SSH Tunnel Listener Activity Log

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Demonstrates the listener-log properties KeepAcceptLog, AcceptLog, and AcceptLogPath, which record the activity of the background listener thread started by BeginAccepting.

Note: The log paths are relative to the application's current working directory. Absolute paths may also be used.

Background: Because the listener runs on a background thread, an activity log is often the only practical way to see what it is doing — which connections it accepted and when. KeepAcceptLog must be enabled for the in-memory AcceptLog to be populated; AcceptLogPath is an independent file-based log that persists across the run. This log covers the listener specifically, as distinct from the TunnelLog that records the SSH tunnel threads.

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    success := false

    //  Demonstrates the SshTunnel listener-log properties KeepAcceptLog, AcceptLog, and AcceptLogPath.
    //  
    //  These log the activity of the background listener thread started by BeginAccepting.

    tunnel := chilkat.NewSshTunnel()

    //  Retain the listener activity log in memory so it can be read from the AcceptLog property.
    tunnel.SetKeepAcceptLog(true)

    //  Optionally also write the listener activity to a file (separate from the in-memory log).
    tunnel.SetAcceptLogPath("qa_output/accept.log")

    tunnel.SetDestHostname("db.internal.example.com")
    tunnel.SetDestPort(5432)

    sshPort := 22
    success = tunnel.Connect("ssh.example.com",sshPort)
    if success == false {
        fmt.Println(tunnel.LastErrorText())
        tunnel.DisposeSshTunnel()
        return
    }

    //  Normally you would not hard-code the password in source.  You should instead obtain it
    //  from an interactive prompt, environment variable, or a secrets vault.
    password := "mySshPassword"

    success = tunnel.AuthenticatePw("mySshLogin",password)
    if success == false {
        fmt.Println(tunnel.LastErrorText())
        tunnel.DisposeSshTunnel()
        return
    }

    listenPort := 1080
    success = tunnel.BeginAccepting(listenPort)
    if success == false {
        fmt.Println(tunnel.LastErrorText())
        tunnel.DisposeSshTunnel()
        return
    }

    //  ... the listener accepts connections for a while ...

    //  Read the accumulated in-memory listener log.
    fmt.Println(tunnel.AcceptLog())

    waitForThreadExit := true
    success = tunnel.CloseTunnel(waitForThreadExit)
    if success == false {
        fmt.Println(tunnel.LastErrorText())
        tunnel.DisposeSshTunnel()
        return
    }


    tunnel.DisposeSshTunnel()