dnsever_ddns_updater.cs

using System;
using System.Collections.Generic;
using System.Net;
using System.Net.NetworkInformation;
using System.Text;
using System.Threading;
using System.Windows.Forms;

namespace DdnsUpdater
{
	static class Program
	{
		[STAThread]
		static void Main ()
		{
			Uri url = new Uri ( "http://dyna.dnsever.com/update.php?host[호스트이름]" );
			HttpWebRequest req = HttpWebRequest.CreateHttp ( url );
			while ( true )
			{
				if ( !CheckForInternetConnection () ) { Thread.Sleep ( TimeSpan.FromMinutes ( 1 ) ); continue; }

				req.PreAuthenticate = true;
				req.Credentials = new NetworkCredential ( "사용자ID", "인증코드" ).GetCredential ( url, "Digest" );
				req.UserAgent = "DnsEverDDNSUpdater";
				try { req.GetResponse ().Dispose (); }
				catch { Thread.Sleep ( TimeSpan.FromMinutes ( 1 ) ); continue; }

				Thread.Sleep ( TimeSpan.FromHours ( 12 ) );
			}
		}

		public static bool CheckForInternetConnection ()
		{
			if ( !NetworkInterface.GetIsNetworkAvailable () ) return false;
			try
			{
				using ( var client = new WebClient () )
				{
					using ( var stream = client.OpenRead ( "http://www.google.com" ) ) { return true; }
				}
			}
			catch { return false; }
		}
	}
}