(Objective-C) Query NTP Server for Current Date/Time

Demonstrates how to query an NTP server to get the current date/time.

Note: This feature was added in Chilkat v9.5.0.96.

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#import <CkoJsonObject.h>
#import <CkoDateTime.h>

// Specify the NTP server domain.
// Information is passed in a JSON object to allow for any unanticipated future optional information that might need to be provided.
CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json UpdateString: @"ntp_server" value: @"pool.ntp.org"];

// Query the NTP server for the current date/time.
CkoDateTime *dt = [[CkoDateTime alloc] init];
// Note: The SetFromNtpServer method is available starting in v9.5.0.96 for most Chilkat builds, but not all.
// If the SetFromNtpServer method is not present, contact support@chilkatsoft.com for a hotfix build.
// It should be available in all programming languages/platforms starting in v9.5.0.97
BOOL success = [dt SetFromNtpServer: [json Emit]];
if (success == NO) {
    NSLog(@"%@",dt.LastErrorText);
    return;
}

// Show the date/time in various formats..
BOOL bLocalTime = YES;
NSLog(@"%@",[dt GetAsTimestamp: bLocalTime]);
NSLog(@"%@",[dt GetAsRfc822: bLocalTime]);
NSLog(@"%d",[dt GetAsUnixTime: bLocalTime]);

// Sample output:

// 2023-10-31T09:43:27-05:00
// Tue, 31 Oct 2023 09:43:27 -0500
// 1698745407