I have a project include MVC and Web API controllers. I have,
GlobalConfiguration.MessageHandlers.Insert(0, new MessageHandler1());
But when I request a MVC controller it executes this handler. It hurting me because SuppressDefaultHostAuthentication is executing PassiveAuthenticationMessageHandler handler on MVC request. I have put a break-point on MessageHandler1.SendAsync and found that System.Web.HttpContext.Current.Handler = {System.Web.Mvc.MvcHandler} which confirm that it is MVC request.
StackTrace,
MyApp.dll!MyApp.MessageHandler1.SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) Line 120 C#
System.Net.Http.dll!System.Net.Http.DelegatingHandler.SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) Unknown
System.Web.Http.dll!System.Web.Http.Tracing.Tracers.MessageHandlerTracer.AnonymousMethod__FabricatedMethod5() Unknown
System.Web.Http.dll!System.Web.Http.Tracing.Tracers.MessageHandlerTracer.SendAsync.AnonymousMethod__0() Unknown
System.Web.Http.dll!System.Web.Http.Tracing.ITraceWriterExtensions.TraceBeginEndAsync<System.Net.Http.HttpResponseMessage>(System.Web.Http.Tracing.ITraceWriter traceWriter, System.Net.Http.HttpRequestMessage request, string category, System.Web.Http.Tracing.TraceLevel level, string operatorName, string operationName, System.Action<System.Web.Http.Tracing.TraceRecord> beginTrace, System.Func<System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage>> execute, System.Action<System.Web.Http.Tracing.TraceRecord,System.Net.Http.HttpResponseMessage> endTrace, System.Action<System.Web.Http.Tracing.TraceRecord> errorTrace) Unknown
System.Web.Http.dll!System.Web.Http.Tracing.Tracers.MessageHandlerTracer.SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) Unknown
System.Net.Http.dll!System.Net.Http.DelegatingHandler.SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) Unknown
System.Web.Http.dll!System.Web.Http.Tracing.Tracers.RequestMessageHandlerTracer.AnonymousMethod__FabricatedMethod6() Unknown
System.Web.Http.dll!System.Web.Http.Tracing.Tracers.RequestMessageHandlerTracer.SendAsync.AnonymousMethod__1() Unknown
System.Web.Http.dll!System.Web.Http.Tracing.ITraceWriterExtensions.TraceBeginEndAsync<System.Net.Http.HttpResponseMessage>(System.Web.Http.Tracing.ITraceWriter traceWriter, System.Net.Http.HttpRequestMessage request, string category, System.Web.Http.Tracing.TraceLevel level, string operatorName, string operationName, System.Action<System.Web.Http.Tracing.TraceRecord> beginTrace, System.Func<System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage>> execute, System.Action<System.Web.Http.Tracing.TraceRecord,System.Net.Http.HttpResponseMessage> endTrace, System.Action<System.Web.Http.Tracing.TraceRecord> errorTrace) Unknown
System.Web.Http.dll!System.Web.Http.Tracing.Tracers.RequestMessageHandlerTracer.SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) Unknown
System.Net.Http.dll!System.Net.Http.DelegatingHandler.SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) Unknown
System.Web.Http.dll!System.Web.Http.HttpServer.AnonymousMethod__FabricatedMethod9() Unknown
System.Web.Http.dll!System.Web.Http.HttpServer.SendAsync() Unknown
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start<System.Web.Http.HttpServer.SendAsync>(ref System.Web.Http.HttpServer.SendAsync stateMachine) Unknown
mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<System.__Canon>.Start<System.Web.Http.HttpServer.SendAsync>(ref System.Web.Http.HttpServer.SendAsync stateMachine) Unknown
System.Web.Http.dll!System.Web.Http.HttpServer.SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) Unknown
System.Net.Http.dll!System.Net.Http.HttpMessageInvoker.SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) Unknown
System.Web.Http.Owin.dll!System.Web.Http.Owin.HttpMessageHandlerAdapter.InvokeCore() Unknown
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start<System.Web.Http.Owin.HttpMessageHandlerAdapter.InvokeCore>(ref System.Web.Http.Owin.HttpMessageHandlerAdapter.InvokeCore stateMachine) Unknown
mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder.Start<System.Web.Http.Owin.HttpMessageHandlerAdapter.InvokeCore>(ref System.Web.Http.Owin.HttpMessageHandlerAdapter.InvokeCore stateMachine) Unknown
System.Web.Http.Owin.dll!System.Web.Http.Owin.HttpMessageHandlerAdapter.InvokeCore(Microsoft.Owin.IOwinContext context, Microsoft.Owin.IOwinRequest owinRequest, Microsoft.Owin.IOwinResponse owinResponse) Unknown
System.Web.Http.Owin.dll!System.Web.Http.Owin.HttpMessageHandlerAdapter.Invoke(Microsoft.Owin.IOwinContext context) Unknown
Microsoft.Owin.Security.dll!Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Google.GoogleOAuth2AuthenticationOptions>.Invoke() Unknown
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start<Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Google.GoogleOAuth2AuthenticationOptions>.Invoke>(ref Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Google.GoogleOAuth2AuthenticationOptions>.Invoke stateMachine) Unknown
mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<System.Threading.Tasks.VoidTaskResult>.Start<Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Google.GoogleOAuth2AuthenticationOptions>.Invoke>(ref Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Google.GoogleOAuth2AuthenticationOptions>.Invoke stateMachine) Unknown
mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder.Start<Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Google.GoogleOAuth2AuthenticationOptions>.Invoke>(ref Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Google.GoogleOAuth2AuthenticationOptions>.Invoke stateMachine) Unknown
Microsoft.Owin.Security.dll!Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Google.GoogleOAuth2AuthenticationOptions>.Invoke(Microsoft.Owin.IOwinContext context) Unknown
Microsoft.Owin.Security.dll!Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Facebook.FacebookAuthenticationOptions>.Invoke() Unknown
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start<Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Facebook.FacebookAuthenticationOptions>.Invoke>(ref Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Facebook.FacebookAuthenticationOptions>.Invoke stateMachine) Unknown
mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<System.Threading.Tasks.VoidTaskResult>.Start<Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Facebook.FacebookAuthenticationOptions>.Invoke>(ref Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Facebook.FacebookAuthenticationOptions>.Invoke stateMachine) Unknown
mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder.Start<Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Facebook.FacebookAuthenticationOptions>.Invoke>(ref Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Facebook.FacebookAuthenticationOptions>.Invoke stateMachine) Unknown
Microsoft.Owin.Security.dll!Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware<Microsoft.Owin.Security.Facebook.FacebookAuthenticationOptions>.Invoke(Microsoft.Owin.IOwinContext context) Unknown
Microsoft.Owin.dll!Microsoft.Owin.Infrastructure.OwinMiddlewareTransition.Invoke(System.Collections.Generic.IDictionary<string,object> environment) Unknown
Microsoft.Owin.Host.SystemWeb.dll!Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContextStage.BeginEvent(object sender, System.EventArgs e, System.AsyncCallback cb, object extradata) Unknown
System.Web.dll!System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() Unknown
System.Web.dll!System.Web.HttpApplication.ExecuteStep(System.Web.HttpApplication.IExecutionStep step, ref bool completedSynchronously) Unknown
System.Web.dll!System.Web.HttpApplication.PipelineStepManager.ResumeSteps(System.Exception error) Unknown
System.Web.dll!System.Web.HttpApplication.BeginProcessRequestNotification(System.Web.HttpContext context, System.AsyncCallback cb) Unknown
System.Web.dll!System.Web.HttpRuntime.ProcessRequestNotificationPrivate(System.Web.Hosting.IIS7WorkerRequest wr, System.Web.HttpContext context) Unknown
System.Web.dll!System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(System.IntPtr rootedObjectsPointer, System.IntPtr nativeRequestContext, System.IntPtr moduleData, int flags) Unknown
System.Web.dll!System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(System.IntPtr rootedObjectsPointer, System.IntPtr nativeRequestContext, System.IntPtr moduleData, int flags) Unknown
[Native to Managed Transition]
[Managed to Native Transition]
System.Web.dll!System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(System.IntPtr rootedObjectsPointer, System.IntPtr nativeRequestContext, System.IntPtr moduleData, int flags) Unknown
System.Web.dll!System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(System.IntPtr rootedObjectsPointer, System.IntPtr nativeRequestContext, System.IntPtr moduleData, int flags) Unknown
[AppDomain Transition]