protected override Publish Read(byte[] bytes)
{
var remainingLengthBytesLength = 0;
var remainingLength = MqttProtocol.Encoding.DecodeRemainingLength(bytes, out remainingLengthBytesLength);
var packetFlags = bytes.Byte(0).Bits(5, 4);
if (packetFlags.Bits(6, 2) == 0x03)
{
throw new MqttException(Properties.Resources.Formatter_InvalidQualityOfService);
}
var qos = (MqttQualityOfService)packetFlags.Bits(6, 2);
var duplicated = packetFlags.IsSet(3);
if (qos == MqttQualityOfService.AtMostOnce && duplicated)
{
throw new MqttException(Properties.Resources.PublishFormatter_InvalidDuplicatedWithQoSZero);
}
var retainFlag = packetFlags.IsSet(0);
var topicStartIndex = 1 + remainingLengthBytesLength;
var nextIndex = 0;
var topic = bytes.GetString(topicStartIndex, out nextIndex);
if (!topicEvaluator.IsValidTopicName(topic))
{
var error = string.Format(Properties.Resources.PublishFormatter_InvalidTopicName, topic);
throw new MqttException(error);
}
var variableHeaderLength = topic.Length + 2;
var packetId = default(ushort?);
if (qos != MqttQualityOfService.AtMostOnce)
{
packetId = bytes.Bytes(nextIndex, 2).ToUInt16();
variableHeaderLength += 2;
}
var publish = new Publish(topic, qos, retainFlag, duplicated, packetId);
if (remainingLength > variableHeaderLength)
{
var payloadStartIndex = 1 + remainingLengthBytesLength + variableHeaderLength;
publish.Payload = bytes.Bytes(payloadStartIndex);
}
return(publish);
}
protected override Publish Read(byte[] bytes)
{
int remainingLength = MqttProtocol.Encoding.DecodeRemainingLength(bytes, out int remainingLengthBytesLength);
byte packetFlags = bytes.Byte(0).Bits(5, 4);
if (packetFlags.Bits(6, 2) == 0x03)
{
throw new MqttException(ClientProperties.Formatter_InvalidQualityOfService);
}
MqttQualityOfService qos = (MqttQualityOfService)packetFlags.Bits(6, 2);
bool duplicated = packetFlags.IsSet(3);
if (qos == MqttQualityOfService.AtMostOnce && duplicated)
{
throw new MqttException(ClientProperties.PublishFormatter_InvalidDuplicatedWithQoSZero);
}
bool retainFlag = packetFlags.IsSet(0);
int topicStartIndex = 1 + remainingLengthBytesLength;
string topic = bytes.GetString(topicStartIndex, out int nextIndex);
if (!_topicEvaluator.IsValidTopicName(topic))
{
throw new MqttException(ClientProperties.PublishFormatter_InvalidTopicName(topic));
}
int variableHeaderLength = topic.Length + 2;
ushort?packetId = default;
if (qos != MqttQualityOfService.AtMostOnce)
{
packetId = bytes.Bytes(nextIndex, 2).ToUInt16();
variableHeaderLength += 2;
}
Publish publish = new Publish(topic, qos, retainFlag, duplicated, packetId);
if (remainingLength > variableHeaderLength)
{
int payloadStartIndex = 1 + remainingLengthBytesLength + variableHeaderLength;
publish.Payload = bytes.Bytes(payloadStartIndex);
}
return(publish);
}