Added support for websockets

Frameworks/MQTTnet.NetStandard/Implementations/MqttWebSocketsChannel.cs

@@ -0,0 +1,119 @@
+using MQTTnet.Core.Channel;
+using MQTTnet.Core.Client;
+using MQTTnet.Core.Exceptions;
+using System;
+using System.Net.WebSockets;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MQTTnet.Implementations
+{
+    public sealed class MqttWebSocketsChannel : IMqttCommunicationChannel, IDisposable
+    {
+        private ClientWebSocket _webSocket = null;
+        private const int BufferSize = 4096;
+        private const int BufferAmplifier = 20;
+        private byte[] WebSocketBuffer = new byte[BufferSize * BufferAmplifier];
+        private int WebSocketBufferSize = 0;
+        private int WebSocketBufferOffset = 0;
+
+        public MqttWebSocketsChannel()
+        {
+            _webSocket = new ClientWebSocket();
+        }
+
+        public async Task ConnectAsync(MqttClientOptions options)
+        {
+            _webSocket = null;
+
+            try
+            {
+                _webSocket = new ClientWebSocket();
+
+                await _webSocket.ConnectAsync(new Uri(options.Server), CancellationToken.None);
+            }
+            catch (WebSocketException exception)
+            {
+                throw new MqttCommunicationException(exception);
+            }
+            finally
+            {
+            }
+        }
+
+        public async Task DisconnectAsync()
+        {
+            await _webSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, string.Empty, CancellationToken.None);
+        }
+
+        public void Dispose()
+        {
+            if (_webSocket != null)
+                _webSocket.Dispose();
+        }
+
+        public Task ReadAsync(byte[] buffer)
+        {
+            return Task.WhenAll(ReadToBufferAsync(buffer));
+        }
+
+        private async Task ReadToBufferAsync(byte[] buffer)
+        {
+            var temporaryBuffer = new byte[BufferSize];
+            var offset = 0;
+
+            while (_webSocket.State == WebSocketState.Open)
+            {
+                if (WebSocketBufferSize == 0)
+                {
+                    WebSocketBufferOffset = 0;
+
+                    WebSocketReceiveResult response;
+                    do
+                    {
+                        response =
+                            await _webSocket.ReceiveAsync(new ArraySegment<byte>(temporaryBuffer), CancellationToken.None);
+
+                        temporaryBuffer.CopyTo(WebSocketBuffer, offset);
+                        offset += response.Count;
+                        temporaryBuffer = new byte[BufferSize];
+                    } while (!response.EndOfMessage);
+
+                    WebSocketBufferSize = response.Count;
+                    if (response.MessageType == WebSocketMessageType.Close)
+                    {
+                        await _webSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, string.Empty, CancellationToken.None);
+                    }
+
+                    Buffer.BlockCopy(WebSocketBuffer, 0, buffer, 0, buffer.Length);
+                    WebSocketBufferSize -= buffer.Length;
+                    WebSocketBufferOffset += buffer.Length;
+                }
+                else
+                {
+                    Buffer.BlockCopy(WebSocketBuffer, WebSocketBufferOffset, buffer, 0, buffer.Length);
+                    WebSocketBufferSize -= buffer.Length;
+                    WebSocketBufferOffset += buffer.Length;
+                }
+
+                return;
+            }
+        }
+
+        public Task WriteAsync(byte[] buffer)
+        {
+            if (buffer == null) throw new ArgumentNullException(nameof(buffer));
+
+            var writeBuffer = System.Text.Encoding.ASCII.GetString(buffer);
+            try
+            {
+                return _webSocket.SendAsync(new ArraySegment<byte>(buffer), WebSocketMessageType.Binary, true,
+                 CancellationToken.None);
+            }
+            catch (WebSocketException exception)
+            {
+                throw new MqttCommunicationException(exception);
+            }
+        }
+    }
+}

Frameworks/MQTTnet.NetStandard/MQTTnet.Netstandard.csproj

@@ -24,6 +24,8 @@
 
   <ItemGroup>
     <PackageReference Include="System.Net.Security" Version="4.3.1" />
+    <PackageReference Include="System.Net.WebSockets" Version="4.3.0" />
+    <PackageReference Include="System.Net.WebSockets.Client" Version="4.3.1" />
     <PackageReference Include="System.Threading.Thread" Version="4.3.0" />
   </ItemGroup>
 

Frameworks/MQTTnet.NetStandard/MqttClientFactory.cs

@@ -3,6 +3,7 @@ using MQTTnet.Core.Adapter;
 using MQTTnet.Core.Client;
 using MQTTnet.Core.Serializer;
 using MQTTnet.Implementations;
+using MQTTnet.Core.Channel;
 
 namespace MQTTnet
 {
@@ -12,7 +13,23 @@ namespace MQTTnet
         {
             if (options == null) throw new ArgumentNullException(nameof(options));
 
-            return new MqttClient(options, new MqttChannelCommunicationAdapter(new MqttTcpChannel(), new MqttPacketSerializer()));
+            return new MqttClient(options, new MqttChannelCommunicationAdapter(GetMqttCommunicationChannel(options), new MqttPacketSerializer()));
+        }
+
+        private IMqttCommunicationChannel GetMqttCommunicationChannel(MqttClientOptions options)
+        {
+            switch (options.ConnectionType)
+            {
+                case ConnectionTypes.TCP:
+                case ConnectionTypes.TLS:
+                    return new MqttTcpChannel();
+                case ConnectionTypes.WS:
+                case ConnectionTypes.WSS:
+                    return new MqttWebSocketsChannel();
+
+                default:
+                    return null;
+            }
         }
     }
 }

MQTTnet.Core/Client/ConnectionType.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace MQTTnet.Core.Client
+{
+    public enum ConnectionTypes
+    {
+        TCP,
+        TLS,
+        WS,
+        WSS
+    }
+}

MQTTnet.Core/Client/MqttClientOptions.cs

@@ -24,5 +24,7 @@ namespace MQTTnet.Core.Client
         public TimeSpan DefaultCommunicationTimeout { get; set; } = TimeSpan.FromSeconds(10);
 
         public MqttProtocolVersion ProtocolVersion { get; set; } = MqttProtocolVersion.V311;
+
+        public ConnectionTypes ConnectionType { get; set; } = ConnectionTypes.TCP;
     }
 }

MQTTnet.TestApp.NetCore/MQTTnet.TestApp.NetCore.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Frameworks\MQTTnet.Netstandard\MQTTnet.NetStandard.csproj" />
+    <ProjectReference Include="..\MQTTnet.Core\MQTTnet.Core.csproj" />
+  </ItemGroup>
+
+</Project>

MQTTnet.TestApp.NetCore/Program.cs

@@ -0,0 +1,171 @@
+using MQTTnet.Core;
+using MQTTnet.Core.Client;
+using MQTTnet.Core.Diagnostics;
+using MQTTnet.Core.Packets;
+using MQTTnet.Core.Protocol;
+using MQTTnet.Core.Server;
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MQTTnet.TestApp.NetCore
+{
+    class Program
+    {
+        public static void Main(string[] args)
+        {
+            Console.WriteLine("MQTTnet - TestApp.NetFramework");
+            Console.WriteLine("1 = Start client");
+            Console.WriteLine("2 = Start server");
+            var pressedKey = Console.ReadKey(true);
+            if (pressedKey.Key == ConsoleKey.D1)
+            {
+                Task.Run(() => RunClientAsync(args));
+                Thread.Sleep(Timeout.Infinite);
+            }
+            else if (pressedKey.Key == ConsoleKey.D2)
+            {
+                Task.Run(() => RunServerAsync(args));
+                Thread.Sleep(Timeout.Infinite);
+            }
+        }
+
+        private static async Task RunClientAsync(string[] arguments)
+        {
+
+            MqttTrace.TraceMessagePublished += (s, e) =>
+            {
+                Console.WriteLine($">> [{e.ThreadId}] [{e.Source}] [{e.Level}]: {e.Message}");
+                if (e.Exception != null)
+                {
+                    Console.WriteLine(e.Exception);
+                }
+            };
+
+            try
+            {
+                var options = new MqttClientOptions
+                {
+                    Server = "localhost",
+                    ClientId = "XYZ",
+                    CleanSession = true,
+                    ConnectionType = ConnectionTypes.WS 
+                };
+
+                var client = new MqttClientFactory().CreateMqttClient(options);
+                client.ApplicationMessageReceived += (s, e) =>
+                {
+                    Console.WriteLine("### RECEIVED APPLICATION MESSAGE ###");
+                    Console.WriteLine($"+ Topic = {e.ApplicationMessage.Topic}");
+                    Console.WriteLine($"+ Payload = {Encoding.UTF8.GetString(e.ApplicationMessage.Payload)}");
+                    Console.WriteLine($"+ QoS = {e.ApplicationMessage.QualityOfServiceLevel}");
+                    Console.WriteLine($"+ Retain = {e.ApplicationMessage.Retain}");
+                    Console.WriteLine();
+                };
+
+                client.Connected += async (s, e) =>
+                {
+                    Console.WriteLine("### CONNECTED WITH SERVER ###");
+
+                    await client.SubscribeAsync(new List<TopicFilter>
+                    {
+                        new TopicFilter("#", MqttQualityOfServiceLevel.AtMostOnce)
+                    });
+
+                    Console.WriteLine("### SUBSCRIBED ###");
+                };
+
+                client.Disconnected += async (s, e) =>
+                {
+                    Console.WriteLine("### DISCONNECTED FROM SERVER ###");
+                    await Task.Delay(TimeSpan.FromSeconds(5));
+
+                    try
+                    {
+                        await client.ConnectAsync();
+                    }
+                    catch
+                    {
+                        Console.WriteLine("### RECONNECTING FAILED ###");
+                    }
+                };
+
+                try
+                {
+                    await client.ConnectAsync();
+                }
+                catch (Exception exception)
+                {
+                    Console.WriteLine("### CONNECTING FAILED ###" + Environment.NewLine + exception);
+                }
+
+                Console.WriteLine("### WAITING FOR APPLICATION MESSAGES ###");
+
+                while (true)
+                {
+                    Console.ReadLine();
+
+                    var applicationMessage = new MqttApplicationMessage(
+                        "A/B/C",
+                        Encoding.UTF8.GetBytes("Hello World"),
+                        MqttQualityOfServiceLevel.AtLeastOnce,
+                        false
+                    );
+
+                    await client.PublishAsync(applicationMessage);
+                }
+            }
+            catch (Exception exception)
+            {
+                Console.WriteLine(exception);
+            }
+        }
+
+        private static void RunServerAsync(string[] arguments)
+        {
+            MqttTrace.TraceMessagePublished += (s, e) =>
+            {
+                Console.WriteLine($">> [{e.ThreadId}] [{e.Source}] [{e.Level}]: {e.Message}");
+                if (e.Exception != null)
+                {
+                    Console.WriteLine(e.Exception);
+                }
+            };
+
+            try
+            {
+                var options = new MqttServerOptions
+                {
+                    ConnectionValidator = p =>
+                    {
+                        if (p.ClientId == "SpecialClient")
+                        {
+                            if (p.Username != "USER" || p.Password != "PASS")
+                            {
+                                return MqttConnectReturnCode.ConnectionRefusedBadUsernameOrPassword;
+                            }
+                        }
+
+                        return MqttConnectReturnCode.ConnectionAccepted;
+                    }
+                };
+
+                var mqttServer = new MqttServerFactory().CreateMqttServer(options);
+                mqttServer.Start();
+
+                Console.WriteLine("Press any key to exit.");
+                Console.ReadLine();
+
+                mqttServer.Stop();
+            }
+            catch (Exception e)
+            {
+                Console.WriteLine(e);
+            }
+
+            Console.ReadLine();
+        }
+    }
+}

MQTTnet.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 15
-VisualStudioVersion = 15.0.26730.8
+VisualStudioVersion = 15.0.26730.12
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MQTTnet.Core.Tests", "Tests\MQTTnet.Core.Tests\MQTTnet.Core.Tests.csproj", "{A7FF0C91-25DE-4BA6-B39E-F54E8DADF1CC}"
 EndProject
@@ -32,6 +32,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		README.md = README.md
 	EndProjectSection
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MQTTnet.TestApp.NetCore", "MQTTnet.TestApp.NetCore\MQTTnet.TestApp.NetCore.csproj", "{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -162,6 +164,22 @@ Global
 		{3587E506-55A2-4EB3-99C7-DC01E42D25D2}.Release|x64.Build.0 = Release|Any CPU
 		{3587E506-55A2-4EB3-99C7-DC01E42D25D2}.Release|x86.ActiveCfg = Release|Any CPU
 		{3587E506-55A2-4EB3-99C7-DC01E42D25D2}.Release|x86.Build.0 = Release|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Debug|ARM.ActiveCfg = Debug|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Debug|ARM.Build.0 = Debug|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Debug|x64.Build.0 = Debug|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Debug|x86.Build.0 = Debug|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Release|Any CPU.Build.0 = Release|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Release|ARM.ActiveCfg = Release|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Release|ARM.Build.0 = Release|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Release|x64.ActiveCfg = Release|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Release|x64.Build.0 = Release|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Release|x86.ActiveCfg = Release|Any CPU
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -173,6 +191,7 @@ Global
 		{D9D74F33-6943-49B2-B765-7BD589082098} = {9248C2E1-B9D6-40BF-81EC-86004D7765B4}
 		{FF1F72D6-9524-4422-9497-3CC0002216ED} = {9248C2E1-B9D6-40BF-81EC-86004D7765B4}
 		{3587E506-55A2-4EB3-99C7-DC01E42D25D2} = {32A630A7-2598-41D7-B625-204CD906F5FB}
+		{4094DDF0-1DFB-4FA7-A2FA-AD5A44545453} = {9248C2E1-B9D6-40BF-81EC-86004D7765B4}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {07536672-5CBC-4BE3-ACE0-708A431A7894}

Tests/MQTTnet.TestApp.NetFramework/MQTTnet.TestApp.NetFramework.csproj

@@ -90,7 +90,7 @@
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\Frameworks\MQTTnet.NetFramework\MQTTnet.NetFramework.csproj">
-      <Project>{A480EF90-0EAA-4D9A-B271-47A9C47F6F7D}</Project>
+      <Project>{a480ef90-0eaa-4d9a-b271-47a9c47f6f7d}</Project>
       <Name>MQTTnet.NetFramework</Name>
     </ProjectReference>
     <ProjectReference Include="..\..\MQTTnet.Core\MQTTnet.Core.csproj">

Tests/MQTTnet.TestApp.NetFramework/Program.cs

@@ -34,6 +34,7 @@ namespace MQTTnet.TestApp.NetFramework
 
         private static async Task RunClientAsync(string[] arguments)
         {
+
             MqttTrace.TraceMessagePublished += (s, e) =>
             {
                 Console.WriteLine($">> [{e.ThreadId}] [{e.Source}] [{e.Level}]: {e.Message}");