(Node.js) Accept Connection on Socket

Demonstrates how to create a TCP/IP socket, listen on a port, accept an incoming connection, and send a "Hello World" message to the client.

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 listenSocket = new chilkat.Socket();

    // Bind to a port and listen for incoming connections:
    // 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;
    }

    // Get the next incoming connection
    // Wait a maximum of 20 seconds (20000 millisec)
    // connectedSocket: Socket
    var connectedSocket;
    connectedSocket = listenSocket.AcceptNextConnection(20000);
    if (listenSocket.LastMethodSuccess == false) {
        console.log(listenSocket.LastErrorText);
        return;
    }

    // Set maximum timeouts for reading an writing (in millisec)
    connectedSocket.MaxReadIdleMs = 10000;
    connectedSocket.MaxSendIdleMs = 10000;

    // Send a "Hello World!" message to the client:
    success = connectedSocket.SendString("Hello World!");
    if (success !== true) {
        console.log(connectedSocket.LastErrorText);

        return;
    }

    // Close the connection with the client.
    // Wait a max of 20 seconds (20000 millsec)
    success = connectedSocket.Close(20000);

    console.log("success!");

}

chilkatExample();