JavaScript

Receive a Single Byte from a Socket

Demonstrates Socket.ReceiveByte, which reads exactly one byte and stores its numeric value in the ReceivedInt property. The argument selects signed or unsigned interpretation.

Background. Fixed-size integers and length prefixes are common building blocks for application-defined binary protocols. Byte order is selectable, with big-endian being network byte order.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

JavaScript

var success = false;

var socket = new CkSocket();

//  Connect to the server using TLS.
var bTls = true;
var maxWaitMs = 5000;
success = socket.Connect("example.com",5000,bTls,maxWaitMs);
if (success == false) {
    console.log(socket.LastErrorText);
    return;
}

//  Read exactly one byte.  Its numeric value is stored in the ReceivedInt property.  Passing true
//  interprets the byte as unsigned (0 through 255); false interprets it as signed.
var bUnsigned = true;
success = socket.ReceiveByte(bUnsigned);
if (success == false) {
    console.log(socket.LastErrorText);
    return;
}

console.log("Received byte value: " + socket.ReceivedInt);