internal void PublishReceived(IMqttSession session, MqttPublishMessage publishMessage)
{
if (publishMessage.Header.Qos == MqttQos.BestEffort && session.HasQoS2(publishMessage.VariableHeader.MessageIdentifier))
{
var pubRec = new MqttPublishReceivedMessage()
.WithMessageIdentifier(publishMessage.VariableHeader.MessageIdentifier);
session.Write(pubRec);
}
if (publishMessage.Header.Retain)
{
this.storageProvider.PutRetained(publishMessage.VariableHeader.TopicName, publishMessage.Payload.Message.ToArray());
}
PublishMessage(GetSubscriptions(publishMessage.VariableHeader.TopicName), publishMessage.VariableHeader.TopicName, publishMessage.Payload.Message.ToArray());
switch (publishMessage.Header.Qos)
{
case MqttQos.AtLeastOnce:
var puback = new MqttPublishAckMessage().WithMessageIdentifier(publishMessage.VariableHeader.MessageIdentifier);
session.Write(puback);
break;
case MqttQos.AtMostOnce:
session.StoreQoS2(publishMessage.VariableHeader.MessageIdentifier);
var pubRec = new MqttPublishReleaseMessage().WithMessageIdentifier(publishMessage.VariableHeader.MessageIdentifier);
session.Write(pubRec);
break;
case MqttQos.BestEffort:
default:
break;
}
}
private void SubscribeReceived(IMqttSession session, MqttSubscribeMessage subscribeMessage)
{
MqttSubscribeAckMessage subAck = new MqttSubscribeAckMessage().WithMessageIdentifier(subscribeMessage.VariableHeader.MessageIdentifier);
AddSubscriptions(session, subscribeMessage.Payload.Subscriptions);
session.Write(subAck);
PublishMessages(session, storageProvider.GetRetained(subscribeMessage.Payload.Subscriptions), true);
}
private void PublishMessages(IMqttSession session, IEnumerable <Tuple <string, MqttQos, byte[]> > messages, bool retained)
{
foreach (var message in messages)
{
string messageId = null;
short? packetId = null;
//QOS 1 or 2, store in storage, and in session.
if (message.Item2 != MqttQos.BestEffort)
{
messageId = storageProvider.StoreMessage(new InFlightMessage(message.Item1, message.Item3));
session.Publish(messageId, message.Item2);
}
else
{
//QoS 0 just publish, that way the session can keep a straight up queue and not block QoS 0 messages from
//intervening.
MqttPublishMessage publishMessage = new MqttPublishMessage().WithQos(message.Item2).ToTopic(message.Item1).PublishData(message.Item3);
publishMessage.Header.Retain = retained;
publishMessage.Header.Duplicate = false;
session.Write(publishMessage);
}
}
}
