如何在.Net Core中间件中获取当前子域？

Question

如何在asp.net 5中获取当前请求的当前子域(在中间件组件中).

我之前使用过以下代码并寻找类似的东西.

public static string GetSubDomain()
        {
            string subDomain = String.Empty;

            if (HttpContext.Current.Request.Url.HostNameType == UriHostNameType.Dns)
            {
                subDomain = Regex.Replace(HttpContext.Current.Request.Url.Host, "((.*)(\\..*){2})|(.*)", "$2").Trim().ToLower();
            }

            if (subDomain == String.Empty)
            {

                subDomain = HttpContext.Current.Request.Headers["Host"].Split('.')[0];
            }

            return subDomain.Trim().ToLower();
        }

Answer 1

在此期间,我设法制定了自己的答案......非常感谢.

private static string GetSubDomain(HttpContext httpContext)
        {
            var subDomain = string.Empty;

            var host = httpContext.Request.Host.Host;

            if (!string.IsNullOrWhiteSpace(host))
            {
                subDomain = host.Split('.')[0];
            }

            return subDomain.Trim().ToLower();
        }