Retrieving Route Data from Virtual Path in MVC Router

[vezaynk]

I am working on an .NET Core MVC application which requires alternative controller/action names to be allowed. To accomplish this, I am using my own Router on a MapRoute:

app.UseMvc(routes =>
        {
            routes.Routes.Add(new CustomRouter(routes.DefaultHandler));
            routes.MapRoute(
                name: "default",
                template: "{controller=Home}/{action=Index}/{id?}");
        });

My custom router observes the requested controller and action, and based on it places a new value into the RouteData in the request:

public async Task RouteAsync(RouteContext context)
{
   [...]
   if (requestedAction == "fakeAction")
    context.RouteData.Values["action"] = "realAction";

However, to determine the value of the requestedAction, I am basically taking the requested path, splitting it and getting the value of it that way. This seems suboptimal.

What I would like to do would look something like this:

var rr = new RouteBuilder(app);
var myRoute = rr.MapRoute(...).Build();
var myRouteData = myRoute.GetRouteData(context);
myRouteData["action"] == "fakeAction";

Another solution to this problem which I would very much enjoy is if I could do the following:

   app.UseMvc(routes =>
        {
            routes.MapRoute(
                name: "something",
                template: "{controller=Home}/{action=Index}/{id?}");
            routes.Routes.Add(new CustomRouter(routes.DefaultHandler));
            routes.MapRoute(
                name: "default",
                template: "{controller=Home}/{action=Index}/{id?}");
        });

But NOT have my something route actually route anything and only serve as a way to define the RouteData for my CustomRouter.

Is either of these possible? I do not like the idea us uncleanly implementing existing functionality as it is a both a code smell and a potential maintenance difficulty in the future.

[Eilon]

This issue was moved to aspnet/Routing#823