【发布时间】:2018-05-26 13:15:41
【问题描述】:
我有一个服务器,它监听几个客户端发送信息的HTTP POST。我使用 Grapevine 作为http 服务器,因为方法非常简单,不需要 ASP 的复杂性。
有时我会得到这个随机的
错误:
2017-12-12 15:39:25.5642|ERROR|Omnibox_Server.Modelo.HttpServer.Controllers.OpenALPRController|System.Net.HttpListenerException (0x80004005): The I/O operation has been aborted because of either a thread exit or an application request
at System.Net.HttpRequestStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at System.IO.StreamReader.ReadBuffer()
at System.IO.StreamReader.ReadToEnd()
at Grapevine.Interfaces.Server.HttpRequest.get_Payload()
at Omnibox_Server.Modelo.HttpServer.Controllers.OpenALPRController.PostPatente(IHttpContext context)
这是
类/方法:
namespace Omnibox_Server.Modelo.HttpServer.Controllers
{
[RestResource(BasePath = "/openalpr")]
public class OpenALPRController
{
private static readonly Logger Logger = LogManager.GetCurrentClassLogger();
[RestRoute(HttpMethod = HttpMethod.POST, PathInfo = "/patente")]
public IHttpContext PostPatente(IHttpContext context)
{
try
{
context.Response.StatusCode = HttpStatusCode.Ok;
context.Response.ContentType = ContentType.JSON;
context.Response.ContentEncoding = Encoding.UTF8;
var fotoOpenAlpr = JsonConvert.DeserializeObject<FotoOpenALPR>(context.Request.Payload); //<--- exception occurs here? shouldn't try/catch work?
var ip = context.Request.RemoteEndPoint;
if (fotoOpenAlpr.agent_uid != null)
Task.Run(async () =>
{
if (fotoOpenAlpr.is_parked) return;
await fotoOpenAlpr.ObtenerFoto(ip.Address);
try
{
var foto = new Foto(fotoOpenAlpr);
if (foto.IdOmnibox == 0) Logger.Info("Omnibox sin ID con IP " + ip.Address);
await foto.Procesar();
}
catch (Exception e)
{
}
});
context.Response.SendResponse(HttpStatusCode.Ok); //or maybe exception triggers here?
}
catch (Exception e)
{
Logger.Error(e);
}
return context;
}
}
}
在
中产生了一个事件Windows 日志:
Application: Omnibox Server.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.Net.HttpListenerException
at System.Net.HttpResponseStream.Write(Byte[], Int32, Int32)
at Grapevine.Interfaces.Server.HttpResponse.SendResponse(Byte[])
at Grapevine.Server.HttpResponseExtensions.SendResponse(Grapevine.Interfaces.Server.IHttpResponse, System.String)
at Grapevine.Server.Router.Route(System.Object)
at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context(System.Object)
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()
事件查看器中的异常日志和窗口日志具有相同的时间戳。
【问题讨论】:
-
您能告诉我您使用的是什么版本的 Grapevine 吗?
-
嗨,斯科特。 Grapevine 版本是 NuGet 中的最新版本。 4.1.1。我通过将行
context.Response.SendResponse(HttpStatusCode.Ok);移动到 try/catch 下方来解决了这个问题。我认为发生的事情是有时 TCP 管道中断并且有效负载损坏/不完整,因此在尝试获取它时会引发异常,并且因为我没有SendResponse(OK)在 try/catch 之外引发另一个异常,从而破坏了我的服务器.