asp.net core MVC 過濾器之ActionFilter過濾器(2)

public class ActionFilter : IActionFilter
{
 public void OnActionExecuted(ActionExecutedContext context)
 {
 Console.WriteLine("action執(zhí)行之后");
 }

 public void OnActionExecuting(ActionExecutingContext context)
 {
 Console.WriteLine("action執(zhí)行之前");
 }
}

[HttpGet]
public ActionResult Get()
{
 if (!ModelState.IsValid) return BadRequest("參數(shù)錯(cuò)誤!");
}

public void OnActionExecuting(ActionExecutingContext context)
{
 if (context.ModelState.IsValid) return;

 var modelState = context.ModelState.FirstOrDefault(f => f.Value.Errors.Any());
 string errorMsg = modelState.Value.Errors.First().ErrorMessage;
 throw new AppException(errorMsg);
}

public class ActionFilter : IActionFilter
{
 public void OnActionExecuted(ActionExecutedContext context)
 {
 var httpContext = context.HttpContext;
 var stopwach = httpContext.Items[Resources.StopwachKey] as Stopwatch;
 stopwach.Stop();
 var time = stopwach.Elapsed;

 if (time.TotalSeconds > 5)
 {
 var factory = context.HttpContext.RequestServices.GetService<ILoggerFactory>();
 var logger = factory.CreateLogger<ActionExecutedContext>();
 logger.LogWarning($"{context.ActionDescriptor.DisplayName}執(zhí)行耗時(shí):{time.ToString()}");
 }
 }

 public void OnActionExecuting(ActionExecutingContext context)
 {
 var stopwach = new Stopwatch();
 stopwach.Start();
 context.HttpContext.Items.Add(Resources.StopwachKey, stopwach);
 }
}

services.AddMvc(options =>
 {
 options.Filters.Add<ActionFilter>();
 });