ASP.net MVC4 WebApi route with file-name in it

I'm trying to get the following (and similar) urls to work in my ASP.net MVC4/WebApi project:

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The route responsible for this url looks like this:

config.Routes.MapHttpRoute(
name: "Nav",
routeTemplate: "api/nav/{project}/{assembly}/{namespace}/{type}/{member}",
defaults: new { controller = "Nav", assembly = RouteParameter.Optional, @namespace = RouteParameter.Optional, type = RouteParameter.Optional, member = RouteParameter.Optional }
);

It works just fine if I remove the . in the file-name, or if I add a slash behind the URL, but that also means I can't use the `Url.Route`-methods etc. The error I get is a generic 404-error (image below).

![enter image description here][1]

I've tried adding `<httpRuntime targetFramework="4.5" relaxedUrlToFileSystemMapping="true" />` to my web.config, and I've also tried adding

<compilation debug="true" targetFramework="4.5">
<buildProviders>
<remove extension=".dll"/>
<remove extension=".exe"/>
</buildProviders>
</compilation>

And none of it seems to work. So my question is basically, how can I get this URL to work, and map correctly?


[1]:

Found it. What's needed is this (and maybe some of the things I've added above in the original post):

<system.webServer>
<modules runAllManagedModulesForAllRequests="true" />
</system.webServer>

You could add the following handler to the `<handlers>` section of your `<system.webServer>`:

<add
name="ManagedDllExtension"
path="api/nav/*/*.dll"
verb="GET"
type="System.Web.Handlers.TransferRequestHandler"
preCondition="integratedMode,runtimeVersionv4.0"
/>

This will make all requests containing `.dll` be served through the managed pipeline. Also notice how I have limited them only to the GET verb to limit the performance impact.

My trade off was to append `/end` to the end of route. `.`'s are ignored before the last `/`.

The equivalent URL would be _http://127.0.0.1:81/api/nav/SpotiFire/SpotiFire.dll/end_.

The benefit being that you don't get a performance hit on your assets.