SSH Tunnel Thread Activity Log

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Demonstrates the tunnel-log properties KeepTunnelLog, TunnelLog, and TunnelLogPath, which record the activity of the SSH tunnel and client-manager threads.

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

Background: This is the counterpart to the accept log, covering the SSH side rather than the listener: the tunnel and client-manager threads that actually move data. As with the accept log, KeepTunnelLog enables the in-memory TunnelLog while TunnelLogPath writes a separate file. Together the two logs let you localize a problem to either the accepting side or the forwarding side.

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    success := false

    //  Demonstrates the SshTunnel tunnel-log properties KeepTunnelLog, TunnelLog, and TunnelLogPath.
    //  
    //  These log the activity of the SSH tunnel and client-manager threads.

    tunnel := chilkat.NewSshTunnel()

    //  Retain the SSH tunnel-thread activity in memory so it can be read from the TunnelLog property.
    tunnel.SetKeepTunnelLog(true)

    //  Optionally also write the tunnel-thread activity to a file (separate from the in-memory log).
    tunnel.SetTunnelLogPath("qa_output/tunnel.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
    }

    //  ... clients transfer data through the tunnel ...

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

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


    tunnel.DisposeSshTunnel()