fun-with-minimal-api

Inspired by MediatR and FastEndpoints I wanted to do some experimenting to see if it was possbile to build something with a nice API that could hook directly into ASP.NET Core Minimal API.

The goal was to get to something like this:

app.UseEndpointHandler<HelloWorld>("/hello", HttpMethod.Get);

Which would route requests directly to a HelloWorld handler, which needs to be registered as a service.

builder.Services.AddScoped<HelloWorld>();

All handlers take a request object witch is deserialized from the (RouteValues and QueryString) or the body as JSON. As im writing this - I have not found a good way of combining all three sources into a single request object.

public class HelloWorld : IHandler<HelloWorld.Nothing?, HelloWorld.Response>
{
    public Task<Response> HandleAsync(Nothing? request, CancellationToken cancellationToken)
    {
        return Task.FromResult(new Response("world"));
    }

    public sealed class Nothing {}

    public sealed class Response
    {
        public string Hello { get; }

        public Response(string hello)
        {
            Hello = hello;
        }
    }
}