private static MqttBasePacket DecodePublishPacket(byte header, IMqttPacketBodyReader body)
{
ThrowIfBodyIsEmpty(body);
var retain = (header & 1) > 0;
var qos = (MqttQualityOfServiceLevel)(header >> 1 & 3);
var dup = (header >> 3 & 1) > 0;
var packet = new MqttPublishPacket
{
Topic = body.ReadStringWithLengthPrefix(),
Retain = retain,
QualityOfServiceLevel = qos,
Dup = dup
};
if (qos > 0)
{
packet.PacketIdentifier = body.ReadTwoByteInteger();
}
var propertiesReader = new MqttV500PropertiesReader(body);
while (propertiesReader.MoveNext())
{
if (packet.Properties == null)
{
packet.Properties = new MqttPublishPacketProperties();
}
if (propertiesReader.CurrentPropertyId == MqttPropertyId.PayloadFormatIndicator)
{
packet.Properties.PayloadFormatIndicator = propertiesReader.ReadPayloadFormatIndicator();
}
else if (propertiesReader.CurrentPropertyId == MqttPropertyId.MessageExpiryInterval)
{
packet.Properties.MessageExpiryInterval = propertiesReader.ReadMessageExpiryInterval();
}
else if (propertiesReader.CurrentPropertyId == MqttPropertyId.TopicAlias)
{
packet.Properties.TopicAlias = propertiesReader.ReadTopicAlias();
}
else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ResponseTopic)
{
packet.Properties.ResponseTopic = propertiesReader.ReadResponseTopic();
}
else if (propertiesReader.CurrentPropertyId == MqttPropertyId.CorrelationData)
{
packet.Properties.CorrelationData = propertiesReader.ReadCorrelationData();
}
else if (propertiesReader.CurrentPropertyId == MqttPropertyId.SubscriptionIdentifier)
{
if (packet.Properties.SubscriptionIdentifiers == null)
{
packet.Properties.SubscriptionIdentifiers = new List <uint>();
}
packet.Properties.SubscriptionIdentifiers.Add(propertiesReader.ReadSubscriptionIdentifier());
}
else if (propertiesReader.CurrentPropertyId == MqttPropertyId.ContentType)
{
packet.Properties.ContentType = propertiesReader.ReadContentType();
}
else if (propertiesReader.CurrentPropertyId == MqttPropertyId.UserProperty)
{
if (packet.Properties.UserProperties == null)
{
packet.Properties.UserProperties = new List <MqttUserProperty>();
}
propertiesReader.AddUserPropertyTo(packet.Properties.UserProperties);
}
else
{
propertiesReader.ThrowInvalidPropertyIdException(typeof(MqttPublishPacket));
}
}
if (!body.EndOfStream)
{
packet.Payload = body.ReadRemainingData();
}
return(packet);
}