using System;
using System.IO;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Cors;
using Microsoft.AspNetCore.Mvc;

namespace TestServer.Controllers
{
    [EnableCors("AllowAll")]
    [Route("api/[controller]")]
    public class DataController : Controller
    {
        // GET api/data
        [HttpGet]
        public FileContentResult Get()
        {
            var bytes = new byte[byte.MaxValue + 1];
            for (int i = 0; i <= byte.MaxValue; i++)
            {
                bytes[i] = (byte)i;
            }

            return File(bytes, "application/octet-stream");
        }

        // POST api/data
        [HttpPost]
        public async Task<IActionResult> PostAsync()
        {
            var ms = new MemoryStream();
            await Request.Body.CopyToAsync(ms);
            var bytes = ms.ToArray();
            Array.Reverse(bytes);

            for (int i = 0; i <= byte.MaxValue; i++)
            {
                if (bytes[i] != (byte)i)
                {
                    return BadRequest();
                }
            }

            return File(bytes, "application/octet-stream");
        }
    }
}