SwaggerUI not working with API versioning - asp.net-web-api

Question

I'm trying to use SwaggerUI, but I'm having some problems.
When I call http://mysite.com/api/swagger I get this:
{
"apiVersion":"4.0.0.0",
"swaggerVersion":"2.0",
"basePath":"http://mysite.com",
"resourcePath":null,
"apis":
[
{
"path":"/api/docs/V1.Foo",
"description":"Foo V1.",
"operations":[]
},
{
"path":"/api/docs/V2.Foo",
"description":"Foo V2.",
"operations":[]
}
]
}
But, when I call http://mysite.com/api/docs/V1.Foo or http://mysite.com/api/docs/V2.Foo I get this:
<Error>
<Message>
The requested resource does not support http method 'GET'.
</Message>
</Error>
It look like I'm calling my API, but I'm trying to get the API documentation.
All my controllers implement System.Web.Http.ApiController.
This is my WebApiConfig:
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
RouteTable.Routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
config.Routes.MapHttpRoute(
name: "SwaggerApi",
routeTemplate: "api/docs/{controller}",
defaults: new { swagger = true }
);
config.Routes.MapHttpRoute(
name: "Swagger",
routeTemplate: "api/swagger",
defaults: new { controller = "swagger" }
);
config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{version}/{controller}/{id}",
defaults: new { id = RouteParameter.Optional, version = "v1" }
);
config.Filters.Add(new SwaggerActionFilter());
try
{
config.Services.Replace(typeof(IDocumentationProvider),
new XmlCommentDocumentationProvider(HttpContext.Current.Server.MapPath("~/bin/XmlDocument.XML")));
}
catch (FileNotFoundException)
{ }
//My version selector
config.Services.Replace(typeof(IHttpControllerSelector), new VersionControllerSelector(config));
config.Filters.Add(new VersionNoHeaderAttribute());
}
}
And this is my IHttpControllerSelector implementation (VersionControllerSelector):
...
public HttpControllerDescriptor SelectController(HttpRequestMessage request)
{
var routeData = request.GetRouteData();
if (routeData == null)
{
throw new HttpResponseException(HttpStatusCode.NotFound);
}
string version;
if (GetRouteVariable<bool>(routeData, "swagger"))
{
version = ""; // Here I have the version and controller name.
}
else if (request.RequestUri.ToString().ToLower().EndsWith("swagger"))
{
version = "net."; // Net.Swagger
}
else
{
version = GetRouteVariable<string>(routeData, VersaoKey);
if (version == null)
{
throw new HttpResponseException(HttpStatusCode.NotFound);
}
version = string.Format(CultureInfo.InvariantCulture, "{0}.", version); // V1.MyControler
}
var controllerName = GetRouteVariable<string>(routeData, ControllerKey);
if (controllerName == null)
{
throw new HttpResponseException(HttpStatusCode.NotFound);
}
var key = version + controllerName;
HttpControllerDescriptor controllerDescriptor;
if (_controllers.Value.TryGetValue(key, out controllerDescriptor))
{
return controllerDescriptor;
}
throw new HttpResponseException(HttpStatusCode.NotFound);
}
...
SwaggerActionFilter doesn't get my request when I call http://mysite.com/api/docs/"some-controller".
If I use SwaggerUI in another Solution without versioning, I'm able to get all documentations.
I know that maybe my versioning selector is wrong, but I dont't know what is wrong.