我想用 .NET 客户端实现一个 pub/sub 应用程序,所以我正在通过这个最少的代码测试 SignalR。
这是服务器:
namespace Test.SignalRComm.SimpleServer
{
using System.Threading.Tasks;
using log4net;
using SignalR;
using SignalR.Hosting.Self;
using SignalR.Hubs;
using SignalR.Infrastructure;
class Program
{
private static SignalRServer signalRServer = null;
static void Main(string[] args)
{
signalRServer = new SignalRServer();
signalRServer.Start();
System.Console.WriteLine("Press Enter to close...");
System.Console.ReadLine();
signalRServer.Stop();
}
}
public class SignalRServer
{
private string serverUrl = null;
public Server signalRServer = null;
public SignalRServer()
{
serverUrl = @"http://localhost:5001/";
signalRServer = new SignalR.Hosting.Self.Server(serverUrl);
signalRServer.EnableHubs();
}
public void Start()
{
signalRServer.Start();
}
public void Stop()
{
IConnectionManager connManager = signalRServer.DependencyResolver.Resolve<IConnectionManager>();
dynamic clients = connManager.GetClients<SignalRTestHub>();
clients.AddMessage("Test");
signalRServer.Stop();
}
}
public class SignalRTestHub : Hub, IDisconnect
{
private static readonly ILog logger = LogManager.GetLogger(typeof(SignalRTestHub));
public void Register(string token)
{
AddToGroup(token).ContinueWith(task =>
{
if (task.IsFaulted)
logger.Error(task.Exception.GetBaseException());
else
{
string message = string.Format("Client {0} registered with token <{1}>", Context.ConnectionId, token);
logger.Info(message);
}
});
}
public void Unregister(string token)
{
RemoveFromGroup(token).ContinueWith(task =>
{
if (task.IsFaulted)
logger.Error(task.Exception.GetBaseException());
else
logger.InfoFormat("Client {0} unregistered from token <{1}>", Context.ConnectionId, token);
});
}
public Task Disconnect()
{
string message = string.Format("Client {0} disconnected", Context.ConnectionId);
logger.Info(message);
return null;
}
}
}
这是客户:
namespace Test.SignalRComm.SimpleClient
{
using System.Threading.Tasks;
using log4net;
using SignalR.Client.Hubs;
class Program
{
private static readonly ILog logger = LogManager.GetLogger(typeof(Program));
static void Main(string[] args)
{
SignalRClient client = new SignalRClient("http://localhost:5001/");
client.Start().ContinueWith(task =>
{
if (task.IsFaulted)
{
logger.Error("Failed to start!", task.Exception.GetBaseException());
}
else
{
logger.InfoFormat("Success! Connected with client connection id {0}", client.ConnectionId);
// Do more stuff here
client.Invoke("Register", "Test").ContinueWith(tsk =>
{
if (tsk.IsFaulted)
logger.Error("Failed to start!", tsk.Exception.GetBaseException());
else
logger.Info("Success! Registered!");
});
}
});
System.Console.WriteLine("Press Enter to close...");
System.Console.ReadLine();
client.Invoke("Unregister", "Test").ContinueWith(tsk =>
{
if (tsk.IsFaulted)
logger.Error("Failed to stop!", tsk.Exception.GetBaseException());
else
logger.InfoFormat("Success! Unregistered!");
});
client.Stop();
}
}
public class SignalRClient : HubConnection
{
private static readonly ILog logger = LogManager.GetLogger(typeof(SignalRClient));
IHubProxy hub = null;
public SignalRClient(string url)
: base(url)
{
hub = CreateProxy("Test.SignalRComm.SimpleServer.SignalRTestHub");
}
public Task Invoke(string methodName, params object[] args)
{
return hub.Invoke(methodName, args);
}
public void AddMessage(string data)
{
logger.InfoFormat("Received {0}!", data);
}
}
}
虽然从客户端(Register
和Unregister
)调用集线器方法工作正常,但我无法AddMessage
从集线器调用客户端方法。此外,Disconnect
当客户端关闭时,永远不会调用集线器的方法。
我做错了什么?我找不到任何工作示例。
编辑
在客户端订阅 hubs 事件,如下所示:
hub.On<string>("Notify", message => Console.Writeline("Server sent message {0}", message);
并像这样在集线器上触发事件:
Clients.Notify("Something to notify");
使从服务器到客户端的通知正常工作。
我仍然无法检测到客户端断开连接。我IDisconnect
在集线器上实现了接口,但是当客户端连接停止时,Disconnect
集线器上的方法不会被触发。
谢谢你的帮助。