(Node.js) Async Accept Socket Connection

Demonstrates how to get the connected client socket after accepting a connection 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 assumes the Chilkat Socket API to have been previously unlocked.
    // See Socket Unlock Sample for sample code.

    var listenSocket = new chilkat.Socket();

    // Bind to a port and listen.
    // This example will listen at port 5555 and allows for a backlog
    // of 25 pending connection requests.
    var success = listenSocket.BindAndListen(5555,25);
    if (success !== true) {
        console.log(listenSocket.LastErrorText);
        return;
    }

    // Start a background task to accept an incoming connection ...
    var maxWaitMs = 20000;
    // acceptTask: Task
    var acceptTask = listenSocket.AcceptNextConnectionAsync(maxWaitMs);
    acceptTask.Run();

    // ...
    // ...
    // ...

    // Imagine at this point the task has completed successfully,
    // and a connection was accepted.  Here's how to get the connected socket...
    var connectedClient = new chilkat.Socket();
    success = connectedClient.LoadTaskResult(acceptTask);

    // Here's how it works:  The AcceptNextConnection method would normally
    // return a socket object when called synchronously.  When called asynchronously,
    // it cannot do so because it returns the task object.  When the async method
    // (running in a background thread) completes, the socket object that is the client
    // connection is contained within the task object.
    // 
    // This can be generalized for any case where a Chilkat method returns an object.
    // The async version of that method is such that the object returned in the background
    // thread is contained within the task object.

    // To get the result object, we create a new object instance of that type.
    // In this case, we create a socket object (connectedClient).  There is a LoadTaskResult
    // method in all Chilkat classes that can be a return value of an async method call.
    // The LoadTaskResult method transfers the returned object from the task to the caller.

}

chilkatExample();