Relative path of you Page or the Link will be same irrespective of the Zone from which the user access the Site. All you need to change in the URL is the host name part.
You can get the URL for any Zone with the Following code
SPContext.Current.Site.WebApplication.GetResponseUri(Microsoft.SharePoint.Administration.SPUrlZone.Default).AbsoluteUri
Ive implemented url redirecting with MOSS using the HTTP module route. I documented the code I used and what parameters worked the best for me here;
http://scaredpanda.com/2008/08/url-rewriting-with-sharepoint-moss-2007/
Take a look and let me know if this helps you and if you have any questions.
Update: The link above is no longer valid, so here text from the page that I used for URL redirect.
After messing around for a little bit it, I came up with a good way to do it. When I was looking for examples on the web there were a lot of people saying that it couldnt be done. But in the end it actually didn’t take much to implement it. Here’s an HttpModule that I wrote to do the work.
The key pieces are the this.app.BeginRequest += new EventHandler(app_BeginRequest) which
steps in front of the request and allows the module to get its redirect on.
And HttpContext.Current.RewritePath(redirect, false); will push the necessary headers n such forward so that the receiving .aspx page will understand how to correctly post back.
using System;
using System.Data;
using System.Data.SqlClient;
using System.Reflection;
using System.Collections;
using System.Text;
using System.Web;
using System.Web.Caching;
using System.Web.SessionState;
using System.Security.Cryptography;
using System.Configuration;
using System.Threading;
using System.IO;
using System.Security;
using System.Security.Principal;
namespace ScaredPanda
{
public sealed class RewriteHttpModule : IHttpModule
{
HttpApplication app = null;
///
/// Initializes the httpmodule
///
public void Init(HttpApplication httpapp)
{
this.app = httpapp;
this.app.BeginRequest += new EventHandler(app_BeginRequest);
}
public void app_BeginRequest(Object s, EventArgs e)
{
try
{
//determine if the income request is a url that we wish to rewrite.
//in this case we are looking for an extension-less request
string url = HttpContext.Current.Request.RawUrl.Trim();
if (url != string.Empty
&& url != "/"
&& !url.EndsWith("/pages")
&& !url.Contains(".aspx")
&& url.IndexOf("/", 1) == -1)
{
//this will build out the the new url that the user is redirected
//to ie pandas.aspx?pandaID=123
string redirect = ReturnRedirectUrl(url.Replace("/", ""));
//if you do a HttpContext.Current.RewritePath without the 'false' parameter,
//the receiving sharepoint page will not handle post backs correctly
//this is extremely useful in situations where users/admins will be doing a
//'site actions' event
HttpContext.Current.RewritePath(redirect, false);
}
}
catch (Exception ex)
{
//rubbish
}
}
}
}
Best Answer
The solution for Multiple languages in the current version of SharePoint (WSS3/MOSS2007) is to use variations as you've already configured. But this works by having seperate Site hierarchies which require diffenrent URLs
From the SDK documentation for the next version (WSS4/SP2010) it seems as if SharePoint will support different languages for the same Site