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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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Frameworks/MQTTnet.NetFramework/Implementations/MqttWebSocketChannel.cs
+6 -59
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@@ -2,6 +2,7 @@
using MQTTnet.Core.Client;
using MQTTnet.Core.Exceptions;
using System;
using System.IO;
using System.Net.WebSockets;
using System.Threading;
using System.Threading.Tasks;
@@ -11,8 +12,8 @@ namespace MQTTnet.Implementations
public sealed class MqttWebSocketChannel : IMqttCommunicationChannel, IDisposable
{
private ClientWebSocket _webSocket = new ClientWebSocket();
private int WebSocketBufferSize;
private int WebSocketBufferOffset;
public Stream Stream { get; private set; }
public async Task ConnectAsync(MqttClientOptions options)
{
@@ -22,6 +23,8 @@ namespace MQTTnet.Implementations
{
_webSocket = new ClientWebSocket();
await _webSocket.ConnectAsync(new Uri(options.Server), CancellationToken.None);
Stream = new WebSocketStream(_webSocket);
}
catch (WebSocketException exception)
{
@@ -31,6 +34,7 @@ namespace MQTTnet.Implementations
public Task DisconnectAsync()
{
Stream = null;
return _webSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, string.Empty, CancellationToken.None);
}
@@ -38,62 +42,5 @@ namespace MQTTnet.Implementations
{
_webSocket?.Dispose();
}
public async Task<ArraySegment<byte>> ReadAsync(int length, byte[] buffer)
{
await ReadToBufferAsync(length, buffer).ConfigureAwait(false);
var result = new ArraySegment<byte>(buffer, WebSocketBufferOffset, length);
WebSocketBufferSize -= length;
WebSocketBufferOffset += length;
return result;
}
private async Task ReadToBufferAsync(int length, byte[] buffer)
{
if (WebSocketBufferSize > 0)
{
return;
}
var offset = 0;
while (_webSocket.State == WebSocketState.Open && WebSocketBufferSize < length)
{
WebSocketReceiveResult response;
do
{
response = await _webSocket.ReceiveAsync(new ArraySegment<byte>(buffer, offset, buffer.Length - offset), CancellationToken.None).ConfigureAwait(false);
offset += response.Count;
} while (!response.EndOfMessage);
WebSocketBufferSize = response.Count;
if (response.MessageType == WebSocketMessageType.Close)
{
await _webSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, string.Empty, CancellationToken.None).ConfigureAwait(false);
}
}
}
public async Task WriteAsync(byte[] buffer)
{
if (buffer == null) {
throw new ArgumentNullException(nameof(buffer));
}
try
{
await _webSocket.SendAsync(new ArraySegment<byte>(buffer), WebSocketMessageType.Binary, true, CancellationToken.None);
}
catch (WebSocketException exception)
{
throw new MqttCommunicationException(exception);
}
}
public int Peek()
{
return WebSocketBufferSize;
}
}
}