任何人都可以解释我如何从客户端删除websockets意外终止其连接?我的意思是用户以不好的方式关闭应用程序,而不告诉服务器他们想要断开连接?你通常如何处理断开连接。
我尝试了一段侦听消息接收的代码,并且有一个带有3s的cancellationTokenSource,因此它将检查连接是否仍然存在。当我关闭websocket客户端应用程序时,服务器不会转到WebSocketState.Closed部分,并且当触发取消令牌时,服务器会断开我与客户端的连接。我在这里做错了什么?!提前致谢!
while (socket.State == WebSocketState.Open)
{
var cancellationSource = new CancellationTokenSource(TimeSpan.FromMilliseconds(3000));
buffer = new ArraySegment<byte>(new byte[4096]);
WebSocketReceiveResult received = null;
try
{
received = await socket.ReceiveAsync(buffer, cancellationSource);
}
catch (AggregateException e)
{
continue;
}
switch (received.MessageType)
{
case WebSocketMessageType.Close:
HandleClose(socket);
break;
case WebSocketMessageType.Text:
// Handle text message
break;
}
}
if (socket.State == WebSocketState.Aborted)
{
// Handle aborted
}
else if (socket.State == WebSocketState.Closed)
{
HandleClose(socket);
}
else if (socket.State == WebSocketState.CloseReceived)
{
}
else if (socket.State == WebSocketState.CloseSent)
{
}
如果客户端意外关闭连接,ReceiveAsync
将抛出WebSocketException
。
try
{
var received = await webSocketConnection.ReceiveAsync(...);
}
catch(WebSocketException webSocketException)
{
if(webSocketException.WebSocketErrorCode == WebSocketError.ConnectionClosedPrematurely)
{
//custom logic
}
}