YangWX/MQTTnet
1
0
Fork 0
mirror of https://github.com/dotnet/MQTTnet.git synced 2026-10-19 02:53:06 +08:00
Code Issues Packages Projects Releases Wiki Activity

Refactor ASP net Core integration and fix breaking change.

Browse Source
This commit is contained in:
Christian Kratky
2018-06-17 17:19:08 +02:00
parent 8444b6b3be
commit 66048931a2
7 changed files with 51 additions and 63 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Source/MQTTnet.AspnetCore/ReaderExtensions.cs
+36 -39
View File
@@ -1,6 +1,5 @@
using System;
using System.Buffers;
using System.IO;
using MQTTnet.Adapter;
using MQTTnet.Exceptions;
using MQTTnet.Packets;
@@ -8,8 +7,43 @@ using MQTTnet.Serializer;
namespace MQTTnet.AspNetCore
{
public static class ReaderExtensions
public static class ReaderExtensions
{
public static bool TryDeserialize(this IMqttPacketSerializer serializer, in ReadOnlySequence<byte> input, out MqttBasePacket packet, out SequencePosition consumed, out SequencePosition observed)
{
packet = null;
consumed = input.Start;
observed = input.End;
var copy = input;
if (copy.Length < 2)
{
return false;
}
var fixedheader = copy.First.Span[0];
if (!TryReadBodyLength(ref copy, out var bodyLength))
{
return false;
}
var bodySlice = copy.Slice(0, bodyLength);
packet = serializer.Deserialize(new ReceivedMqttPacket(fixedheader, new MqttPacketBodyReader(bodySlice.GetArray(), 0)));
consumed = bodySlice.End;
observed = bodySlice.End;
return true;
}
private static byte[] GetArray(this in ReadOnlySequence<byte> input)
{
if (input.IsSingleSegment)
{
return input.First.Span.ToArray();
}
// Should be rare
return input.ToArray();
}
private static bool TryReadBodyLength(ref ReadOnlySequence<byte> input, out int result)
{
// Alorithm taken from https://docs.oasis-open.org/mqtt/mqtt/v3.1.1/errata01/os/mqtt-v3.1.1-errata01-os-complete.html.
@@ -44,42 +78,5 @@ namespace MQTTnet.AspNetCore
result = value;
return true;
}
public static byte[] GetArray(this in ReadOnlySequence<byte> input)
{
if (input.IsSingleSegment)
{
return input.First.Span.ToArray();
}
// Should be rare
return input.ToArray();
}
public static bool TryDeserialize(this IMqttPacketSerializer serializer, in ReadOnlySequence<byte> input, out MqttBasePacket packet, out SequencePosition consumed, out SequencePosition observed)
{
packet = null;
consumed = input.Start;
observed = input.End;
var copy = input;
if (copy.Length < 2)
{
return false;
}
var fixedheader = copy.First.Span[0];
if (!TryReadBodyLength(ref copy, out var bodyLength))
{
return false;
}
var bodySlice = copy.Slice(0, bodyLength);
packet = serializer.Deserialize(new ReceivedMqttPacket(fixedheader, new MqttPacketBodyReader(bodySlice.GetArray())));
consumed = bodySlice.End;
observed = bodySlice.End;
return true;
}
}
}