SignalR：客户端断开连接

SignalR如何处理客户端断开连接？ 如果我陈述以下内容，我是对的吗？

• SignalR将通过Javascript事件处理检测浏览器页面关闭/刷新，并将相应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（可能只是超时）。

我的目标是长轮询运输。

我知道这个问题但想对我说清楚一点。

Answer 1

如果用户刷新页面，则将其视为新连接。 你是正确的断开连接是基于超时。

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

以上简称SignalR 0.5.x.

从官方文档 （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(); } } 

Answer 2

在SignalR 1.0中，不再实现SignalR.Hubs.IConnected和SignalR.Hubs.IDisconnect，现在它只是对集线器本身的覆盖：

 public class Chat : Hub { public override Task OnConnected() { return base.OnConnected(); } public override Task OnDisconnected() { return base.OnDisconnected(); } public override Task OnReconnected() { return base.OnReconnected(); } }