(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, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

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();