Self hosting nancy with razor returns empty body

Question

Self hosting nancy with razor returns empty body.

I'm trying to self-host nancy in a console application with razor views, however I'm getting an empty body back. It does work when running in IIS.

What I did:

• I added all the appropriate razor configuration and build providers to the App.Config

• I added a custom static root path provider, which seems to be configured well, as static files are served without a problem:

  protected override IRootPathProvider RootPathProvider
  {
      get 
      {
  
          if (ConfigurationManager.AppSettings["RootPath"].HasValue())
          {
              var path = Path.Combine(new FileInfo(Assembly.GetExecutingAssembly().Location).Directory.FullName, ConfigurationManager.AppSettings["RootPath"]); 
  
              return new StaticRootPathProvider(path);
          }
  
          return new DefaultRootPathProvider();            
      }
  }
  

• The razor view is found an being compiled, because when I add invalid code to the view, I do get a razor compiler error

• When I debug with all exceptions caught, I get an exception on serving the page:

A first chance exception of type 'Microsoft.CSharp.RuntimeBinder.RuntimeBinderException' occurred in Nancy.dll

Additional information: Cannot convert type 'Nancy.Responses.Negotiation.Negotiator' to 'Nancy.Response'

Nancy.dll!Nancy.Routing.DefaultRouteInvoker.CastResultToResponse(dynamic result) Unknown Nancy.dll!Nancy.Routing.DefaultRouteInvoker.InvokeRouteWithStrategy(dynamic result, Nancy.NancyContext context) Unknown Nancy.dll!Nancy.Routing.DefaultRouteInvoker.Invoke.AnonymousMethod__5(System.Threading.Tasks.Task completedTask) Unknown Nancy.dll!Nancy.Helpers.TaskHelpers.WhenCompleted(System.Threading.Tasks.Task task, System.Action> onComplete, System.Action> onFaulted, bool execSync) Unknown Nancy.dll!Nancy.Routing.DefaultRouteInvoker.Invoke(Nancy.Routing.Route route, System.Threading.CancellationToken cancellationToken, Nancy.DynamicDictionary parameters, Nancy.NancyContext context) Unknown Nancy.dll!Nancy.Routing.DefaultRequestDispatcher.Dispatch.AnonymousMethod__0(System.Threading.Tasks.Task completedTask) Unknown Nancy.dll!Nancy.Helpers.TaskHelpers.WhenCompleted(System.Threading.Tasks.Task task, System.Action> onComplete, System.Action> onFaulted, bool execSync) Unknown Nancy.dll!Nancy.Routing.DefaultRequestDispatcher.Dispatch(Nancy.NancyContext context, System.Threading.CancellationToken cancellationToken) Unknown Nancy.dll!Nancy.NancyEngine.InvokeRequestLifeCycle.AnonymousMethod__9(System.Threading.Tasks.Task t) Unknown Nancy.dll!Nancy.Helpers.TaskHelpers.WhenCompleted(System.Threading.Tasks.Task task, System.Action> onComplete, System.Action> onFaulted, bool execSync) Unknown Nancy.dll!Nancy.NancyEngine.InvokeRequestLifeCycle(Nancy.NancyContext context, System.Threading.CancellationToken cancellationToken, Nancy.Bootstrapper.IPipelines pipelines) Unknown Nancy.dll!Nancy.NancyEngine.HandleRequest(Nancy.Request request, System.Func preRequest, System.Threading.CancellationToken cancellationToken) Unknown Nancy.dll!Nancy.NancyEngineExtensions.HandleRequest(Nancy.INancyEngine nancyEngine, Nancy.Request request, System.Func preRequest) Unknown Nancy.dll!Nancy.NancyEngineExtensions.HandleRequest(Nancy.INancyEngine nancyEngine, Nancy.Request request) Unknown Nancy.Hosting.Self.dll!Nancy.Hosting.Self.NancyHost.Process(System.Net.HttpListenerContext ctx) Unknown Nancy.Hosting.Self.dll!Nancy.Hosting.Self.NancyHost.GotCallback(System.IAsyncResult ar) Unknown System.dll!System.Net.LazyAsyncResult.Complete(System.IntPtr userToken) Unknown System.dll!System.Net.LazyAsyncResult.ProtectedInvokeCallback(object result, System.IntPtr userToken) Unknown System.dll!System.Net.ListenerAsyncResult.IOCompleted(System.Net.ListenerAsyncResult asyncResult, uint errorCode, uint numBytes) Unknown System.dll!System.Net.ListenerAsyncResult.WaitCallback(uint errorCode, uint numBytes, System.Threading.NativeOverlapped* nativeOverlapped) Unknown mscorlib.dll!System.Threading._IOCompletionCallback.PerformIOCompletionCallback(uint errorCode, uint numBytes, System.Threading.NativeOverlapped* pOVERLAP) Unknown

Then followed by a ArgumentNullException:

System.ArgumentNullException occurred Message: A first chance exception of type 'System.ArgumentNullException' occurred in System.Web.dll Additional information: Value cannot be null.

System.Web.dll!System.Web.HttpContextWrapper.HttpContextWrapper(System.Web.HttpContext httpContext) Unknown System.Web.Optimization.dll!System.Web.Optimization.Styles.Context.get() Unknown System.Web.Optimization.dll!System.Web.Optimization.Styles.RenderFormat(string tagFormat, string[] paths) Unknown Temp_bfd13a3e77214eca9b1ce8f1a37d244d.dll!RazorOutput.RazorView.Execute() Unknown Nancy.ViewEngines.Razor.dll!Nancy.ViewEngines.Razor.NancyRazorViewBase.ExecuteView(string body, System.Collections.Generic.IDictionary sectionContents) Unknown [Lightweight Function]
Nancy.ViewEngines.Razor.dll!Nancy.ViewEngines.Razor.RazorViewEngine.RenderView.AnonymousMethod__26(System.IO.Stream stream) Unknown Nancy.Hosting.Self.dll!Nancy.Hosting.Self.NancyHost.OutputWithDefaultTransferEncoding(Nancy.Response nancyResponse, System.Net.HttpListenerResponse response) Unknown Nancy.Hosting.Self.dll!Nancy.Hosting.Self.NancyHost.ConvertNancyResponseToResponse(Nancy.Response nancyResponse, System.Net.HttpListenerResponse response) Unknown Nancy.Hosting.Self.dll!Nancy.Hosting.Self.NancyHost.Process(System.Net.HttpListenerContext ctx) Unknown Nancy.Hosting.Self.dll!Nancy.Hosting.Self.NancyHost.GotCallback(System.IAsyncResult ar) Unknown System.dll!System.Net.LazyAsyncResult.Complete(System.IntPtr userToken) Unknown System.dll!System.Net.LazyAsyncResult.ProtectedInvokeCallback(object result, System.IntPtr userToken) Unknown System.dll!System.Net.ListenerAsyncResult.IOCompleted(System.Net.ListenerAsyncResult asyncResult, uint errorCode, uint numBytes) Unknown System.dll!System.Net.ListenerAsyncResult.WaitCallback(uint errorCode, uint numBytes, System.Threading.NativeOverlapped* nativeOverlapped) Unknown mscorlib.dll!System.Threading._IOCompletionCallback.PerformIOCompletionCallback(uint errorCode, uint numBytes, System.Threading.NativeOverlapped* pOVERLAP) Unknown

UPDATE:

• That last stack trace seems to imply a problem with AspNet.Web.Optimization, perhaps related to this question:

Can't get System.Web.Optimization to run with Nancy Self Hosting

Answer 1

I would strip everything out of the view accept for a span tag.

<span>Hello</span>

Also I would strip everything out of the bootstrapper except the lines needed for razor.

If this works then you know something else is tripping it up.