JavaScript

Get Current Date/Time from NIST Time Server

See more Socket/SSL/TLS Examples

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).

JavaScript

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);