Question

我需要建立多个Web套接字连接，这些连接将永远接收更新，除非它们在某些情况下退出。我需要等待这些套接字连接，因为这个轮询更新事件的循环限制了可以一次运行的线程数，从而限制了我可以打开的连接数。

我试图通过使用信号量作为检测事件的方法来解决这个问题（通过IObserver接口观察事件）

static SemaphoreSlim send = new SemaphoreSlim(0,1);
static object newUpdate;
static numberOfClients = 0;

以及轮询和可能接收更新或终止的循环

while(true)
{
   await send.WaitAsync() //wait the thread so others can start 
   //do some things with the updated valu and send data or possibly quit
}

以及检测事件的OnNext实现

public void OnNext(object value)
{
   newUpdate = value;
   for (int i = 0; i < numberOfClients; i++)
   {
      send.Release();
      Thread.Sleep(100);
   }
}

和客户端实现：

    do
    {
        try
        {
           WebSocketReceiveResult result = await websocket.ReceiveAsync(buffer, CancellationToken.None);

            byte[] receivedData = new byte[result.Count];
            Buffer.BlockCopy(buffer.Array, 0, receivedData, 0, result.Count);
            if (result.MessageType == WebSocketMessageType.Text)
            {
                    Console.WriteLine("\nReceived message: " + Encoding.UTF8.GetString(receivedData));
            }
        }
        catch (WebSocketException e)
        {
            if (websocket.State == WebSocketState.Aborted)
            {
                break;
            }
            continue;
    }

        if (result.EndOfMessage)
        {
           break;
        }
    }
    while (websocket.State == WebSocketState.Open);

当我执行此操作时，似乎是行：

await send.WaitAsync()

在尝试调用await时，会立即使客户端代码崩溃.ReceiveAsync（）并发出声响：

 "Unable to read data from transport connection. An existing connection was forcibly closed by the remote host".

我有什么想法可以完成这样的事情？这是使用OWIN WebSocket扩展。

等待导致Web套接字连接关闭

0 个答案: