconnect()


destroy loo_Ssh1
destroy loo_Ssh2
destroy loo_Mailman

 

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