public async Task RunSampleAsync(bool acceptDeviceStreamingRequest, CancellationTokenSource cancellationTokenSource)
{
try
{
Update("Awaiting connection.");
DeviceStreamRequest streamRequest = await _deviceClient.WaitForDeviceStreamRequestAsync(cancellationTokenSource.Token).ConfigureAwait(false);
Update("Got request.");
if (streamRequest != null)
{
if (acceptDeviceStreamingRequest)
{
try
{
await _deviceClient.AcceptDeviceStreamRequestAsync(streamRequest, cancellationTokenSource.Token).ConfigureAwait(false);
Update("Accepted request.");
using (ClientWebSocket webSocket = await DeviceStreamingCommon.GetStreamingClientAsync(streamRequest.Url, streamRequest.AuthorizationToken, cancellationTokenSource.Token).ConfigureAwait(false))
{
Update("Got client stream.");
using (TcpClient tcpClient = new TcpClient())
{
Update("Connecting to stream.");
await tcpClient.ConnectAsync(_host, _port).ConfigureAwait(false);
using (NetworkStream localStream = tcpClient.GetStream())
{
Update("Device starting streaming");
counter = 0;
await Task.WhenAny(
HandleIncomingDataAsync(localStream, webSocket, cancellationTokenSource.Token),
HandleOutgoingDataAsync(localStream, webSocket, cancellationTokenSource.Token)).ConfigureAwait(false);
Update("Closing stream");
localStream.Close();
Update("Closed stream");
}
}
await webSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, String.Empty, cancellationTokenSource.Token).ConfigureAwait(false);
}
}
catch (Exception ex)
{
Update("Device got an inner exception. Exiting connection."); //: {0}", ex);
}
}
else
{
await _deviceClient.RejectDeviceStreamRequestAsync(streamRequest, cancellationTokenSource.Token).ConfigureAwait(false);
}
}
}
catch (Exception ex)
{
ErrorMsg("Device got an outer exception", ex);
}
}
private static async void HandleIncomingConnectionsAndCreateStreams(string deviceId, ServiceClient serviceClient, TcpClient tcpClient)
{
DeviceStreamRequest deviceStreamRequest = new DeviceStreamRequest(
streamName: "ProxyStreamFromSvc"
);
using (var localStream = tcpClient.GetStream())
{
Update("Awaiting connection");
using (cancellationTokenSourceOuter = new CancellationTokenSource())
{
DeviceStreamResponse result = await serviceClient.CreateStreamAsync(deviceId, deviceStreamRequest, cancellationTokenSourceOuter.Token).ConfigureAwait(false);
Update($"Stream response received: Name={deviceStreamRequest.StreamName} IsAccepted={result.IsAccepted}");
if (result.IsAccepted)
{
try
{
using (cancellationTokenSource = new CancellationTokenSource())
using (ClientWebSocket remoteStream = await DeviceStreamingCommon.GetStreamingClientAsync(result.Url, result.AuthorizationToken, cancellationTokenSource.Token).ConfigureAwait(false))
{
Update("Starting streaming");
counter = 0;
await Task.WhenAny(
HandleIncomingDataAsync(localStream, remoteStream, cancellationTokenSource.Token),
HandleOutgoingDataAsync(localStream, remoteStream, cancellationTokenSource.Token)).ConfigureAwait(false);
}
Update("Done streaming");
}
catch (Exception ex)
{
ErrorMsg("Service got an exception: {0}", ex);
}
}
}
}
tcpClient.Close();
}
private async Task RunSvcAsync()
{
string errorMsg = "";
string updateMsg = "";
using (cancellationTokenSourceManual = new CancellationTokenSource())
{
ClientWebSocket stream = null;
try
{
DeviceStreamRequest deviceStreamRequest = new DeviceStreamRequest(
streamName: "TestStream"
);
updateMsg = "Starting Svc TestStream";
UpdateStatus(updateMsg);
cancellationTokenSourceManual.Token.Register(() =>
{
_serviceClient?.CloseAsync();
_serviceClient?.Dispose();
});
DeviceStreamResponse result = await _serviceClient.CreateStreamAsync(_deviceId, deviceStreamRequest).ConfigureAwait(false);
updateMsg = string.Format("Svc Stream response received: Name={0} IsAccepted={1}", deviceStreamRequest.StreamName, result.IsAccepted);
UpdateStatus(updateMsg);
if (result.IsAccepted)
{
using (cancellationTokenSourceTimeout = new CancellationTokenSource(DeviceStreamingCommon.DeviceTimeout))
{
try
{
using (stream = await DeviceStreamingCommon.GetStreamingClientAsync(result.Url, result.AuthorizationToken, cancellationTokenSourceTimeout.Token).ConfigureAwait(false))
{
updateMsg = "Stream is open.";
UpdateStatus(updateMsg);
bool keepAlive = false;
MsgOutWaitHandle = new AutoResetEvent(true);
do
{
//Nb: Not waited on first entry as waiting for msgOut, which we already have.
updateMsg = "Stream is open. Waiting for msg to send.";
UpdateStatus(updateMsg);
MsgOutWaitHandle.WaitOne();
updateMsg = "Sending msg.";
UpdateStatus(updateMsg);
bool caught = false;
try
{
MsgOut = SvcCurrentSettings.ProcessMsgOut(MsgOut, SvcCurrentSettings.KeepAlive, SvcCurrentSettings.ResponseExpected, DevKeepListening , DevAutoStart );
} catch (NotImplementedException )
{
errorMsg += "DeviceCurrentSettings not properly implemented";
keepAlive = false;
caught = true;
}
if (!caught)
{
await SendMsg(stream, MsgOut, cancellationTokenSourceTimeout);
updateMsg = "Sent msg.";
UpdateStatus(updateMsg);
if (this.SvcCurrentSettings.ResponseExpected)
{
byte[] receiveBuffer = new byte[1024];
System.ArraySegment<byte> ReceiveBuffer = new ArraySegment<byte>(receiveBuffer);
var receiveResult = await stream.ReceiveAsync(ReceiveBuffer, cancellationTokenSourceTimeout.Token).ConfigureAwait(false);
MsgIn = Encoding.UTF8.GetString(receiveBuffer, 0, receiveResult.Count);
string subStrn = Azure_IoTHub_DeviceStreaming.DeviceStreamingCommon.DeviceInSimuatedDeviceModeStrn;
int subStrnLen = subStrn.Length;
string subStrn2 = Azure_IoTHub_Sensors.TelemetryDataPoint.Prefix;
int subStrnLen2 = subStrn2.Length;
if (MsgIn.Length>= subStrnLen)
if (MsgIn.Substring(0,subStrnLen) == subStrn)
{
MsgIn = MsgIn.Substring(subStrnLen);
Azure_IoTHub_Telemetry.SyntheticIoTMessage iotHubMessage = Azure_IoTHub_Telemetry.SyntheticIoTMessage.Deserialize(MsgIn);
Microsoft.Azure.Devices.Client.Message message = iotHubMessage.ToMessage();
Microsoft.Azure.EventHubs.EventData eventData = Azure_IoTHub_Telemetry.SyntheticIoTMessage.ToEventData(message);
MsgIn = Azure_IoTHub_Telemetry.SyntheticIoTMessage.EventData_ToString(eventData);
}
else if (MsgIn.Length >= subStrnLen2)
if (MsgIn.Substring(0, subStrnLen2) == subStrn2)
{
MsgIn = MsgIn.Substring(subStrnLen2);
Azure_IoTHub_Sensors.TelemetryDataPoint telemetry = Azure_IoTHub_Sensors.TelemetryDataPoint.Deserialize(MsgIn);
MsgIn = telemetry.ToString();
//Microsoft.Azure.Devices.Client.Message message = iotHubMessage.ToMessage();
//Microsoft.Azure.EventHubs.EventData eventData = Azure_IoTHub_Telemetry.SyntheticIoTMessage.ToEventData(message);
//MsgIn = Azure_IoTHub_Telemetry.SyntheticIoTMessage.EventData_ToString(eventData);
}
keepAlive = false;
if (SvcCurrentSettings != null)
keepAlive = this.SvcCurrentSettings.KeepAlive;
try
{
if (OnRecvdTextD != null)
OnRecvdTextD(MsgIn);
}
catch (Exception exx)
{
errorMsg += "OnRecvdTextD not properly implemented: " + exx.Message;
keepAlive = false;
}
updateMsg = string.Format("Svc Received stream data: {0}", MsgIn);
UpdateStatus(updateMsg);
}
MsgOutWaitHandle.Reset();
}
} while (keepAlive) ;
MsgOutWaitHandle = null;
updateMsg = "Closing Svc Socket";
UpdateStatus(updateMsg);
await stream.CloseAsync(WebSocketCloseStatus.NormalClosure, String.Empty, cancellationTokenSourceTimeout.Token).ConfigureAwait(false);
stream = null;
}
}
catch (Microsoft.Azure.Devices.Client.Exceptions.IotHubCommunicationException)
{
System.Diagnostics.Debug.WriteLine("1 Error RunSvcAsync(): Hub connection failure");
errorMsg = "Hub connection failure";
}
catch (Microsoft.Azure.Devices.Common.Exceptions.DeviceNotFoundException)
{
System.Diagnostics.Debug.WriteLine("1 Error RunSvcAsync(): Device not found");
errorMsg = "Device not found";
}
catch (TaskCanceledException)
{
System.Diagnostics.Debug.WriteLine("1 Error RunSvcAsync(): Task cancelled");
errorMsg = "Task cancelled";
}
catch (OperationCanceledException)
{
System.Diagnostics.Debug.WriteLine("1 Error RunSvcAsync(): Operation cancelled");
errorMsg = "Operation cancelled";
}
catch (Exception ex)
{
if ((bool)cancellationTokenSourceManual?.IsCancellationRequested)
{
System.Diagnostics.Debug.WriteLine("1 Error RunSvcAsync(): Cancelled.");
errorMsg = "Cancelled";
}
else if ((bool)cancellationTokenSourceTimeout?.IsCancellationRequested)
{
System.Diagnostics.Debug.WriteLine("1 Error RunSvcAsync(): Timed Out.");
errorMsg = "Timed Out";
}
else if (!ex.Message.Contains("Timed out"))
{
System.Diagnostics.Debug.WriteLine("1 Error RunSvcAsync(): " + ex.Message);
errorMsg = ex.Message;
}
else
{
System.Diagnostics.Debug.WriteLine("2 Error RunSvcAsync(): Timed out");
errorMsg = "Timed Out";
}
}
}
}
}
catch (Microsoft.Azure.Devices.Client.Exceptions.IotHubCommunicationException)
{
System.Diagnostics.Debug.WriteLine("2 Error RunSvcAsync(): Hub connection failure");
errorMsg += " Hub connection failure";
}
catch (Microsoft.Azure.Devices.Common.Exceptions.DeviceNotFoundException)
{
System.Diagnostics.Debug.WriteLine("2 Error RunSvcAsync(): Device not found");
errorMsg += " Device not found";
}
catch (TaskCanceledException)
{
System.Diagnostics.Debug.WriteLine("2 Error RunSvcAsync(): Task cancelled");
errorMsg += " Task cancelled";
}
catch (OperationCanceledException)
{
System.Diagnostics.Debug.WriteLine("2 Error RunSvcAsync(): Operation cancelled");
errorMsg += " Operation cancelled";
}
catch (Exception ex)
{ if ((bool)cancellationTokenSourceManual?.IsCancellationRequested)
{
System.Diagnostics.Debug.WriteLine("2 Error RunSvcAsync(): Cancelled.");
errorMsg += " Cancelled";
}
else if ((bool)cancellationTokenSourceTimeout?.IsCancellationRequested)
{
System.Diagnostics.Debug.WriteLine("2 Error RunSvcAsync(): Timed Out.");
errorMsg += " Timed Out";
}
else if (!ex.Message.Contains("Timed out"))
{
System.Diagnostics.Debug.WriteLine("2 Error RunSvcAsync(): " + ex.Message);
errorMsg += " " + ex.Message;
}
else
{
System.Diagnostics.Debug.WriteLine("2 Error RunSvcAsync(): Timed out");
errorMsg += " Timed Out";
}
};
if (stream != null)
{
if (stream.CloseStatus != WebSocketCloseStatus.NormalClosure)
{
updateMsg= "Aborting Svc Socket as is errant or cancelled: " + errorMsg;
UpdateStatus(updateMsg);
stream.Abort();
updateMsg = "Aborted Svc Socket as was errant or cancelled:" + errorMsg;
UpdateStatus(updateMsg);
}
else
{
updateMsg = "Socket closed normally: " + errorMsg;
UpdateStatus(updateMsg);
}
stream = null;
}
else
{
updateMsg = "Socket closed Normally: " + errorMsg;
UpdateStatus(updateMsg);
}
deviceStream_Svc = null;
MsgOutWaitHandle = null;
cancellationTokenSourceTimeout = null;
}
}
/// <summary>
/// The actual Device Streaming method at Device end of the pipe
/// </summary>
/// <param name="acceptDeviceStreamingRequest"></param>
/// <returns></returns>
private async Task RunDeviceAsync(bool acceptDeviceStreamingRequest)
{
isManualCancel = false;
string errorMsg = "";
string updateMsg = "";
byte[] buffer = new byte[1024];
ClientWebSocket webSocket = null;
byte[] sendBuffer;
try
{
using (cancellationTokenSourceTimeout = new CancellationTokenSource(DeviceStreamingCommon.DeviceTimeout))
{
try
{
cancellationTokenSourceTimeout.Token.Register(() =>
{
webSocket?.Abort();
webSocket?.Dispose();
});
updateMsg = "Starting Device Stream Request.";
System.Diagnostics.Debug.WriteLine(updateMsg);
UpdateStatus(updateMsg);
Microsoft.Azure.Devices.Client.DeviceStreamRequest streamRequest = await deviceClient.WaitForDeviceStreamRequestAsync(cancellationTokenSourceTimeout.Token).ConfigureAwait(false);
if (streamRequest != null)
{
if (acceptDeviceStreamingRequest)
{
await deviceClient.AcceptDeviceStreamRequestAsync(streamRequest, cancellationTokenSourceTimeout.Token).ConfigureAwait(false);
updateMsg = "Device got a connection.";
UpdateStatus(updateMsg);
using (webSocket = await DeviceStreamingCommon.GetStreamingClientAsync(streamRequest.Url, streamRequest.AuthorizationToken, cancellationTokenSourceTimeout.Token).ConfigureAwait(false))
{
updateMsg = string.Format("Device got stream: Name={0}. Socket open.", streamRequest.Name);
UpdateStatus(updateMsg);
bool keepAlive = false;
do
{
updateMsg = string.Format("Device is connected and listening");
UpdateStatus(updateMsg);
WebSocketReceiveResult receiveResult = await webSocket.ReceiveAsync(new ArraySegment <byte>(buffer, 0, buffer.Length), cancellationTokenSourceTimeout.Token).ConfigureAwait(false);
if (receiveResult.MessageType == WebSocketMessageType.Close)
{
UpdateStatus("Received Close msg");
keepAlive = false;
}
else
{
string MsgIn = Encoding.UTF8.GetString(buffer, 0, receiveResult.Count);
//If the received text is more than one line only use the first line
string[] lines = MsgIn.Split(new char[] { '\r', '\n' });
if (lines.Length > 1)
{
MsgIn = lines[0];
}
updateMsg = string.Format("Device Received stream data: {0}.", MsgIn);
UpdateStatus(updateMsg);
//Get keepAlive and respond flags and strip from msg in
bool respond = true;
try
{
MsgIn = DeviceCurrentSettings.ProcessMsgIn(MsgIn);
respond = DeviceCurrentSettings.ResponseExpected;
keepAlive = DeviceCurrentSettings.KeepAlive;
if (DeviceCurrentSettings.AutoStartDeviceChanged)
{
ActionCmdD?.Invoke(DeviceCurrentSettings.AutoStartDevice, "", 0, 0);
}
if (DeviceCurrentSettings.KeepDeviceListeningChanged)
{
ActionCmdD?.Invoke(DeviceCurrentSettings.KeepDeviceListening, "", 0, 1);
}
}
catch (System.NotImplementedException)
{
errorMsg += "DeviceCurrentSettings not properly Implemented";
keepAlive = false;
respond = false;
}
string msgOut = MsgIn;
Message sendMessage = null;
try
{
if (OnRecvdTextIO != null)
{
msgOut = OnRecvdTextIO(MsgIn, out sendMessage);
}
}
catch (Exception exx)
{
errorMsg += "OnRecvdTextIO not properly Implemented: " + exx.Message;
keepAlive = false;
respond = false;
}
if (respond)
{
//if (sendMessage == null)
//{
sendBuffer = Encoding.UTF8.GetBytes(msgOut);
await webSocket.SendAsync(new ArraySegment <byte>(sendBuffer, 0, sendBuffer.Length), WebSocketMessageType.Binary, true, cancellationTokenSourceTimeout.Token).ConfigureAwait(false);
//}
//else
//{
// sendBuffer = sendMessage.GetBytes();
// var xx = new ArraySegment<byte>(sendBuffer, 0, sendBuffer.Length);
// byte[] longer = xx.Array;
// byte[] shortArray = longer.Take(sendBuffer.Length).ToArray();
// Microsoft.Azure.Devices.Client.Message message = null;
// message = new Microsoft.Azure.Devices.Client.Message(shortArray);
// await webSocket.SendAsync(xx, WebSocketMessageType.Binary, true, cancellationTokenSourceTimeout.Token).ConfigureAwait(false);
//}
updateMsg = string.Format("Device Sent stream data: {0}", Encoding.UTF8.GetString(sendBuffer, 0, sendBuffer.Length));
UpdateStatus(updateMsg);
}
//By default do not loop
}
} while (keepAlive);
updateMsg = "Closing Device Socket Normally.";
UpdateStatus(updateMsg);
await webSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, String.Empty, cancellationTokenSourceTimeout.Token).ConfigureAwait(false);
webSocket = null;
}
}
else
{
await deviceClient.RejectDeviceStreamRequestAsync(streamRequest, cancellationTokenSourceTimeout.Token).ConfigureAwait(false);
}
}
await deviceClient.CloseAsync().ConfigureAwait(false);
}
catch (Microsoft.Azure.Devices.Client.Exceptions.IotHubCommunicationException)
{
if ((bool)cancellationTokenSourceTimeout?.IsCancellationRequested)
{
System.Diagnostics.Debug.WriteLine("1 Error RunSvcAsync(): Timed Out.");
errorMsg += " Timed Out";
}
else
{
System.Diagnostics.Debug.WriteLine("1 Error RunDeviceAsync(): Hub connection failure");
errorMsg = "Hub connection failure";
}
}
catch (Microsoft.Azure.Devices.Common.Exceptions.DeviceNotFoundException)
{
System.Diagnostics.Debug.WriteLine("1 Error RunDeviceAsync(): Device not found");
errorMsg = "Device not found";
}
catch (TaskCanceledException)
{
System.Diagnostics.Debug.WriteLine("1 Error RunDeviceAsync(): Task cancelled");
errorMsg = "Task cancelled";
}
catch (OperationCanceledException eex)
{
System.Diagnostics.Debug.WriteLine("1 Error RunDeviceAsync(): Operation cancelled \r\n" + eex.Message);
errorMsg = "Operation cancelled";
}
catch (Exception ex)
{
if ((bool)(cancellationTokenSourceManual?.IsCancellationRequested))
{
System.Diagnostics.Debug.WriteLine("1 Error RunSvcAsync(): Cancelled.");
errorMsg += " Cancelled";
}
else if ((bool)(cancellationTokenSourceTimeout?.IsCancellationRequested))
{
System.Diagnostics.Debug.WriteLine("1 Error RunSvcAsync(): Timed Out.");
errorMsg += " Timed Out";
}
else if (!ex.Message.Contains("Timed out"))
{
System.Diagnostics.Debug.WriteLine("1 Error RunSvcAsync(): " + ex.Message);
errorMsg += " " + ex.Message;
}
else
{
System.Diagnostics.Debug.WriteLine("1 Error RunSvcAsync(): Timed out");
errorMsg += " Timed Out";
}
}
}
}
catch (Microsoft.Azure.Devices.Client.Exceptions.IotHubCommunicationException)
{
System.Diagnostics.Debug.WriteLine("2 Error RunDeviceAsync(): Hub connection failure");
errorMsg = "Hub connection failure";
}
catch (Microsoft.Azure.Devices.Common.Exceptions.DeviceNotFoundException)
{
System.Diagnostics.Debug.WriteLine("2 Error RunDeviceAsync(): Device not found");
errorMsg = "Device not found";
}
catch (TaskCanceledException)
{
System.Diagnostics.Debug.WriteLine("2 Error RunDeviceAsync(): Task cancelled");
errorMsg = "Task cancelled";
}
catch (OperationCanceledException eex)
{
System.Diagnostics.Debug.WriteLine("2 Error RunDeviceAsync(): Operation cancelled \r\n" + eex.Message);
errorMsg = "Operation cancelled";
}
catch (Exception ex)
{
if ((bool)(cancellationTokenSourceManual?.IsCancellationRequested))
{
System.Diagnostics.Debug.WriteLine("2 Error RunSvcAsync(): Cancelled.");
errorMsg += " Cancelled";
}
else if ((bool)(cancellationTokenSourceTimeout?.IsCancellationRequested))
{
System.Diagnostics.Debug.WriteLine("2 Error RunSvcAsync(): Timed Out.");
errorMsg += " Timed Out";
}
else if (!ex.Message.Contains("Timed out"))
{
System.Diagnostics.Debug.WriteLine("2 Error RunSvcAsync(): " + ex.Message);
errorMsg += " " + ex.Message;
}
else
{
System.Diagnostics.Debug.WriteLine("2 Error RunSvcAsync(): Timed out");
errorMsg += " Timed Out";
}
};
if (webSocket != null)
{
if (webSocket.CloseStatus != WebSocketCloseStatus.NormalClosure)
{
updateMsg = "Aborting Device Socket as is errant or cancelled: " + errorMsg;
UpdateStatus(updateMsg);
webSocket.Abort();
updateMsg = "Aborted Device Socket as was errant or cancelled: " + errorMsg;
UpdateStatus(updateMsg);
}
else
{
updateMsg = "Socket closed normally: " + errorMsg;
UpdateStatus(updateMsg);
}
}
else
{
if (isManualCancel)
{
updateMsg = "Socket closed Normally: Manually ";
}
else
{
updateMsg = "Socket closed Normally: " + errorMsg;
}
UpdateStatus(updateMsg);
}
webSocket = null;
cancellationTokenSourceTimeout = null;
}