c# - SignalR:客户端断开连接

Question

SignalR 如何处理客户端断开连接？如果我陈述以下内容是否正确？

• SignalR 将通过 Javascript 事件处理检测浏览器页面关闭/刷新，并将适当的数据包发送到服务器(通过持久连接)；
• SignalR 不会检测浏览器关闭/网络故障(可能仅通过超时)。

我的目标是长轮询传输。

我知道 this question但我想说清楚一点。

Answer 1

如果用户刷新页面，则视为新连接。您是正确的，断开连接是基于超时。

<罢工>

您可以通过实现 SignalR.Hubs.IConnected 来处理集线器中的连接/重新连接和断开连接事件。和 SignalR.Hubs.IDisconnect .

以上指的是 SignalR 0.5.x。

来自 the official documentation (目前为 v1.1.3):

public class ContosoChatHub : Hub
{
    public override Task OnConnected()
    {
        // Add your own code here.
        // For example: in a chat application, record the association between
        // the current connection ID and user name, and mark the user as online.
        // After the code in this method completes, the client is informed that
        // the connection is established; for example, in a JavaScript client,
        // the start().done callback is executed.
        return base.OnConnected();
    }

    public override Task OnDisconnected()
    {
        // Add your own code here.
        // For example: in a chat application, mark the user as offline, 
        // delete the association between the current connection id and user name.
        return base.OnDisconnected();
    }

    public override Task OnReconnected()
    {
        // Add your own code here.
        // For example: in a chat application, you might have marked the
        // user as offline after a period of inactivity; in that case 
        // mark the user as online again.
        return base.OnReconnected();
    }
}