private async Task ReceiveWorker(CancellationToken cancellationToken)
{
Microsoft.Azure.Devices.Client.Message message = null;
INetworkPacket packet = null;
while (!cancellationToken.IsCancellationRequested)
{
try
{
message = await _device.Receive();
if (message == null)
{
continue;
}
var messageType = MessageType.PULL_RESP;// Enum.Parse(typeof(MessageType), message.Properties["MessageType"]);
var data = message.GetBytes();
_logger.Info($"Receiving '{messageType}' packet from IoT Hub by deviceid '{_deviceId}'", GetType().Name);
switch (messageType)
{
case MessageType.PULL_RESP:
{
packet = new PullRespPacket
{
ProtocolVersion = int.Parse(message.Properties["ProtocolVersion"]),
//Token = message.Properties["Token"],
Payload = _payloadSerializer.Deserialize <PullRespPacketPayload>(data),
};
}
break;
default:
{
continue;
}
}
PacketReceived(this, new PacketEventArgs(packet, this));
}
catch (BrokenCircuitException ex)
{
_logger.Error($"Circuit breaker open -> An error occured while receiving a message from IoT Hub by deviceid '{_deviceId}'", GetType().Name, ex);
await Task.Delay(TimeSpan.FromSeconds(30));
}
catch (Exception ex)
{
_logger.Error($"An error occured while receiving a message from IoT Hub by deviceid '{_deviceId}'", GetType().Name, ex);
}
}
}
public INetworkPacket Deserialize(BinaryReader reader)
{
var buffer = reader.ReadBytes((int)reader.BaseStream.Length);
var messageType = (MessageType)buffer[3];
try
{
switch (messageType)
{
case MessageType.PUSH_ACK:
{
var protocolVersion = (int)buffer[0];
var packet = new PushAckPacket
{
ProtocolVersion = protocolVersion,
Token = BitConverter.ToUInt16(buffer, 1),
};
return(packet);
}
case MessageType.PULL_ACK:
{
var protocolVersion = (int)buffer[0];
var packet = new PullAckPacket
{
ProtocolVersion = protocolVersion,
Token = BitConverter.ToUInt16(buffer, 1),
};
return(packet);
}
case MessageType.PULL_RESP:
{
var json = Encoding.ASCII.GetString(buffer, 4, buffer.Length - 4);
var protocolVersion = (int)buffer[0];
var packet = new PullRespPacket
{
ProtocolVersion = protocolVersion,
Token = BitConverter.ToUInt16(buffer, 1),
Payload = _payloadSerialiser.Deserialize <PullRespPacketPayload>(json, protocolVersion)
};
return(packet);
}
case MessageType.PUSH_DATA:
{
var json = Encoding.ASCII.GetString(buffer, 12, buffer.Length - 12);
var eui = buffer.Skip(4).Take(8).ToArray().ToHex(string.Empty);
var protocolVersion = (int)buffer[0];
var packet = new PushDataPacket
{
ProtocolVersion = protocolVersion,
Token = BitConverter.ToUInt16(buffer, 1),
Eui = eui,
Payload = _payloadSerialiser.Deserialize <PushDataPacketPayload>(json, protocolVersion)
};
return(packet);
}
case MessageType.PULL_DATA:
{
var protocolVersion = (int)buffer[0];
var json = Encoding.ASCII.GetString(buffer, 12, buffer.Length - 12);
var eui = buffer.Skip(4).Take(8).ToArray().ToHex(string.Empty);
var packet = new PullDataPacket
{
ProtocolVersion = protocolVersion,
Token = BitConverter.ToUInt16(buffer, 1),
Eui = eui,
};
return(packet);
}
case MessageType.TX_ACK:
{
var json = Encoding.ASCII.GetString(buffer, 12, buffer.Length - 12);
var eui = buffer.Skip(4).Take(8).ToArray().ToHex(string.Empty);
var protocolVersion = (int)buffer[0];
var packet = new TxAckPacket
{
ProtocolVersion = protocolVersion,
Token = BitConverter.ToUInt16(buffer, 1),
Eui = eui,
Payload = _payloadSerialiser.Deserialize <TxAckPacketPayload>(json, protocolVersion)
};
return(packet);
}
default: throw new NotImplementedException($"Message type '{messageType.GetType().Name}' is not yet implemented.");
}
}
catch (Exception ex)
{
throw new PicocellDeserializeException($"Could not deserialize message with message type {messageType.ToString()}.", buffer, ex);
}
}