using System;
using System.IO;
using System.Net;
using System.Text.RegularExpressions;
namespace RobvanderWoude
{
class WANIP
{
static int Main( string[] args )
{
// These are the URLs the program uses to try and get the computer's WAN IP address; if
// a site fails, the next one is tried; if all fail, their error messages are displayed
string[] urls = { "http://www.robvanderwoude.com/wanip.php", "http://www.robvanderwoude.net/wanip.php", "http://automation.whatismyip.com/n09230945.asp" };
if ( args.Length == 0 )
{
bool found = false;
string errMsg = string.Empty;
string ipPattern = @"^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$";
string myIP = string.Empty;
WebClient myWebClient
= new WebClient
( );
foreach ( string url in urls )
{
if ( !found )
{
try
{
Stream myStream = myWebClient.OpenRead( url );
StreamReader myStreamReader
= new StreamReader
( myStream
); myIP = myStreamReader.ReadToEnd( );
if ( Regex.IsMatch( myIP, ipPattern ) )
{
Console.WriteLine( myIP );
found = true;
}
else
{
errMsg = errMsg + "\n\nThe URL did not return a valid IP address: " + url;
}
}
catch ( Exception e )
{
errMsg = errMsg + "\n\n" + e.Message + " (" + url + ")";
}
}
}
if ( found )
{
return 0;
}
else
{
if ( !String.IsNullOrEmpty( errMsg ) )
{
Console.Error.WriteLine( errMsg );
}
return 1;
}
}
else
{
Console.Error.WriteLine( );
Console.Error.WriteLine( "WANIP.exe, Version 1.02" );
Console.Error.WriteLine( "Return the computer's WAN IP address" );
Console.Error.WriteLine( );
Console.Error.WriteLine( "Usage: WANIP" );
Console.Error.WriteLine( );
Console.Error.WriteLine( "Note: The program tries " + urls.Length + " different URLs to get the WAN IP address" );
Console.Error.WriteLine( );
Console.Error.WriteLine( "Written by Rob van der Woude" );
Console.Error.WriteLine( "http://www.robvanderwoude.com" );
return 1;
}
}
}
}
//csharp/7356