using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;

namespace Polly8Study.WebApi.Controllers
{
    [Route("api/[controller]/[action]")]
    [ApiController]
    public class TimeoutController : ControllerBase
    {
        private readonly ILogger<TimeoutController> _logger;
        public TimeoutController(ILogger<TimeoutController> logger) 
        {
            _logger = logger;
        }

        /// <summary>
        /// 快速接口
        /// </summary>
        /// <returns></returns>
        [HttpGet]
        public IActionResult Fast()
        {
            return Ok("Fast");
        }

        /// <summary>
        /// 慢接口：耗时约2秒
        /// </summary>
        /// <returns></returns>
        [HttpGet]
        public async Task<IActionResult> Slow(CancellationToken token)
        {
            //使用“异常过滤器”, 全局统一处理
            try
            {
                await Task.Delay(1000*2, token);

                return Ok("Slow");
            }
            catch (OperationCanceledException ex)
            {
                Console.WriteLine("用户取消操作：" + ex.Message);

                throw;
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);

                return Problem("服务器异常");
            }
            finally
            {
                Console.WriteLine("请求结束");
            }
        }
    }
}