Hi Bob,

Good summary, Bob.  It summarizes nicely the issues that I’m dealing with in 
creating a client-side student helper app.  Your RealTime function works 
nicely.  The only thing missing is the year, which again, is something that a 
user could set manually.

Regards,

Gregory



On Tue, Aug 16, 2011, at 11:44 AM, use-livecode-requ...@lists.runrev.com wrote:

> Message: 1
> Date: Mon, 15 Aug 2011 17:04:42 -0700
> From: Bob Sneidar <b...@twft.com>
> To: How to use LiveCode <use-livecode@lists.runrev.com>
> Subject: Re: Grabbing the Date and Time From a Time Server on the
>       Internet
> Message-ID: <71dfe006-b408-43b4-8cec-ab4f1fe20...@twft.com>
> Content-Type: text/plain; charset=us-ascii
> 
> The Internet Date returns the date and time, along with the current time zone 
> set in your preferences. If the user changes his date and time manually 
> though, it will faithfully return whatever the user enters. Querying a time 
> server on the internet will always return the real date and time. 
> 
> Suppose you had a trial scheme which expired the license after 30 days. The 
> easiest way to defeat that would be to always set the clock back whenever you 
> used the software. But that would be to no avail if you check the RealTime 
> (as I named my function). 
> 
> Also, Windows Clients are sometimes configured to get the date and time from 
> an internal time server running on the network. If that time server service 
> stops functioning and the admin doesn't know it, the time can drift quite a 
> bit aver several weeks. Any app that was critically dependent on knowing the 
> exact time might not work correctly. 
> 
> Someone mentioned that if you were using sql, that you could query the sql 
> server for the date and time. This actually has a real advantage over a time 
> server, as NTP or even HTTP could be blocked by a personal firewall using 
> ports or a blacklist, but no one could firewall off the sql server you need 
> to run your application! 
> 
> Bob

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