获取WebSocket错误：使用File.Copy与SignalR时出现网络错误12030

我下载了Sample SignalR Progress Bar解决方案。它模拟服务器上长时间运行的进程，持续更新客户端，使用SignalR。它在IISExpress完美工作，直到我在控制器中添加File.Copy(source, destination, true)我的方法（见下文）。获取WebSocket错误：使用File.Copy与SignalR时出现网络错误12030

public JsonResult LongRunningProcess() 
{ 
    string directory = Server.MapPath("~/bin/") + @"\"; 

    string source = directory + @"Templates\Template.xlsx"; 
    string destination = directory + @"Spreadsheets\output file.xlsx"; 
    System.IO.File.Copy(source, destination, true); 

    for (int i = 0; i <= 50; i++) 
    { 
     Thread.Sleep(500); 
     Functions.SendProgress("Process in progress...", i , 50); 
    } 

    return Json("", JsonRequestBehavior.AllowGet); 
}

现在我收到服务器端的一个WebSocketException：在客户端

SignalR.Transports.WebSocketTransport Error: 0 : OnError(7bdc2904-8f12-4324-898f-58e4a9f4e686, System.Net.WebSockets.WebSocketException (0x800703E3): The I/O operation has been aborted because of either a thread exit or an application request 
    at System.Web.WebSockets.WebSocketPipe.<>c__DisplayClass9_0.<ReadFragmentAsync>b__0(Int32 hrError, Int32 cbIO, Boolean fUtf8Encoded, Boolean fFinalFragment, Boolean fClose) 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at System.Web.WebSockets.AspNetWebSocket.<DoWork>d__45`1.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at System.Web.WebSockets.AspNetWebSocket.<>c__DisplayClass36_0.<<ReceiveAsyncImpl>b__0>d.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Microsoft.AspNet.SignalR.WebSockets.WebSocketMessageReader.<ReadMessageAsync>d__3.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Microsoft.AspNet.SignalR.WebSockets.WebSocketHandler.<ProcessWebSocketRequestAsync>d__25.MoveNext())

和WebSocket的错误：

SCRIPT12030: WebSocket Error: Network Error 12030, The connection with the server was terminated abnormally 
[time] SignalR: Unclean disconnect from websocket: 
[time] SignalR: Closing the Websocket.

当我检查jQuery.signalr-2.2。 1.js，onclose事件引发，错误代码为。

我还在SignalR website上提出了一个问题。如果您能以任何方式找出发生这种情况的原因，我将不胜感激。

更多信息：

它发生在Internet Explorer以及谷歌浏览器，因为我测试。
2015年，我在Visual Studio 上使用SignalR 2.2.1和.NET Framework 4.5.2，但我也尝试了不同的SignalR版本（2.0.2）。

来源

2017-04-02 Babak

我终于找到了如何解决这个问题。我试图让在Bin文件夹这里的变化：

string directory = Server.MapPath("~/bin/") + @"\"; 

string source = directory + @"Templates\Template.xlsx"; 
string destination = directory + @"Spreadsheets\output file.xlsx"; 
System.IO.File.Copy(source, destination, true);

是导致IIS回收应用领域，因此，SignalR连接复位，并抛出一个WebSocketException。因此，将第一行更改为：

string directory = Server.MapPath("~/") + @"\";

解决了我的问题。

来源

2017-04-03 04:53:30 Babak

获取WebSocket错误：使用File.Copy与SignalR时出现网络错误12030

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