public void Serialize_LargePacket()
{
var serializer = new MqttPacketSerializer {
ProtocolVersion = MqttProtocolVersion.V311
};
const int payloadLength = 80000;
var payload = new byte[payloadLength];
var value = 0;
for (var i = 0; i < payloadLength; i++)
{
if (value > 255)
{
value = 0;
}
payload[i] = (byte)value;
}
var publishPacket = new MqttPublishPacket
{
Topic = "abcdefghijklmnopqrstuvwxyz0123456789",
Payload = payload
};
var buffer = serializer.Serialize(publishPacket);
var testChannel = new TestMqttChannel(new MemoryStream(buffer.Array, buffer.Offset, buffer.Count));
var header = MqttPacketReader.ReadFixedHeaderAsync(
testChannel,
new byte[2],
new byte[1],
CancellationToken.None).GetAwaiter().GetResult();
var eof = buffer.Offset + buffer.Count;
var receivedPacket = new ReceivedMqttPacket(
header.Flags,
new MqttPacketBodyReader(buffer.Array, eof - header.RemainingLength, buffer.Count + buffer.Offset));
var packet = (MqttPublishPacket)serializer.Deserialize(receivedPacket);
Assert.AreEqual(publishPacket.Topic, packet.Topic);
Assert.IsTrue(publishPacket.Payload.SequenceEqual(packet.Payload));
}
private static void DeserializeAndCompare(MqttBasePacket packet, string expectedBase64Value)
{
var serializer = new MqttPacketSerializer();
var buffer1 = serializer.Serialize(packet);
using (var headerStream = new MemoryStream(Join(buffer1)))
{
var header = MqttPacketReader.ReadHeaderFromSource(headerStream, CancellationToken.None);
using (var bodyStream = new MemoryStream(Join(buffer1), (int)headerStream.Position, header.BodyLength))
{
var deserializedPacket = serializer.Deserialize(header, bodyStream.ToArray());
var buffer2 = serializer.Serialize(deserializedPacket);
Assert.AreEqual(expectedBase64Value, Convert.ToBase64String(Join(buffer2)));
}
}
}
private static void DeserializeAndCompare(MqttBasePacket packet, string expectedBase64Value, MqttProtocolVersion protocolVersion = MqttProtocolVersion.V311)
{
var serializer = new MqttPacketSerializer {
ProtocolVersion = protocolVersion
};
var buffer1 = serializer.Serialize(packet);
using (var headerStream = new MemoryStream(Join(buffer1)))
{
var header = MqttPacketReader.ReadHeaderAsync(headerStream, CancellationToken.None).GetAwaiter().GetResult();
using (var bodyStream = new MemoryStream(Join(buffer1), (int)headerStream.Position, header.BodyLength))
{
var deserializedPacket = serializer.Deserialize(header, bodyStream);
var buffer2 = serializer.Serialize(deserializedPacket);
Assert.AreEqual(expectedBase64Value, Convert.ToBase64String(Join(buffer2)));
}
}
}
private static T Roundtrip <T>(T packet, MqttProtocolVersion protocolVersion = MqttProtocolVersion.V311)
where T : MqttBasePacket
{
var serializer = new MqttPacketSerializer {
ProtocolVersion = protocolVersion
};
var buffer1 = serializer.Serialize(packet);
using (var headerStream = new MemoryStream(Join(buffer1)))
{
var channel = new TestMqttChannel(headerStream);
var fixedHeader = new byte[2];
var singleByteBuffer = new byte[1];
var header = MqttPacketReader.ReadFixedHeaderAsync(channel, fixedHeader, singleByteBuffer, CancellationToken.None).GetAwaiter().GetResult();
using (var bodyStream = new MemoryStream(Join(buffer1), (int)headerStream.Position, header.RemainingLength))
{
return((T)serializer.Deserialize(new ReceivedMqttPacket(header.Flags, new MqttPacketBodyReader(bodyStream.ToArray(), 0, (int)bodyStream.Length))));
}
}
}
private static void DeserializeAndCompare(MqttBasePacket packet, string expectedBase64Value, MqttProtocolVersion protocolVersion = MqttProtocolVersion.V311)
{
var serializer = new MqttPacketSerializer {
ProtocolVersion = protocolVersion
};
var buffer1 = serializer.Serialize(packet);
using (var headerStream = new MemoryStream(Join(buffer1)))
{
var channel = new TestMqttChannel(headerStream);
var fixedHeader = new byte[2];
var singleByteBuffer = new byte[1];
var header = MqttPacketReader.ReadFixedHeaderAsync(channel, fixedHeader, singleByteBuffer, CancellationToken.None).GetAwaiter().GetResult();
using (var bodyStream = new MemoryStream(Join(buffer1), (int)headerStream.Position, header.RemainingLength))
{
var deserializedPacket = serializer.Deserialize(new ReceivedMqttPacket(header.Flags, new MqttPacketBodyReader(bodyStream.ToArray(), 0, (int)bodyStream.Length)));
var buffer2 = serializer.Serialize(deserializedPacket);
Assert.AreEqual(expectedBase64Value, Convert.ToBase64String(Join(buffer2)));
}
}
}