(JavaScript) Get Current Date/Time from NIST Time Server

Demonstrates using Chilkat Socket to connect to an NIST time server and (using the old Time Protocol (RFC 868)), will read the current GMT time.

Note: This is not necessarily the very best means for getting the current date/time. The most commonly used time protocol is the Network Time Protocol (RFC-1305).

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.

var success = false;

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

var socket = new CkSocket();

// Connect to an NIST time server and read the current date/time
var maxWaitMs = 4000;
var useTls = false;
success = socket.Connect("time-c.nist.gov",37,useTls,maxWaitMs);
if (success !== true) {
    console.log(socket.LastErrorText);
    return;
}

// The time server will send a big-endian 32-bit integer representing
// the number of seconds since since 00:00 (midnight) 1 January 1900 GMT.
// The ReceiveInt32 method will receive a 4-byte integer, but returns
// true or false to indicate success.  If successful, the integer
// is obtained via the ReceivedInt property.
var bigEndian = true;
success = socket.ReceiveInt32(bigEndian);
if (success !== true) {
    console.log(socket.LastErrorText);
    return;
}

var dt = new CkDateTime();
dt.SetFromNtpTime(socket.ReceivedInt);

// Show the current local date/time
var bLocalTime = true;
console.log("Current local date/time: " + dt.GetAsRfc822(bLocalTime));

maxWaitMs = 10;
socket.Close(maxWaitMs);