How to enable OWIN logging on Windows 7

Question

I am trying to implement logging into my OWIN self hosting solution. My `MiddleWare` class is as follows: ``` public class HostingMiddleware : OwinMiddleware { private readonly ILogger _logger; public HostingMiddleware(OwinMiddleware next, IAppBuilder builder) : base(next) { _logger = builder.CreateLogger<HostingMiddleware>(); } public override Task Invoke(IOwinContext context) { _logger.WriteVerbose(string.Format("{0} {1}: {2}")); context.Response.Headers.Add("Content-Type", new[] { "text/plain" }); return Invoke(context); } } ``` I then use this in my `Startup` class. ``` public class Startup { public void Configuration(IAppBuilder builder) { // Initialize the configuration for Web API self-host. HttpConfiguration config = new HttpConfiguration(); // Map the default Web API HTTP Route config.Routes.MapHttpRoute( name: "DefaultApi", routeTemplate: "api/{controller}/{id}", defaults: new { id = RouteParameter.Optional } ); // Use Web API builder.UseWebApi(config); builder.Use<HostingMi…

Accepted Answer

You need to use `Next.Invoke(context)` and not what you are doing.

Also you had a "bug" in the logging - I don't know what did you want to log so - I add my own.

Good luck with oWin - I love it.

```
public class HostingMiddleware : OwinMiddleware
{
    private readonly ILogger _logger;

public HostingMiddleware(OwinMiddleware next, IAppBuilder builder)
        : base(next)
    {
        _logger = builder.CreateLogger();
    }

public async override Task Invoke(IOwinContext context)
    {
        _logger.WriteVerbose(string.Format("{0} --- {1}", context.Request.Uri.AbsolutePath, context.Request.QueryString);
        await Next.Invoke(context);
    }
}
```

you must read this: Understanding OWIN, Katana, and the Middleware Pipeline

How to enable OWIN logging on Windows 7

Solution

Problem