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use streams

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This commit is contained in:
Eggers Jan
2017-09-13 09:10:41 +02:00
parent 1a1c0beabc
commit 16a184a92f
15 changed files with 329 additions and 435 deletions
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MQTTnet.Core/Serializer/MqttPacketReader.cs
+5 -23
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@@ -49,13 +49,13 @@ namespace MQTTnet.Core.Serializer
return ReadBytes(_header.BodyLength - (int)BaseStream.Position);
}
public static async Task<MqttPacketHeader> ReadHeaderFromSourceAsync(IMqttCommunicationChannel source, byte[] buffer)
public static MqttPacketHeader ReadHeaderFromSource(IMqttCommunicationChannel source)
{
var fixedHeader = await ReadStreamByteAsync(source, buffer).ConfigureAwait(false);
var fixedHeader = (byte)source.Stream.ReadByte();
var byteReader = new ByteReader(fixedHeader);
byteReader.Read(4);
var controlPacketType = (MqttControlPacketType)byteReader.Read(4);
var bodyLength = await ReadBodyLengthFromSourceAsync(source, buffer).ConfigureAwait(false);
var bodyLength = ReadBodyLengthFromSource(source);
return new MqttPacketHeader()
{
@@ -64,26 +64,8 @@ namespace MQTTnet.Core.Serializer
BodyLength = bodyLength
};
}
private static async Task<byte> ReadStreamByteAsync(IMqttCommunicationChannel source, byte[] readBuffer)
{
var result = await ReadFromSourceAsync(source, 1, readBuffer).ConfigureAwait(false);
return result.Array[result.Offset];
}
public static async Task<ArraySegment<byte>> ReadFromSourceAsync(IMqttCommunicationChannel source, int length, byte[] buffer)
{
try
{
return await source.ReadAsync(length, buffer);
}
catch (Exception exception)
{
throw new MqttCommunicationException(exception);
}
}
private static async Task<int> ReadBodyLengthFromSourceAsync(IMqttCommunicationChannel source, byte[] buffer)
private static int ReadBodyLengthFromSource(IMqttCommunicationChannel source)
{
// Alorithm taken from http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html.
var multiplier = 1;
@@ -91,7 +73,7 @@ namespace MQTTnet.Core.Serializer
byte encodedByte;
do
{
encodedByte = await ReadStreamByteAsync(source, buffer).ConfigureAwait(false);
encodedByte = (byte)source.Stream.ReadByte();
value += (encodedByte & 127) * multiplier;
multiplier *= 128;
if (multiplier > 128 * 128 * 128)