Catch all sample controller

CatchAllController.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;

namespace catchall.Controllers
{
    public record CatchAllResponse(string body, string url);

    [ApiController]
    [Route("/api")]
    public class CatchAllController : ControllerBase
    {
        [Route("{**catchAll}")]
        public async Task<CatchAllResponse> Get(string catchAll)
        {
            var reader = new StreamReader(Request.Body);
            var body = await reader.ReadToEndAsync();
            return new CatchAllResponse(body, catchAll);
        }
    }
}