Testing SignalR App in IIS Express

Question

Hello everyone I am using visual Studio 2012 and Developed a simple application for vetting purposes only

However I am stuck because when I try to preview the application, I get the Following Error Message

[PlatformNotSupportedException: This operation requires IIS integrated pipeline mode.]
   System.Web.HttpResponse.get_Headers() +9681446
   System.Web.HttpResponseWrapper.get_Headers() +9
   Microsoft.Owin.Host.SystemWeb.OwinCallContext.CreateEnvironment() +309
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.GetInitialEnvironment(HttpApplication application) +246
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.PrepareInitialContext(HttpApplication application) +15
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContextStage.BeginEvent(Object sender, EventArgs e, AsyncCallback cb, Object extradata) +288
   System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +285
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

Any ideas on what can be done to resolve this

Answer 1

Your Application Pool is in classic mode but your Application need integrated mode to fire. change it to Integrated Mode:

Open IIS Manager

Application Pool

select pool that your app are run in it

In right panel select Basic Setting

Manage Pipeline Mode change to Integrated

Answer 2

I couldn't find that option Visual Studio 2012 (Ultimate) either. Changing the Server to IIS Express on Project Properties->Web tab worked for me though.

Edit: Apparently that option becomes available when switching to IIS Express.

Answer 3

If everything else fails, see if your project has a vwd.webinfo file that sets useClassicPipelineMode.
I never looked at this file before. I did just for fun a few days ago and found the following:

<VisualWebDeveloper>
    <iisExpressSettings windowsAuthentication="enabled" anonymousAuthentication="disabled" useClassicPipelineMode="true" sslPort="44300"/>
</VisualWebDeveloper>

I changed the "useClassicPipelineMode" value and my headaches went away!

Answer 4

Select your web application project, below Solution Explorer there is a Properties window. Select Development Server > ManagedPipelineMode > Integrated