asp.net-mvc – Asp.net mvc 301从www.domain.com重定向到domain

在IIS7中安装HTTP重定向功能是最好的方法.

在我们的例子中,其他约束迫使我们在应用程序层面这样做.

以下是我们在global.asax中执行重定向的代码：

private static readonly Regex wwwRegex = 
        new Regex(@"www.(?<mainDomain>.*)",RegexOptions.Compiled
                      | RegexOptions.IgnoreCase 
                      | RegexOptions.Singleline);

    protected void Application_BeginRequest(Object sender,EventArgs e)
    {
        string hostName = Request.Headers["x-forwarded-host"];
        hostName = string.IsNullOrEmpty(hostName) ? Request.Url.Host : hostName;
        Match match = wwwRegex.Match(hostName);
        if (match.Success)
        {
            string mainDomain = match.Groups["mainDomain"].Value;
            var builder=new UriBuilder(Request.Url)
                            {
                                Host = mainDomain
                            };
            string redirectUrl = builder.Uri.ToString();
            Response.Clear();
            Response.StatusCode = 301;
            Response.StatusDescription = "Moved Permanently";
            Response.AddHeader("Location",redirectUrl);
            Response.End();
        }
    }