how to get date and time from internet
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- fouednoomen
- Posts: 188
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how to get date and time from internet
Hello all Friends ,
Hello, I need to know how I can get the date and time from the internet
Best regads
Foued Noomen
Hello, I need to know how I can get the date and time from the internet
Best regads
Foued Noomen
Re: how to get date and time from internet
Hello Foued,fouednoomen wrote: ↑Wed Apr 03, 2024 8:39 am Hello, I need to know how I can get the date and time from the internet
Thanks for your request
It is possible with the following source code:
Code: Select all
#include "minigui.ch"
function Main()
MsgInfo( Now() )
return nil
#pragma BEGINDUMP
#ifdef _CRT_SECURE_NO_WARNINGS
#undef _CRT_SECURE_NO_WARNINGS
#endif
#define _CRT_SECURE_NO_WARNINGS 1
#include <hbapi.h>
#ifdef __BORLANDC__
#define _WIN32_WINNT 0x0502
#endif
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#ifdef __BORLANDC__
#include <winsock2.h>
#endif
#include <ws2tcpip.h>
HB_FUNC( NOW )
{
struct addrinfo hints;
struct addrinfo *result;
int sockfd;
int rv;
char buf[ 64 ];
time_t now = time(NULL);
char str[ 26 ];
WSADATA wsaData;
WSAStartup(MAKEWORD(2,2), &wsaData);
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_INET; /* Allow IPv4 */
hints.ai_socktype = SOCK_STREAM; /* Stream socket */
hints.ai_flags = AI_CANONNAME; /* Return canonical name */
rv = getaddrinfo("www.google.com", "http", &hints, &result);
if (rv != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
exit(1);
}
/* Create socket */
sockfd = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
if (sockfd == -1) {
perror("socket");
exit(1);
}
/* Connect */
if (connect(sockfd, result->ai_addr, result->ai_addrlen) == -1) {
perror("connect");
exit(1);
}
/* Get time */
snprintf(buf, sizeof(buf), "GET / HTTP/1.0\r\n\r\n");
send(sockfd, buf, strlen(buf), 0);
recv(sockfd, buf, sizeof(buf), 0);
ctime_s( str, 26, &now );
snprintf(buf, sizeof( buf ), "Current time: %s", str );
closesocket(sockfd);
freeaddrinfo(result);
hb_retc( buf );
}
#pragma ENDDUMP
Kind Regards,
Grigory Filatov
"Everything should be made as simple as possible, but no simpler." Albert Einstein
Grigory Filatov
"Everything should be made as simple as possible, but no simpler." Albert Einstein
Re: how to get date and time from internet
i believed that there is a mistake.
if i change date and time of my pc,
this rutine shows the date and time of mi pc.
if i change date and time of my pc,
this rutine shows the date and time of mi pc.
Re: how to get date and time from internet
NTP demo.
In the aServersNTP variable, define the addresses of the NTP servers from which you want to get the time. To get the shortest latency times possible, it is best to use local servers.
In the aServersNTP variable, define the addresses of the NTP servers from which you want to get the time. To get the shortest latency times possible, it is best to use local servers.
Code: Select all
/* Copyright 2013-2014 Viktor Szakats (vszakats.net/harbour) */
#include "hmg.ch"
#include "hbsocket.ch"
#include "hbver.ch"
PROCEDURE MAIN
Set( _SET_DATEFORMAT, "yyyy.mm.dd" )
DEFINE WINDOW Win_1 ;
AT 0,0 ;
WIDTH 400 ;
HEIGHT 400 ;
TITLE 'NTP DEMO' ;
MAIN
@ 70,70 BUTTON Button_1 CAPTION 'NTP Network Time Protocol' ACTION GetTime() WIDTH 250
END WINDOW
CENTER WINDOW Win_1
ACTIVATE WINDOW Win_1
Return
Function GetTime ()
LOCAL tTime, i := 0, tSystemTime, tLocalTime, tOffset, cNewTime
LOCAL aServersNTP := { "0.africa.pool.ntp.org", "0.pl.pool.ntp.org" ,"1.pl.pool.ntp.org" ,"2.pl.pool.ntp.org" ,"3.pl.pool.ntp.org" , "tempus1.gum.gov.pl", "tempus2.gum.gov.pl", "ntp.task.gda.pl", "0.europe.pool.ntp.org" }
DO WHILE i < Len( aServersNTP )
i ++
WAIT WINDOW "Connecting with " + aServersNTP [i] + ".... " NOWAIT
tTime := hb_ntp_GetTimeUTC( aServersNTP [i], /* port 123 */ , 3000 /* 3 sec */ )
tSystemTime := hb_DateTime()
tLocalTime := tTime + hb_UTCOffset() / 86400
IF !EMPTY(tTime)
EXIT
ENDIF
WAIT WINDOW "Connecting with " + aServersNTP [i] + " no response!" NOWAIT
ENDDO
WAIT CLEAR
IF EMPTY(tTime)
MsgStop ( "Network not available. Check Fire-Wall" )
RETURN
ENDIF
tOffset := tSystemTime - tLocalTime
MsgInfo ( "UTC time: " + hb_valToStr ( tTime ) + " by " + aServersNTP [i] + CRLF + ;
"Local time: " + hb_valToStr ( tLocalTime ) + CRLF + ;
"System time: " + hb_valToStr ( tSystemTime ) + CRLF + ;
"Offset time: " + RoznicaCzasu ( tOffset ) )
RETURN
Function RoznicaCzasu ( tDiff )
Local tRoznica := ABS ( tDiff )
Local cGodzin := Alltrim( Str (INT( hb_NToHour (tRoznica) ), 0, 0) )
Local cMinut := StrZero (INT( hb_NToMin (tRoznica) ) % 60, 2, 0)
Local cSekund := StrZero (INT( hb_NToSec (tRoznica) ) % 60, 2, 0)
Local cMSek := StrZero (( hb_NToMSec (tRoznica) ) % 1000, 3, 0)
RETURN IF( tDiff < 0, "-", "" ) + cGodzin + ":" + cMinut + ":" + cSekund + "." +cMsek
/*
* NTP functions
*
* Copyright 2013 Viktor Szakats (vszakats.net/harbour)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file LICENSE.txt. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA (or visit https://www.gnu.org/licenses/).
*
* As a special exception, the Harbour Project gives permission for
* additional uses of the text contained in its release of Harbour.
*
* The exception is that, if you link the Harbour libraries with other
* files to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the Harbour library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the Harbour
* Project under the name Harbour. If you copy code from other
* Harbour Project or Free Software Foundation releases into a copy of
* Harbour, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for Harbour, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice.
*
*/
FUNCTION hb_ntp_GetTimeUTC( cServer, nPort, nTimeOut )
LOCAL tTime := hb_SToT( "" )
LOCAL hSocket, cBuffer
IF HB_ISSTRING( cServer ) .AND. ! cServer == "" .AND. ;
! Empty( hSocket := hb_socketOpen( , HB_SOCKET_PT_DGRAM ) )
cBuffer := hb_BChar( 8 ) + Replicate( hb_BChar( 0 ), 47 )
IF hb_socketSendTo( hSocket, cBuffer,,, { HB_SOCKET_AF_INET, hb_socketResolveAddr( cServer ), hb_defaultValue( nPort, 123 ) } ) == hb_BLen( cBuffer )
cBuffer := Space( 12 * 4 )
IF hb_socketRecvFrom( hSocket, @cBuffer,,,, hb_defaultValue( nTimeOut, 10000 /* 10s */ ) ) == hb_BLen( cBuffer )
tTime := hb_SToT( "19000101" ) + ;
Bin2U( ntohl( hb_BSubStr( cBuffer, 10 * 4 + 1, 4 ) ) ) / 86400 + ;
( Bin2U( ntohl( hb_BSubStr( cBuffer, 11 * 4 + 1, 4 ) ) ) / ( 2 ^ 32 ) ) / 86400
ENDIF
ENDIF
hb_socketClose( hSocket )
ENDIF
RETURN tTime
STATIC FUNCTION ntohl( c )
IF hb_Version( HB_VERSION_ENDIANNESS ) == HB_VERSION_ENDIAN_LITTLE
RETURN ;
hb_BSubStr( c, 4, 1 ) + ;
hb_BSubStr( c, 3, 1 ) + ;
hb_BSubStr( c, 2, 1 ) + ;
hb_BSubStr( c, 1, 1 )
ENDIF
RETURN c
STATIC FUNCTION Bin2U( c )
LOCAL l := Bin2L( c )
RETURN iif( l < 0, l + ( 2 ^ 32 ), l )
- serge_girard
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Re: how to get date and time from internet
Thanks Edward, interesting! This is all new to me.
There's nothing you can do that can't be done...
- fouednoomen
- Posts: 188
- Joined: Sun Oct 14, 2012 8:33 am
- DBs Used: DBF, MySQL, MariaDB, SQLite, PostgreSQL, Oracle, ODBC
- Location: Tunisia
Re: how to get date and time from internet
Many Thanks Edward ,
-
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Re: how to get date and time from internet
Thank you for your informative post.