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cassini-dev

Does Cassini DevServer support Integrated Pipeline mode?

This is something I did not manage to find from the internet.

We have a web application that uses SignalR that requires Owin that needs IIS Integrated Pipeline mode. When I am running our web application on Cassini Dev Server I get following error:

[PlatformNotSupportedException: This operation requires IIS integrated pipeline mode.]
   System.Web.HttpResponse.get_Headers() +214
   Microsoft.Owin.Host.SystemWeb.CallHeaders.AspNetResponseHeaders..ctor(HttpResponseBase response) +37
   Microsoft.Owin.Host.SystemWeb.OwinCallContext.CreateEnvironment() +492
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.GetInitialEnvironment(HttpApplication application) +263
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.PrepareInitialContext(HttpApplication application) +19
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContextStage.BeginEvent(Object sender, EventArgs e, AsyncCallback cb, Object extradata) +462
   System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +556
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +288

Running IIS Express and other alternatives in automatic tests is PITA.

Solution

  • CassiniDev does not support Integrated Pipeline Mode. If you're coming across this error you may want to switch to IISExpress. I did that by using the solution posted here.