Node.js

SSH Tunnel Listener Activity Log

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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Node.js

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function chilkatExample() {

    var success = false;

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

    var tunnel = new chilkat.SshTunnel();

    //  Retain the listener activity log in memory so it can be read from the AcceptLog property.
    tunnel.KeepAcceptLog = true;

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

    tunnel.DestHostname = "db.internal.example.com";
    tunnel.DestPort = 5432;

    var sshPort = 22;
    success = tunnel.Connect("ssh.example.com",sshPort);
    if (success == false) {
        console.log(tunnel.LastErrorText);
        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.
    var password = "mySshPassword";

    success = tunnel.AuthenticatePw("mySshLogin",password);
    if (success == false) {
        console.log(tunnel.LastErrorText);
        return;
    }

    var listenPort = 1080;
    success = tunnel.BeginAccepting(listenPort);
    if (success == false) {
        console.log(tunnel.LastErrorText);
        return;
    }

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

    //  Read the accumulated in-memory listener log.
    console.log(tunnel.AcceptLog);

    var waitForThreadExit = true;
    success = tunnel.CloseTunnel(waitForThreadExit);
    if (success == false) {
        console.log(tunnel.LastErrorText);
        return;
    }


}

chilkatExample();