(Node.js) Get the LastErrorText for an Asynchronous Method Call

See more Async Examples

Demonstrates how to get the LastErrorText information for a Chilkat method called asynchronously.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOS

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

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

    var socket = new chilkat.Socket();

    // The Async call simply creates the task.  The "Connect" method has not yet been called.
    var maxWaitMs = 5000;
    // Let's intentionally cause this connect to fail by giving it an invalid domain..
    // task: Task
    var task = socket.ConnectAsync("amazonbladflakjsdflksadjf.com",443,true,maxWaitMs);
    if (socket.LastMethodSuccess == false) {
        console.log(socket.LastErrorText);
        return;
    }

    // Start the background thread to run the task.
    var success = task.Run();
    if (!success) {
        console.log(task.LastErrorText);

        return;
    }

    // The application is now free to do anything else

    // For this example, we'll simply sleep and periodically
    // check to see if the Socket Connect if finished.
    while (task.Finished !== true) {
        // Sleep 1 ms.
        task.SleepMs(1);
    }

    // If the task completed, it means the method (in this case the Connect method) was called and returned success or failure.
    if (task.StatusInt !== 7) {
        console.log("Task did not complete.");
        console.log("task status: " + task.Status);

        return;
    }

    // Get the success/failure of the Connect
    // (This is the return value of the Connect method had it been called synchronously)
    success = task.GetResultBool();
    if (success == false) {
        // Get the LastErrorText for the Connect method call.
        // Had we called Connect synchronously, we would've simply accessed the socket object's LastErrorText property.
        // Instead, we get the task object's ResultErrorText.
        console.log(task.ResultErrorText);
    }
    else {
        console.log("Connect succeeded.");
    }


}

chilkatExample();