public MoMoBotExceptionMiddleware(RequestDelegate next,
                                          MoMoBotExceptionMiddlewareOptions options)
        {
            _next    = next;
            _options = options;

            _exceptionStatusCodeDic = new Dictionary <int, string>
            {
                { 401, "未授权的请求" },
                { 404, "找不到该页面" },
                { 403, "访问被拒绝" },
                { 500, "服务器发生意外的错误" }
                //其余状态自行扩展
            };
        }
 public static IApplicationBuilder UseMoMoExceptionHandler(this IApplicationBuilder app, MoMoBotExceptionMiddlewareOptions options = null) =>
 app.UseMiddleware <MoMoBotExceptionMiddleware>(options ?? MoMoBotExceptionMiddlewareOptions.Default);