public static IHttpRequest Accept(this IHttpRequest request, string type)
        {
            if (string.IsNullOrWhiteSpace(type))
            {
                throw new ArgumentException($"“{nameof(type)}”不能为 null 或空白。", nameof(type));
            }

            return(request.AddNewHeader(HttpHeaderDefinitions.Accept, type));
        }
 public static IHttpRequest AcceptJson(this IHttpRequest request)
 {
     return(request.AddNewHeader(HttpHeaderDefinitions.Accept, JsonContent.ContentType));
 }