Can't change destination controller/action via IRouter - asp.net-core

Question

I have simple MyRouter:
public class MyRouter : IRouter
{
private readonly IRouteBuilder _routeBuilder;
public MyRouter(IRouteBuilder routeBuilder)
{
_routeBuilder = routeBuilder;
}
public async Task RouteAsync(RouteContext context)
{
if (ShouldReroute(...))
{
SetNeededPath(context, reroute);
}
await GetDefaultRouter().RouteAsync(context);
}
private bool ShouldReroute(...)
{
return true;
}
public VirtualPathData GetVirtualPath(VirtualPathContext context)
{
return GetDefaultRouter().GetVirtualPath(context);
}
private IRouter GetDefaultRouter()
{
return _routeBuilder.DefaultHandler;
}
private void SetNeededPath(RouteContext context, Reroute reroute)
{
context.RouteData.Values.Clear();
context.RouteData.Values["action"] = "StoreContacts";
context.RouteData.Values["controller"] = "Information";
}
}
As you can see it should change the destination of the request to:
[Route("")]
public class InformationController : Controller
{
[Route("StoreContacts")]
public IActionResult StoreContacts()
{
return View();
}
}
The routers description in Startup.cs is:
app.UseMvc(routes =>
{
routes.MapRoute(
name: "areas",
template: "{area:exists}/{controller=Home}/{action=Index}");
routes.MapRoute(
name: "default",
template: "{controller=Home}/{action=Index}/{id?}");
routes.Routes.Add(new MyRouter(routes));
});
So in my brain, it should redirect all unmapped requests like mysite.com/unexistingRoute should go to InformationController.StoreContacts, but I get only 404.
Also the mysite.com/StoreContacts is available via the direct URL.

Answer 1

Attribute routing will take over conventional routing , so you can remove the attribute routing :
public class InformationController : Controller
{
public IActionResult StoreContacts()
{
return View();
}
}
And move your logic into custom route via IRouter . mysite.com/unexistingRoute won't map to existed route template config in Startup.cs . So remove attribute should work in your scenario . To map other url like mysite.com/OtherAction , you can write custom logic like :
if (context.HttpContext.Request.Path.Value.StartsWith("/StoreContacts"))
{
context.RouteData.Values["controller"] = "Information";
context.RouteData.Values["action"] = "StoreContacts";
}