Nancy.ErrorHandling.IStatusCodeHandler implementation example (Rendering as Razor View error page)

Startup.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using System.Reflection;
using System.Text;
using System.Web;


using CustomerWanso.Defined;
using CustomerWanso.Secutiry;

using Nancy;
using Nancy.Extensions;
using Nancy.Bootstrappers.Ninject;
using Nancy.ViewEngines;
using Nancy.ErrorHandling;

namespace CustomerWanso
{
    /// <summary>
    /// 404 및 500 오류 페이지 등을 표시하기 위한 상태 처리기 구현
    /// </summary>
    public class PageStatusHandler : IStatusCodeHandler
    {

        private readonly IViewFactory factory;

        private readonly IDictionary<HttpStatusCode, string> errorpages = new Dictionary<HttpStatusCode, string>
        {
            { HttpStatusCode.NotFound, "404.cshtml" },
            { HttpStatusCode.InternalServerError, "500.cshtml" },
        };

        public PageStatusHandler(IViewFactory factory)
        {
            this.factory = factory;
        }

        public bool HandlesStatusCode(HttpStatusCode statusCode, NancyContext context)
        {
            return this.errorpages.Keys.Any(s => s == statusCode);
        }

        public void Handle(HttpStatusCode statusCode, NancyContext context)
        {
            if (context.Response != null && context.Response.Contents != null && !ReferenceEquals(context.Response.Contents, Response.NoBody))
            {
                return;
            }

            string errorPage;

            if (!this.errorpages.TryGetValue(statusCode, out errorPage))
            {
                return;
            }

            if (string.IsNullOrEmpty(errorPage))
            {
                return;
            }

            ModifyResponse(statusCode, context, errorPage);
        }

        private void ModifyResponse(HttpStatusCode statusCode, NancyContext context, string errorPage)
        {
            var response = factory.RenderView("Views/Error/" + errorPage, new { Exception = context.GetExceptionDetails(), StatusCode = (int)statusCode }, new ViewLocationContext { Context = context });

            response.StatusCode = statusCode;
            context.Response = response;
        }
    }
}