Delphi ActiveX

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).

Delphi ActiveX

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
socket: TChilkatSocket;
maxWaitMs: Integer;
useTls: Integer;
bigEndian: Integer;
dt: TCkDateTime;
bLocalTime: Integer;

begin
success := 0;

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

socket := TChilkatSocket.Create(Self);

// Connect to an NIST time server and read the current date/time
maxWaitMs := 4000;
useTls := 0;
success := socket.Connect('time-c.nist.gov',37,useTls,maxWaitMs);
if (success <> 1) then
  begin
    Memo1.Lines.Add(socket.LastErrorText);
    Exit;
  end;

// 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
// 1 or 0 to indicate success.  If successful, the integer
// is obtained via the ReceivedInt property.
bigEndian := 1;
success := socket.ReceiveInt32(bigEndian);
if (success <> 1) then
  begin
    Memo1.Lines.Add(socket.LastErrorText);
    Exit;
  end;

dt := TCkDateTime.Create(Self);
dt.SetFromNtpTime(socket.ReceivedInt);

// Show the current local date/time
bLocalTime := 1;
Memo1.Lines.Add('Current local date/time: ' + dt.GetAsRfc822(bLocalTime));

maxWaitMs := 10;
socket.Close(maxWaitMs);
end;