asp.net-mvc – 旧版PHP URL不会在MVC中调用自定义路由

我们最近用asp.net MVC网站替换了一个旧的php网站.为了防止来自搜索引擎中遗留网址的404错误,我们通过- http://www.mikesdotnetting.com/Article/108/Handling-Legacy-URLs-with-ASP.NET-MVC设置了自定义遗留路由系统

代码在我的本地计算机上运行,??并重定向到正确的路由;然而,实时服务器发出404.奖金问题/线索,404不是我们的自定义404页面,而是iis 6默认页面.

代码：

public class LegacyUrlRoute: RouteBase
{
    // source: http://www.mikesdotnetting.com/Article/108/Handling-Legacy-URLs-with-ASP.NET-MVC
    public override RouteData GetRouteData(HttpContextBase httpContext)
    {
        const string status = "301 Moved Permanently";
        var request = httpContext.Request;
        var response = httpContext.Response;
        var legacyUrl = request.Url.ToString();
        var newUrl = "";

        if (legacyUrl.Contains(".php"))
        {

            newUrl = "/";
            if (legacyUrl.Contains("support/mailfilter.php"))
                newUrl = "/support/";
            else if (legacyUrl.Contains("/support/default.php"))
                newUrl = "/support/";
            else if (legacyUrl.Contains("/business/default.php"))
                newUrl = "/services/";
            else if (legacyUrl.Contains("/residential/default.php"))
                newUrl = "/services/";
            else if (legacyUrl.Contains("/about/default.php"))
                newUrl = "/home/about/";
            else if (legacyUrl.Contains("/jobs.php"))
                newUrl = "/jobs/";
            else if (legacyUrl.Contains("/support/links.php"))
                newUrl = "/support/";
            else if (legacyUrl.Contains("/support/settings.php"))
                newUrl = "/support/";
            else if (legacyUrl.Contains("/default.php"))
                newUrl = "/";


            response.Status = status;
            response.RedirectLocation = newUrl;
            response.End();
        }
        return null;
    }
    public override VirtualPathData GetVirtualPath(RequestContext requestContext,RouteValueDictionary values)
    {
        return null;
    }
}

注意：

我们怀疑问题是iis无法提供php页面,但我似乎无法找到iis中的设置来解决问题.就好像请求永远不会出现控制器代码,错误或其他情况.所有其他页面/路由工作完美.