public async Task MqttWebSocketClientAndServerScenario()
{
var websocket = new ClientWebSocket();
websocket.Options.AddSubProtocol(WebSocketConstants.SubProtocols.Mqtt);
Uri uri = new Uri("ws://" + IotHubName + ":" + Port + WebSocketConstants.UriSuffix);
await websocket.ConnectAsync(uri, CancellationToken.None);
var clientReadListener = new ReadListeningHandler();
var clientChannel = new ClientWebSocketChannel(null, websocket);
clientChannel
.Option(ChannelOption.Allocator, UnpooledByteBufferAllocator.Default)
.Option(ChannelOption.AutoRead, true)
.Option(ChannelOption.RcvbufAllocator, new AdaptiveRecvByteBufAllocator())
.Option(ChannelOption.MessageSizeEstimator, DefaultMessageSizeEstimator.Default);
clientChannel.Pipeline.AddLast(
MqttEncoder.Instance,
new MqttDecoder(false, 256 * 1024),
clientReadListener);
var clientWorkerGroup = new MultithreadEventLoopGroup();
await clientWorkerGroup.GetNext().RegisterAsync(clientChannel);
await Task.WhenAll(RunMqttClientScenarioAsync(clientChannel, clientReadListener), RunMqttServerScenarioAsync(serverWebSocketChannel, serverListener));
done = true;
}
private async Task <RegistrationOperationStatus> ProvisionOverWssCommonAsync(
ProvisioningTransportRegisterMessage message,
X509Certificate2 clientCertificate,
CancellationToken cancellationToken)
{
var tcs = new TaskCompletionSource <RegistrationOperationStatus>();
var uriBuilder = new UriBuilder(WsScheme, message.GlobalDeviceEndpoint, Port);
Uri websocketUri = uriBuilder.Uri;
using var websocket = new ClientWebSocket();
websocket.Options.AddSubProtocol(WsMqttSubprotocol);
if (clientCertificate != null)
{
websocket.Options.ClientCertificates.Add(clientCertificate);
}
//Check if we're configured to use a proxy server
try
{
if (Proxy != DefaultWebProxySettings.Instance)
{
// Configure proxy server
websocket.Options.Proxy = Proxy;
if (Logging.IsEnabled)
{
Logging.Info(this, $"{nameof(ProvisionOverWssUsingX509CertificateAsync)} Setting ClientWebSocket.Options.Proxy: {Proxy}");
}
}
}
catch (PlatformNotSupportedException)
{
// .NET Core 2.0 doesn't support WebProxy configuration - ignore this setting.
if (Logging.IsEnabled)
{
Logging.Error(this, $"{nameof(ProvisionOverWssUsingX509CertificateAsync)} PlatformNotSupportedException thrown as .NET Core 2.0 doesn't support proxy");
}
}
await websocket.ConnectAsync(websocketUri, cancellationToken).ConfigureAwait(false);
var clientChannel = new ClientWebSocketChannel(null, websocket);
clientChannel
.Option(ChannelOption.Allocator, UnpooledByteBufferAllocator.Default)
.Option(ChannelOption.AutoRead, true)
.Option(ChannelOption.RcvbufAllocator, new AdaptiveRecvByteBufAllocator())
.Option(ChannelOption.MessageSizeEstimator, DefaultMessageSizeEstimator.Default)
.Pipeline.AddLast(
new ReadTimeoutHandler(ReadTimeoutSeconds),
MqttEncoder.Instance,
new MqttDecoder(false, MaxMessageSize),
new LoggingHandler(LogLevel.DEBUG),
new ProvisioningChannelHandlerAdapter(message, tcs, cancellationToken));
await s_eventLoopGroup.RegisterAsync(clientChannel).ConfigureAwait(false);
return(await tcs.Task.ConfigureAwait(false));
}
private async Task <RegistrationOperationStatus> ProvisionOverWssUsingX509CertificateAsync(
ProvisioningTransportRegisterMessage message,
CancellationToken cancellationToken)
{
Debug.Assert(message.Security is SecurityProviderX509);
cancellationToken.ThrowIfCancellationRequested();
X509Certificate2 clientCertificate =
((SecurityProviderX509)message.Security).GetAuthenticationCertificate();
var tcs = new TaskCompletionSource <RegistrationOperationStatus>();
UriBuilder uriBuilder = new UriBuilder(WsScheme, message.GlobalDeviceEndpoint, Port);
Uri websocketUri = uriBuilder.Uri;
// TODO properly dispose of the ws.
var websocket = new ClientWebSocket();
websocket.Options.AddSubProtocol(WsMqttSubprotocol);
websocket.Options.ClientCertificates.Add(clientCertificate);
await websocket.ConnectAsync(websocketUri, cancellationToken).ConfigureAwait(false);
// TODO: use ClientWebSocketChannel.
var clientChannel = new ClientWebSocketChannel(null, websocket);
clientChannel
.Option(ChannelOption.Allocator, UnpooledByteBufferAllocator.Default)
.Option(ChannelOption.AutoRead, true)
.Option(ChannelOption.RcvbufAllocator, new AdaptiveRecvByteBufAllocator())
.Option(ChannelOption.MessageSizeEstimator, DefaultMessageSizeEstimator.Default)
.Pipeline.AddLast(
new ReadTimeoutHandler(ReadTimeoutSeconds),
MqttEncoder.Instance,
new MqttDecoder(false, MaxMessageSize),
new ProvisioningChannelHandlerAdapter(message, tcs, cancellationToken));
await s_eventLoopGroup.RegisterAsync(clientChannel).ConfigureAwait(false);
return(await tcs.Task.ConfigureAwait(false));
}
public async Task ClientWebSocketChannelReadAfterCloseTest()
{
var websocket = new ClientWebSocket();
websocket.Options.AddSubProtocol(WebSocketConstants.SubProtocols.Mqtt);
var uri = new Uri("ws://" + IotHubName + ":" + Port + WebSocketConstants.UriSuffix);
await websocket.ConnectAsync(uri, CancellationToken.None);
var clientReadListener = new ReadListeningHandler();
var clientChannel = new ClientWebSocketChannel(null, websocket);
clientChannel
.Option(ChannelOption.Allocator, UnpooledByteBufferAllocator.Default)
.Option(ChannelOption.AutoRead, true)
.Option(ChannelOption.RcvbufAllocator, new AdaptiveRecvByteBufAllocator())
.Option(ChannelOption.MessageSizeEstimator, DefaultMessageSizeEstimator.Default);
clientChannel.Pipeline.AddLast(
clientReadListener);
var threadLoop = new SingleThreadEventLoop("MQTTExecutionThread", TimeSpan.FromSeconds(1));
await threadLoop.RegisterAsync(clientChannel);
await clientChannel.CloseAsync();
// Test Read API
try
{
await clientReadListener.ReceiveAsync(DefaultTimeout);
Assert.Fail("Should have thrown InvalidOperationException");
}
catch (InvalidOperationException e)
{
Assert.IsTrue(e.Message.Contains("Channel is closed"));
}
done = true;
}
public async Task ClientWebSocketChannelReadAfterCloseTest()
{
var websocket = new ClientWebSocket();
websocket.Options.AddSubProtocol(WebSocketConstants.SubProtocols.Mqtt);
var uri = new Uri("ws://" + IotHubName + ":" + Port + WebSocketConstants.UriSuffix);
await websocket.ConnectAsync(uri, CancellationToken.None);
var clientReadListener = new ReadListeningHandler();
var clientChannel = new ClientWebSocketChannel(null, websocket);
clientChannel
.Option(ChannelOption.Allocator, UnpooledByteBufferAllocator.Default)
.Option(ChannelOption.AutoRead, true)
.Option(ChannelOption.RcvbufAllocator, new AdaptiveRecvByteBufAllocator())
.Option(ChannelOption.MessageSizeEstimator, DefaultMessageSizeEstimator.Default);
clientChannel.Pipeline.AddLast(
clientReadListener);
var threadLoop = new SingleThreadEventLoop("MQTTExecutionThread", TimeSpan.FromSeconds(1));
await threadLoop.RegisterAsync(clientChannel);
await clientChannel.CloseAsync();
// Test Read API
try
{
await clientReadListener.ReceiveAsync(DefaultTimeout);
Assert.Fail("Should have thrown InvalidOperationException");
}
catch (InvalidOperationException e)
{
Assert.IsTrue(e.Message.Contains("Channel is closed"));
}
done = true;
}
public async Task MqttWebSocketClientAndServerScenario()
{
var websocket = new ClientWebSocket();
websocket.Options.AddSubProtocol(WebSocketConstants.SubProtocols.Mqtt);
Uri uri = new Uri("ws://" + IotHubName + ":" + Port + WebSocketConstants.UriSuffix);
await websocket.ConnectAsync(uri, CancellationToken.None);
var clientReadListener = new ReadListeningHandler();
var clientChannel = new ClientWebSocketChannel(null, websocket);
clientChannel
.Option(ChannelOption.Allocator, UnpooledByteBufferAllocator.Default)
.Option(ChannelOption.AutoRead, true)
.Option(ChannelOption.RcvbufAllocator, new AdaptiveRecvByteBufAllocator())
.Option(ChannelOption.MessageSizeEstimator, DefaultMessageSizeEstimator.Default);
clientChannel.Pipeline.AddLast(
MqttEncoder.Instance,
new MqttDecoder(false, 256 * 1024),
clientReadListener);
var clientWorkerGroup = new MultithreadEventLoopGroup();
await clientWorkerGroup.GetNext().RegisterAsync(clientChannel);
await Task.WhenAll(RunMqttClientScenarioAsync(clientChannel, clientReadListener), RunMqttServerScenarioAsync(serverWebSocketChannel, serverListener));
done = true;
}
Func<IPAddress, int, Task<IChannel>> CreateWebSocketChannelFactory(IotHubConnectionString iotHubConnectionString, MqttTransportSettings settings)
{
return async (address, port) =>
{
IEventLoopGroup eventLoopGroup = EventLoopGroupPool.TakeOrAdd(this.eventLoopGroupKey);
var websocketUri = new Uri(WebSocketConstants.Scheme + iotHubConnectionString.HostName + ":" + WebSocketConstants.SecurePort + WebSocketConstants.UriSuffix);
var websocket = new ClientWebSocket();
websocket.Options.AddSubProtocol(WebSocketConstants.SubProtocols.Mqtt);
// Check if we're configured to use a proxy server
IWebProxy webProxy = WebRequest.DefaultWebProxy;
Uri proxyAddress = webProxy?.GetProxy(websocketUri);
if (!websocketUri.Equals(proxyAddress))
{
// Configure proxy server
websocket.Options.Proxy = webProxy;
}
if (settings.ClientCertificate != null)
{
websocket.Options.ClientCertificates.Add(settings.ClientCertificate);
}
else
{
websocket.Options.UseDefaultCredentials = true;
}
using (var cancellationTokenSource = new CancellationTokenSource(TimeSpan.FromMinutes(1)))
{
await websocket.ConnectAsync(websocketUri, cancellationTokenSource.Token);
}
var clientChannel = new ClientWebSocketChannel(null, websocket);
clientChannel
.Option(ChannelOption.Allocator, UnpooledByteBufferAllocator.Default)
.Option(ChannelOption.AutoRead, false)
.Option(ChannelOption.RcvbufAllocator, new AdaptiveRecvByteBufAllocator())
.Option(ChannelOption.MessageSizeEstimator, DefaultMessageSizeEstimator.Default)
.Pipeline.AddLast(
MqttEncoder.Instance,
new MqttDecoder(false, MaxMessageSize),
this.mqttIotHubAdapterFactory.Create(this.OnConnected, this.OnMessageReceived, this.OnError, iotHubConnectionString, settings));
await eventLoopGroup.GetNext().RegisterAsync(clientChannel);
this.ScheduleCleanup(() =>
{
EventLoopGroupPool.Release(this.eventLoopGroupKey);
return TaskConstants.Completed;
});
return clientChannel;
};
}