private static Task Do()
{
string url = "http://192.168.70.118:1980";
var connection = new HubConnection(url);
IHubProxy hub = connection.CreateHubProxy("echo");
var httpClient = new DefaultHttpClient();
var transport = new AutoTransport(
httpClient,
new IClientTransport[]
{
//new ServerSentEventsTransport(httpClient),
new LongPollingTransport(httpClient)
}
);
//connection.Error +=
// error => ConsoleColor.Red.AsColorFor(() => Console.WriteLine("Error from connection: {0}", error));
connection.Closed += () =>
{
Console.WriteLine("Closed");
//if (!connection.EnsureReconnecting())
//{
// Task.Delay(TimeSpan.FromSeconds(30)).ContinueWith(t => connection.Start().Wait());
//}
if (!connection.EnsureReconnecting())
{
Task.Factory.StartNew(() => Thread.Sleep(TimeSpan.FromSeconds(30)))
.ContinueWith(t => connection.Start().Wait());
}
};
connection.ConnectionSlow += () => Console.WriteLine("ConnectionSolw!");
connection.Received += data => Console.WriteLine(string.Format("Received:{0}", data));
connection.Reconnected += () => Console.WriteLine("Reconnected!");
connection.StateChanged +=
state =>
Console.WriteLine("StateChanged:From {0} to {1}", state.OldState, state.NewState);
return connection.Start(transport).ContinueWith(_ =>
{
Console.WriteLine("Connected, transport is :{0}", connection.Transport.Name);
return hub;
});
}
public async Task NegotiateInvokesGetNegotiationResponseOnTransportHelperAsync()
{
const string transportName = "fakeTransport";
var connection = new Connection("http://fake.url/");
var client = new DefaultHttpClient();
var negotiationResponse = new NegotiationResponse();
var mockTransportHelper = new Mock<TransportHelper>();
mockTransportHelper.Setup(
h => h.GetNegotiationResponse(It.IsAny<IHttpClient>(), It.IsAny<IConnection>(), It.IsAny<string>()))
.Returns(Task.FromResult(negotiationResponse));
var transport =
new Mock<ClientTransportBase>(client, transportName, mockTransportHelper.Object,
new TransportAbortHandler(client, transportName))
{
CallBase = true
}.Object;
Assert.Same(negotiationResponse, await transport.Negotiate(connection, "test"));
mockTransportHelper.Verify(m => m.GetNegotiationResponse(client, connection, "test"), Times.Once());
}
private static IClientTransport GetTransport(string transport)
{
if (!String.IsNullOrEmpty(transport))
{
var httpClient = new DefaultHttpClient();
if (transport.Equals("WebSockets", StringComparison.InvariantCultureIgnoreCase))
{
return new WebSocketTransport(httpClient);
}
else if (transport.Equals("ServerSentEvents", StringComparison.InvariantCultureIgnoreCase))
{
return new ServerSentEventsTransport(httpClient);
}
else if (transport.Equals("LongPolling", StringComparison.InvariantCultureIgnoreCase))
{
return new LongPollingTransport(httpClient);
}
else if (transport.Equals("Auto", StringComparison.InvariantCultureIgnoreCase))
{
return new AutoTransport(httpClient);
}
}
return null;
}
public async Task FallbackToLongPollingIIS()
{
using (ITestHost host = CreateHost(HostType.IISExpress))
{
// Reduce transportConnectionTimeout to 5 seconds
host.Initialize(transportConnectTimeout: 5);
var connection = CreateConnection(host, "/fall-back");
using (connection)
{
var tcs = new TaskCompletionSource<object>();
connection.StateChanged += change =>
{
if (change.NewState == ConnectionState.Reconnecting)
{
tcs.TrySetException(new Exception("The connection should not be reconnecting"));
}
};
var client = new DefaultHttpClient();
var transports = new IClientTransport[] {
new ServerSentEventsTransport(client),
new LongPollingTransport(client)
};
var transport = new AutoTransport(client, transports);
await connection.Start(transport);
Assert.Equal(connection.Transport.Name, "longPolling");
Assert.False(tcs.Task.Wait(TimeSpan.FromSeconds(5)));
}
}
}
private IClientTransport CreateTranport(string transportName)
{
TransportType transportType;
if (!Enum.TryParse<TransportType>(transportName, true, out transportType))
{
// default it to Long Polling for transport
transportType = TransportType.ServerSentEvents;
}
var client = new DefaultHttpClient();
switch (transportType)
{
case TransportType.Websockets:
return new WebSocketTransport(client);
case TransportType.ServerSentEvents:
return new ServerSentEventsTransport(client);
case TransportType.ForeverFrame:
break;
case TransportType.LongPolling:
return new LongPollingTransport(client);
default:
return new AutoTransport(client);
}
throw new NotSupportedException("Transport not supported");
}
public void FallbackToLongPollingIIS()
{
using (ITestHost host = new IISExpressTestHost())
{
host.Initialize();
var connection = CreateConnection(host.Url + "/fall-back");
var tcs = new TaskCompletionSource<object>();
connection.StateChanged += change =>
{
if (change.NewState == ConnectionState.Reconnecting)
{
tcs.TrySetException(new Exception("The connection should not be reconnecting"));
}
};
var client = new DefaultHttpClient();
var transports = new IClientTransport[] {
new ServerSentEventsTransport(client) { ConnectionTimeout = TimeSpan.Zero },
new LongPollingTransport(client)
};
var transport = new AutoTransport(client, transports);
connection.Start(transport).Wait();
Assert.Equal(connection.Transport.Name, "longPolling");
Assert.False(tcs.Task.Wait(TimeSpan.FromSeconds(5)));
connection.Stop();
}
}
