DelegatingHandler not executing ASP.Net Web Api

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today i encountered a strange behavior in my Web Api application

protected void Application_Start() {

    FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
    RouteConfig.RegisterRoutes(RouteTable.Routes);
    GlobalConfiguration.Configuration
        .MessageHandlers.Add(new DummyMessageHandler());
}

And my DelegatingHandler looks like this.

public class DummyMessageHandler : DelegatingHandler {

    protected override Task<HttpResponseMessage> SendAsync(
        HttpRequestMessage request, CancellationToken cancellationToken) {

*       if (request.Headers.Authorization.Scheme == "Basic")
            Thread.CurrentPrincipal = new GenericPrincipal(
                new GenericIdentity("Authenticated"), new string[0]);

        return base.SendAsync(request, cancellationToken);
    }
}

The problem I encountered was that the delegating handlers are not being executed. I have a breakpoint in the line marked with a * and the execution of my code never stops there.

My nuget packages.config is the following:

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Microsoft.AspNet.Mvc" version="4.0.20710.0" targetFramework="net40" />
  <package id="Microsoft.AspNet.Razor" version="2.0.20710.0" targetFramework="net40" />
  <package id="Microsoft.AspNet.Web.Optimization" version="1.0.0" targetFramework="net40" />
  <package id="Microsoft.AspNet.WebApi" version="4.0.20710.0" targetFramework="net40" />
  <package id="Microsoft.AspNet.WebApi.Client" version="4.1.0-alpha-120809" targetFramework="net40" />
  <package id="Microsoft.AspNet.WebApi.Core" version="4.0.20710.0" targetFramework="net40" />
  <package id="Microsoft.AspNet.WebApi.WebHost" version="4.0.20710.0" targetFramework="net40" />
  <package id="Microsoft.AspNet.WebPages" version="2.0.20710.0" targetFramework="net40" />
  <package id="Microsoft.Net.Http" version="2.0.20710.0" targetFramework="net40" />
  <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net40" />
  <package id="Newtonsoft.Json" version="4.5.8" targetFramework="net40" />
  <package id="WebGrease" version="1.1.0" targetFramework="net40" />
</packages>

I'm looking at this for a long time, can you point me to something I am missing ? Thank you

2 Answers
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