Node.js

Bind and Listen on a Randomly Selected Unused Port

See more Socket/SSL/TLS Examples

Demonstrates how to bind and listen on a randomly selected unused port.

Note:The ListenPort property used in this example is available starting in Chilkat v9.5.0.59.

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    var listenSocket = new chilkat.Socket();

    //  Pass a value of 0 for the port number to randomly select
    //  an unused port.
    //  (The 2nd argument allows for a backlog of 25 pending connection requests when accepting connections.)
    success = listenSocket.BindAndListen(5555,25);
    if (success !== true) {
        console.log(listenSocket.LastErrorText);
        return;
    }

    //  Find out what port was chosen.
    //  Note: The ListenPort propety was added in Chilkat v9.5.0.59
    var listenPort = listenSocket.ListenPort;
    console.log("Chosen listen port = " + listenPort);

}

chilkatExample();