How to get IIS to recognize OWIN startup class?

c# iis owin
LSpencer777 picture LSpencer777 · Nov 18, 2013 · Viewed 32.9k times · Source

My OWIN web service runs beautifully in Visual Studio 2013, but when I publish it to a real IIS site, it acts as if the Configuration method in the startup class has not been run. I can do "normal" things like browse to the app and see the directory structure, but nothing that was supposedly set up with the IAppBuilder is functional. For example, I get a 404.0 error when I browse to a URL that was set up in Startup to issue an OAuth2 bearer token. It's as if Startup.Configuration(IAppBuilder app) was never run.

I'm using the [assembly: OwinStartup(typeof(MyNamespacedStartupClass))] attribute to designate the startup class.

I've used NuGet to get both Microsoft.Owin.Host.SystemWeb and Microsoft.Owin.Diagnostics per instructions I've seen, but that doesn't make a difference.

What more do I have to do?

Answer

Praburaj picture Praburaj · Nov 19, 2013
  1. Make sure your app pool is in v4.0 integrated mode.
  2. Make sure you have bin placed Microsoft.Owin.Host.SystemWeb (I see you have installed it) - Just make sure its also in the bin folder.

This article will have more information on how an OWIN middleware runs on Integrated pipeline.

Related questions

Convert Web API to use Self Hosting

I am trying to convert an existing ASP.NET Web API project (currently hosted in IIS) into one that can use the SelfHost framework. I'm a bit fuzzy on the actual details but understand I can run a self-host server …

Read More
Access to the path is denied

I'm trying to save an image to a folder in .NET C# but I get this exception: Access to the path 'C:\inetpub\wwwroot\mysite\images\savehere' is denied.The error occured at mscorlib because at System.IO.__Error.WinIOError(…

Read More
An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode

I Installed DotNetOpenAuth SDK-3.4.5.10201.vsix and I can't get it working. It works locally (when I run as localhost) but when i try to publish it ain't working. The IIS error message I get is Error Summary HTTP Error 500.22 - …

Read More