How to separate controllers by ports inside selfhosted web service?

[Frank591]

Description of the problem:

I need to separate controllers by ports inside netcore2.0 selfhosted web service.

My configuration
Version of Microsoft.AspNetCore.Mvc : 2.0.1
Selfhosted service using Kestrel.
OS: Linux

Example:
There are 2 ports(p1 and p2) and 3 controllers(c1, c2, c3). Requirement scheme: c1 processes requests from p1, but c2 and c3 will processes requests from p2.

Is it available to do? If yes, them how can i do that?

PS pls mark this issue as question and sorry for my bad English

[mkArtakMSFT]

Thanks for contacting us, @Frank591.
@pranavkm, can you please look into this? Is this somethign we support?

[sebastienros]

If you want the same process (web application) to process all requests, then you need a proxy in front of your application that will handle these. NGinx, HAProxy can do it quite easily.

You can also listen to multiple ports and filter the requests in a middleware. You can use the urls parameter of kestrel to add more input addresses, and I think you can use multiple ports there.

[Frank591]

Thanks for answer, @sebastienros. Variant with load balancers is not available for me. I want to separeate requests inside single app. Can you give some example of middleware, that will sort request between controllers based on input port?

[pranavkm]

You could use an action constraint to do this:

[PortActionConstraint(5000)]
public class HomeController : Controller
{
    ...
}

[AttributeUsage(AttributeTargets.Class)]
public class PortActionConstraint : ActionMethodSelectorAttribute
{
    public PortActionConstraint(int port)
    {
        Port = port;
    }

    public int Port { get; }

    public override bool IsValidForRequest(RouteContext routeContext, ActionDescriptor action)
    {
        var port = routeContext.HttpContext.Request.Host.Port;
        return Port == port;
    }
}

[Frank591]

@pranavkm , thanks for answer! Will try to use that.