如何在 ASP.net MVC web api 中使请求超时答案

【问题标题】：How to timeout a request in ASP.net MVC web api如何在 ASP.net MVC web api 中使请求超时
【发布时间】：2019-09-03 21:25:46
【问题描述】：

我的应用程序正在运行 ASP.Net MVC 5.2.2 并托管在 IIS 7 集成管道上。当请求的持续时间超过 3 分钟时，我希望超时请求。设置httpRuntime.executionTimeout 没有帮助。

我有其他 ASP.Net 应用程序在 IIS 6 classic mode 中运行。当请求持续时间超过 httpRuntime.executionTimeout 值时，Asp.Net 会自动抛出 ThreadAbortException。

我试图查看 ASP.Net 源代码并找到 RequestTimeoutManager。它基本上跟踪所有初始化的 HttpRequest，后台任务中止超过超时持续时间的请求。 RequestTimeoutManager 是否适用于 ASP.Net MVC Web Api？如果不是，如何实现类似的东西。

我的应用程序中典型 Http 请求的堆栈跟踪

   at MyApp.Api.Controllers.Controller.GetDetails(String Id) 
   at lambda_method(Closure , Object , Object[] )
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass13.<GetExecutor>b__c(Object instance, Object[] methodParameters)
   at System.Threading.Tasks.TaskHelpers.RunSynchronously[TResult](Func`1 func, CancellationToken cancellationToken)
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)
   at System.Web.Http.Controllers.ApiControllerActionInvoker.<>c__DisplayClass3.<InvokeActionAsync>b__0()
   at System.Threading.Tasks.TaskHelpers.RunSynchronously[TResult](Func`1 func, CancellationToken cancellationToken)
   at System.Web.Http.Controllers.ApiControllerActionInvoker.InvokeActionAsync(HttpActionContext actionContext, CancellationToken cancellationToken)
   at System.Web.Http.Filters.ActionFilterAttribute.System.Web.Http.Filters.IActionFilter.ExecuteActionFilterAsync(HttpActionContext actionContext, CancellationToken cancellationToken, Func`1 continuation)
   at System.Web.Http.Filters.ActionFilterAttribute.System.Web.Http.Filters.IActionFilter.ExecuteActionFilterAsync(HttpActionContext actionContext, CancellationToken cancellationToken, Func`1 continuation)
   at System.Threading.Tasks.TaskHelpersExtensions.ThenImpl[TTask,TOuterResult](TTask task, Func`2 continuation, CancellationToken cancellationToken, Boolean runSynchronously)
   at System.Threading.Tasks.TaskHelpersExtensions.Then[TOuterResult](Task task, Func`1 continuation, CancellationToken cancellationToken, Boolean runSynchronously)
   at System.Web.Http.ApiController.<>c__DisplayClass3.<ExecuteAsync>b__0()
   at System.Web.Http.Filters.AuthorizationFilterAttribute.System.Web.Http.Filters.IAuthorizationFilter.ExecuteAuthorizationFilterAsync(HttpActionContext actionContext, CancellationToken cancellationToken, Func`1 continuation)
   at System.Web.Http.ApiController.ExecuteAsync(HttpControllerContext controllerContext, CancellationToken cancellationToken)
   at System.Web.Http.Dispatcher.HttpControllerDispatcher.SendAsyncInternal(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Web.Http.Dispatcher.HttpControllerDispatcher.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.HttpMessageInvoker.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Web.Http.Dispatcher.HttpRoutingDispatcher.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.DelegatingHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at MyApp.Common.MyAppExceptionHandler.<>n__0(HttpRequestMessage request, CancellationToken cancellationToken)
   at MyApp.Common.MyAppExceptionHandler.<SendAsync>d__1.MoveNext() in C:\MyApp_source\Components\MyAppExceptionHandler.cs
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.Start[TStateMachine](TStateMachine& stateMachine)
   at MyApp.Common.MyAppExceptionHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.DelegatingHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Web.Http.HttpServer.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.HttpMessageInvoker.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Web.Http.WebHost.HttpControllerHandler.BeginProcessRequest(HttpContextBase httpContextBase, AsyncCallback callback, Object state)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step)
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
   at System.Web.HttpApplication.PipelineStepManager.ResumeSteps(Exception error)
   at System.Web.HttpApplication.BeginProcessRequestNotification(HttpContext context, AsyncCallback cb)
   at System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context)
   at System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr rootedObjectsPointer, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)
   at System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr rootedObjectsPointer, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)
   at System.Web.Hosting.UnsafeIISMethods.MgdIndicateCompletion(IntPtr pHandler, RequestNotificationStatus& notificationStatus)
   at System.Web.Hosting.UnsafeIISMethods.MgdIndicateCompletion(IntPtr pHandler, RequestNotificationStatus& notificationStatus)
   at System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr rootedObjectsPointer, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)
   at System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr rootedObjectsPointer, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)

【问题讨论】：

如果使用 async-await，那么您始终可以在异步代码中使用取消令牌，您也可以将来自中间件的请求短路。

标签： asp.net-mvc asp.net-web-api

【解决方案1】：

您可以使用自定义属性覆盖AsyncManager 中的超时值

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method)]
public class CustomAsyncTimeoutAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        if (filterContext == null)
        {
            throw new ArgumentNullException(nameof(filterContext));
        }

        if (!(filterContext.Controller is IAsyncManagerContainer managerContainer))
        {
            throw new InvalidOperationException("Action Filter failed");
        }

        managerContainer.AsyncManager.Timeout = 180000;
        base.OnActionExecuting(filterContext);
    }
}

或者你为什么不能使用[AsyncTimeout(180000)]？

【讨论】：

设置 ScriptTimeout、executionTimeout、requestTimeout 值在 MVC 异步管道中不起作用。 stackoverflow.com/a/27342836/1219543
有趣。我改变了答案。也许它会帮助你。还是您在寻找 IIS 端示例

【解决方案2】：

您可以在 2 个正在运行的任务之间创建竞赛，一个用于主要操作，另一个用于首选超时（例如 3 * 60,000 ms = 180,000 ms) 通过以下代码：

public async Task<HttpResponseMessage> Get() 
{
    var _task = this.DoTask(2000); //your operation required time
    var _timeout = this.SetTimeout(180000); //equal to 3 minutes
    var _finishedTask = await Task.WhenAny(_timeout, _task);
    if (_finishedTask == _timeout)
        return this.Request.CreateResponse(HttpStatusCode.RequestTimeout); //timeout
    else
        return this.Request.CreateResponse(HttpStatusCode.OK, _task.Result); //Ok
}

private async Task<string> DoTask(int duration)
{
    await Task.Delay(duration);
    return "work results";
}

private async Task SetTimeout(int ms)
{
    await Task.Delay(ms);
}

我已经用ApiController 作为基类进行了测试并且工作正常。 较早完成的任务赢得比赛并决定Api结果。

【讨论】：