Merge branch 'develop' of https://github.com/chkr1011/MQTTnet into develop

.gitignore

@@ -289,3 +289,5 @@ __pycache__/
 
 
 Build/nuget.exe
+*.js
+*.map

Frameworks/MQTTnet.AspnetCore/ApplicationBuilderExtensions.cs

@@ -0,0 +1,42 @@
+using System;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.Extensions.DependencyInjection;
+using MQTTnet.AspNetCore;
+using MQTTnet.Core.Server;
+
+namespace MQTTnet.AspnetCore
+{
+    public static class ApplicationBuilderExtensions
+    {
+        public static IApplicationBuilder UseMqttEndpoint(this IApplicationBuilder app, string path = "/mqtt")
+        {
+            app.UseWebSockets();
+            app.Use(async (context, next) =>
+            {
+                if (context.Request.Path == path && context.WebSockets.IsWebSocketRequest)
+                {
+                    var adapter = app.ApplicationServices.GetRequiredService<MqttWebSocketServerAdapter>();
+                    using (var webSocket = await context.WebSockets.AcceptWebSocketAsync("mqtt"))
+                    {
+                        await adapter.AcceptWebSocketAsync(webSocket);
+                    }
+                }
+                else
+                {
+                    await next();
+                }
+            });
+
+            return app;
+        }
+
+        public static IApplicationBuilder UseMqttServer(this IApplicationBuilder app, Action<IMqttServer> configure)
+        {
+            var server = app.ApplicationServices.GetRequiredService<IMqttServer>();
+
+            configure(server);
+
+            return app;
+        }
+    }
+}

Frameworks/MQTTnet.AspnetCore/MQTTnet.AspnetCore.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.0.0" />
+    <PackageReference Include="Microsoft.AspNetCore.WebSockets" Version="2.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="2.0.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\MQTTnet.Netstandard\MQTTnet.NetStandard.csproj" />
+  </ItemGroup>
+
+</Project>

Frameworks/MQTTnet.AspnetCore/MqttHostedServer.cs

@@ -0,0 +1,29 @@
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using MQTTnet.Core.Adapter;
+using MQTTnet.Core.Server;
+
+namespace MQTTnet.AspnetCore
+{
+    public class MqttHostedServer : MqttServer, IHostedService
+    {
+        public MqttHostedServer(IOptions<MqttServerOptions> options, IEnumerable<IMqttServerAdapter> adapters, ILogger<MqttServer> logger, MqttClientSessionsManager clientSessionsManager) 
+            : base(options, adapters, logger, clientSessionsManager)
+        {
+        }
+
+        public Task StartAsync(CancellationToken cancellationToken)
+        {
+            return StartAsync();
+        }
+
+        public Task StopAsync(CancellationToken cancellationToken)
+        {
+            return StopAsync();
+        }
+    }
+}

Tests/MQTTnet.TestApp.AspNetCore2/MqttWebSocketServerAdapter.cs → Frameworks/MQTTnet.AspnetCore/MqttWebSocketServerAdapter.cs

@@ -5,21 +5,17 @@ using System.Threading;
 using System.Threading.Tasks;
 using MQTTnet.Core.Adapter;
 using MQTTnet.Core.Channel;
-using MQTTnet.Core.Serializer;
 using MQTTnet.Core.Server;
 using MQTTnet.Implementations;
-using Microsoft.Extensions.Logging;
 
-namespace MQTTnet.TestApp.AspNetCore2
+namespace MQTTnet.AspNetCore
 {
     public class MqttWebSocketServerAdapter : IMqttServerAdapter, IDisposable
     {
-        private readonly ILogger<MqttWebSocketServerAdapter> _logger;
         private readonly IMqttCommunicationAdapterFactory _mqttCommunicationAdapterFactory;
 
-        public MqttWebSocketServerAdapter(ILogger<MqttWebSocketServerAdapter> logger, IMqttCommunicationAdapterFactory mqttCommunicationAdapterFactory)
+        public MqttWebSocketServerAdapter(IMqttCommunicationAdapterFactory mqttCommunicationAdapterFactory)
         {
-            _logger = logger ?? throw new ArgumentNullException(nameof(logger));
             _mqttCommunicationAdapterFactory = mqttCommunicationAdapterFactory ?? throw new ArgumentNullException(nameof(mqttCommunicationAdapterFactory));
         }
 
@@ -32,7 +28,7 @@ namespace MQTTnet.TestApp.AspNetCore2
 
         public Task StopAsync()
         {
-            return Task.FromResult(0);
+            return Task.CompletedTask;
         }
 
         public Task AcceptWebSocketAsync(WebSocket webSocket)

Frameworks/MQTTnet.AspnetCore/ServiceCollectionExtensions.cs

@@ -0,0 +1,25 @@
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using MQTTnet.AspNetCore;
+using MQTTnet.Core.Adapter;
+using MQTTnet.Core.Server;
+
+namespace MQTTnet.AspnetCore
+{
+    public static class ServiceCollectionExtensions
+    {
+        public static IServiceCollection AddHostedMqttServer(this IServiceCollection services)
+        {
+            services.AddMqttServerServices();
+
+            services.AddSingleton<IHostedService>(s => s.GetService<MqttHostedServer>());
+            services.AddSingleton<IMqttServer>(s => s.GetService<MqttHostedServer>());
+            services.AddSingleton<MqttHostedServer>();
+            
+            services.AddSingleton<MqttWebSocketServerAdapter>();
+            services.AddSingleton<IMqttServerAdapter>(s => s.GetService<MqttWebSocketServerAdapter>());
+
+            return services;
+        }
+    }
+}

Frameworks/MQTTnet.NetStandard/Implementations/WebSocketStream.cs

@@ -3,6 +3,7 @@ using System.IO;
 using System.Net.WebSockets;
 using System.Threading;
 using System.Threading.Tasks;
+using MQTTnet.Core.Exceptions;
 
 namespace MQTTnet.Implementations
 {
@@ -41,6 +42,7 @@ namespace MQTTnet.Implementations
             {
                 var response = await _webSocket.ReceiveAsync(new ArraySegment<byte>(buffer, currentOffset, count), cancellationToken).ConfigureAwait(false);
                 currentOffset += response.Count;
+                count -= response.Count;
 
                 if (response.MessageType == WebSocketMessageType.Close)
                 {
@@ -48,6 +50,11 @@ namespace MQTTnet.Implementations
                 }
             }
 
+            if (_webSocket.State == WebSocketState.Closed)
+            {
+                throw new MqttCommunicationException( "connection closed" );
+            }
+
             return currentOffset - offset;
         }
 

Frameworks/MQTTnet.NetStandard/ServiceCollectionExtensions.cs

@@ -15,14 +15,20 @@ namespace MQTTnet
     {
         public static IServiceCollection AddMqttServer(this IServiceCollection services)
         {
-            services.AddOptions();
-            services.AddSingleton<MqttFactory>();
-            services.AddSingleton<IMqttCommunicationAdapterFactory, MqttFactory>();
-            services.AddSingleton<IMqttClientSesssionFactory, MqttFactory>();
+            services.AddMqttServerServices();
+            
+            services.AddSingleton<IMqttServer>(s => s.GetService<MqttServer>());
+            services.AddSingleton<MqttServer>();
 
+            return services;
+        }
 
-            services.AddSingleton<IMqttServer,MqttServer>();
-            services.AddSingleton<MqttServer>();
+        public static IServiceCollection AddMqttServerServices(this IServiceCollection services)
+        {
+            services.AddOptions();
+            services.AddSingleton<MqttFactory>();
+            services.AddSingleton<IMqttCommunicationAdapterFactory>(s => s.GetService<MqttFactory>());
+            services.AddSingleton<IMqttClientSesssionFactory>(s => s.GetService<MqttFactory>());
 
             services.AddTransient<IMqttServerAdapter, MqttServerAdapter>();
             services.AddTransient<IMqttPacketSerializer, MqttPacketSerializer>();
@@ -42,7 +48,7 @@ namespace MQTTnet
         public static IServiceCollection AddMqttClient(this IServiceCollection services)
         {
             services.AddSingleton<MqttFactory>();
-            services.AddSingleton<IMqttCommunicationAdapterFactory, MqttFactory>();
+            services.AddSingleton<IMqttCommunicationAdapterFactory>(s => s.GetService<MqttFactory>());
 
             services.AddTransient<IMqttClient, MqttClient>();
             services.AddTransient<MqttClient>();

Frameworks/MQTTnet.UniversalWindows/Implementations/WebSocketStream.cs

@@ -3,6 +3,7 @@ using System.IO;
 using System.Net.WebSockets;
 using System.Threading;
 using System.Threading.Tasks;
+using MQTTnet.Core.Exceptions;
 
 namespace MQTTnet.Implementations
 {
@@ -27,13 +28,19 @@ namespace MQTTnet.Implementations
             {
                 var response = await _webSocket.ReceiveAsync(new ArraySegment<byte>(buffer, currentOffset, count), cancellationToken).ConfigureAwait(false);
                 currentOffset += response.Count;
-                
+                count -= response.Count;
+
                 if (response.MessageType == WebSocketMessageType.Close)
                 {
                     await _webSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, string.Empty, cancellationToken).ConfigureAwait(false);
                 }
             }
 
+            if (_webSocket.State == WebSocketState.Closed)
+            {
+                throw new MqttCommunicationException("connection closed");
+            }
+
             return currentOffset - offset;
         }
 

MQTTnet.Core/ManagedClient/IManagedMqttClientOptions.cs

@@ -10,5 +10,7 @@ namespace MQTTnet.Core.ManagedClient
         TimeSpan AutoReconnectDelay { get; }
 
         IManagedMqttClientStorage Storage { get; }
+
+        Func<IManagedMqttClientOptions, string> PasswordProvider { get; }
     }
 }

MQTTnet.Core/ManagedClient/ManagedMqttClient.cs

@@ -277,6 +277,7 @@ namespace MQTTnet.Core.ManagedClient
 
             try
             {
+                _options.PasswordProvider?.Invoke(_options);
                 await _mqttClient.ConnectAsync(_options.ClientOptions).ConfigureAwait(false);
                 return ReconnectionResult.Reconnected;
             }

MQTTnet.Core/ManagedClient/ManagedMqttClientOptions.cs

@@ -10,5 +10,8 @@ namespace MQTTnet.Core.ManagedClient
         public TimeSpan AutoReconnectDelay { get; set; } = TimeSpan.FromSeconds(5);
 
         public IManagedMqttClientStorage Storage { get; set; }
+
+        public Func<IManagedMqttClientOptions, string> PasswordProvider { get; set; }
+
     }
 }

MQTTnet.Core/Server/MqttServer.cs

@@ -9,7 +9,7 @@ using System.Linq;
 
 namespace MQTTnet.Core.Server
 {
-    public sealed class MqttServer : IMqttServer
+    public class MqttServer : IMqttServer
     {
         private readonly ILogger<MqttServer> _logger;
         private readonly MqttClientSessionsManager _clientSessionsManager;

MQTTnet.sln

@@ -33,6 +33,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MQTTnet.TestApp.NetCore", "
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MQTTnet.TestApp.AspNetCore2", "Tests\MQTTnet.TestApp.AspNetCore2\MQTTnet.TestApp.AspNetCore2.csproj", "{C6FF8AEA-0855-41EC-A1F3-AC262225BAB9}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MQTTnet.AspnetCore", "Frameworks\MQTTnet.AspnetCore\MQTTnet.AspnetCore.csproj", "{F10C4060-F7EE-4A83-919F-FF723E72F94A}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -163,6 +165,22 @@ Global
 		{C6FF8AEA-0855-41EC-A1F3-AC262225BAB9}.Release|x64.Build.0 = Release|Any CPU
 		{C6FF8AEA-0855-41EC-A1F3-AC262225BAB9}.Release|x86.ActiveCfg = Release|Any CPU
 		{C6FF8AEA-0855-41EC-A1F3-AC262225BAB9}.Release|x86.Build.0 = Release|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Debug|ARM.ActiveCfg = Debug|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Debug|ARM.Build.0 = Debug|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Debug|x64.Build.0 = Debug|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Debug|x86.Build.0 = Debug|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Release|ARM.ActiveCfg = Release|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Release|ARM.Build.0 = Release|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Release|x64.ActiveCfg = Release|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Release|x64.Build.0 = Release|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Release|x86.ActiveCfg = Release|Any CPU
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -174,6 +192,7 @@ Global
 		{3587E506-55A2-4EB3-99C7-DC01E42D25D2} = {32A630A7-2598-41D7-B625-204CD906F5FB}
 		{3D283AAD-AAA8-4339-8394-52F80B6304DB} = {9248C2E1-B9D6-40BF-81EC-86004D7765B4}
 		{C6FF8AEA-0855-41EC-A1F3-AC262225BAB9} = {9248C2E1-B9D6-40BF-81EC-86004D7765B4}
+		{F10C4060-F7EE-4A83-919F-FF723E72F94A} = {32A630A7-2598-41D7-B625-204CD906F5FB}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {07536672-5CBC-4BE3-ACE0-708A431A7894}

Tests/MQTTnet.TestApp.AspNetCore2/MQTTnet.TestApp.AspNetCore2.csproj

@@ -2,10 +2,11 @@
 
   <PropertyGroup>
     <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TypeScriptToolsVersion>2.3</TypeScriptToolsVersion>
   </PropertyGroup>
 
   <ItemGroup>
-    <Folder Include="wwwroot\" />
+    <Content Remove="wwwroot\app\app.ts" />
   </ItemGroup>
 
   <ItemGroup>
@@ -13,8 +14,11 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\..\Frameworks\MQTTnet.Netstandard\MQTTnet.NetStandard.csproj" />
-    <ProjectReference Include="..\..\MQTTnet.Core\MQTTnet.Core.csproj" />
+    <ProjectReference Include="..\..\Frameworks\MQTTnet.AspnetCore\MQTTnet.AspnetCore.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <TypeScriptCompile Include="wwwroot\app\app.ts" />
   </ItemGroup>
 
 </Project>

Tests/MQTTnet.TestApp.AspNetCore2/Startup.cs

@@ -1,11 +1,13 @@
-using System.Collections.Generic;
-using System.Diagnostics;
+using System;
+using System.IO;
+using System.Threading.Tasks;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.FileProviders;
 using Microsoft.Extensions.Logging;
-using MQTTnet.Core.Adapter;
-using MQTTnet.Core.Server;
+using MQTTnet.AspnetCore;
+using MQTTnet.Core;
 
 namespace MQTTnet.TestApp.AspNetCore2
 {
@@ -13,35 +15,44 @@ namespace MQTTnet.TestApp.AspNetCore2
     {
         public void ConfigureServices(IServiceCollection services)
         {
-            services.AddMqttServer();
-            services.AddSingleton<MqttWebSocketServerAdapter>();
-            services.AddSingleton<IMqttServerAdapter, MqttWebSocketServerAdapter>();
+            services.AddHostedMqttServer();
         }
 
-        public async void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
+        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
         {
-            loggerFactory.AddConsole(LogLevel.Debug);
-            loggerFactory.AddDebug();
-
-            var adapter = app.ApplicationServices.GetService<MqttWebSocketServerAdapter>();
-            var mqttServer = app.ApplicationServices.GetService<IMqttServer>();
-            await mqttServer.StartAsync();
-            
-            app.UseWebSockets();
-            app.Use(async (context, next) =>
+            app.UseMqttEndpoint();
+            app.UseMqttServer(async server =>
             {
-                if (context.WebSockets.IsWebSocketRequest)
+                var msg = new MqttApplicationMessageBuilder()
+                    .WithPayload("Mqtt is awesome")
+                    .WithTopic("message");
+
+                while (true)
                 {
-                    using (var webSocket = await context.WebSockets.AcceptWebSocketAsync())
-                    {
-                        await adapter.AcceptWebSocketAsync(webSocket);
-                    }
+                    server.Publish(msg.Build());
+                    await Task.Delay(TimeSpan.FromSeconds(2));
+                    msg.WithPayload("Mqtt is still awesome at " + DateTime.Now);
                 }
-                else
+            });
+
+            app.Use((context, next) =>
+            {
+                if (context.Request.Path == "/")
                 {
-                    await next();
+                    context.Request.Path = "/Index.html";
                 }
+
+                return next();
             });
+
+            app.UseStaticFiles();
+
+
+            app.UseStaticFiles( new StaticFileOptions()
+            {
+                RequestPath = "/node_modules",
+                FileProvider = new PhysicalFileProvider( Path.Combine(env.ContentRootPath, "node_modules" ) )
+            } );
         }
     }
 }

Tests/MQTTnet.TestApp.AspNetCore2/package.json

@@ -0,0 +1,14 @@
+{
+  "version": "1.0.0",
+  "name": "mqtt.test",
+  "private": true,
+  "devDependencies": {
+  },
+
+  "dependencies": {
+    "mqtt": "2.13.1",
+    "@types/node": "8.0.46",
+    "systemjs": "0.20.19",
+    "typescript": "2.3.4"
+  }
+}

Tests/MQTTnet.TestApp.AspNetCore2/tsconfig.json

@@ -0,0 +1,12 @@
+{
+  "compilerOptions": {
+    "noImplicitAny": false,
+    "noEmitOnError": true,
+    "removeComments": false,
+    "sourceMap": true,
+    "target": "es5"
+  },
+  "exclude": [
+    "node_modules"
+  ]
+}

Tests/MQTTnet.TestApp.AspNetCore2/wwwroot/Index.html

@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="utf-8" />
+    <title>MQTT test</title>
+</head>
+<body>
+<script src="node_modules/systemjs/dist/system.js"></script>
+<script>
+    System.config({
+        packages: {
+            '': {
+                defaultExtension: 'js'
+            }
+        },
+        map: {
+            mqtt: 'node_modules/mqtt/dist/mqtt.min'
+        }
+    });
+    System.import('app/app');
+</script>
+    
+<div>
+    <p id="state"></p>
+    <input id="topic" placeholder="topic" />
+    <input id="msg" placeholder="msg" />
+    <button id="publish">send</button>
+</div>
+
+<div>
+    <ul id="msgs" ></ul>
+</div>
+
+</body>
+</html>

Tests/MQTTnet.TestApp.AspNetCore2/wwwroot/app/app.ts

@@ -0,0 +1,56 @@
+import { connect } from "mqtt";
+
+var client = connect('ws://' + location.host + '/mqtt',
+    {
+        clientId: "client1",
+    });
+
+window.onbeforeunload = () => {
+    client.end();
+};
+
+var publishButton = document.getElementById("publish");
+var topicInput = <HTMLInputElement>document.getElementById("topic");
+var msgInput = <HTMLInputElement>document.getElementById("msg");
+var stateParagraph = document.getElementById("state");
+var msgsList = <HTMLUListElement>document.getElementById("msgs");
+
+publishButton.onclick = click => {
+    var topic = topicInput.value;
+    var msg = msgInput.value;
+    client.publish(topic, msg);
+};
+
+client.on('connect', () => {
+    client.subscribe('#', { qos: 0 }, (err, granted) => {
+        console.log(err);   
+    });
+    client.publish('presence', 'Hello mqtt');
+
+    stateParagraph.innerText = "connected";
+});
+
+client.on("error", e => {
+    showMsg("error: " + e.message);
+});
+
+client.on("reconnect", () => {
+    stateParagraph.innerText = "reconnecting";
+});
+
+client.on('message', (topic, message) => {
+    showMsg(topic + ": " + message.toString());
+});
+
+function showMsg(msg: string) {
+    //console.log(msg);
+
+    var node = document.createElement("LI");
+    node.appendChild(document.createTextNode(msg));
+
+    msgsList.appendChild(node);
+
+    if (msgsList.childElementCount > 20) {
+        msgsList.removeChild(msgsList.childNodes[0]);
+    }
+}

Tests/MQTTnet.TestApp.NetCore/ManagedClientTest.cs

@@ -7,6 +7,9 @@ using MQTTnet.Core.Packets;
 using MQTTnet.Core.Protocol;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
+using System.IO;
+using Newtonsoft.Json;
+using System.Collections.Generic;
 
 namespace MQTTnet.TestApp.NetCore
 {
@@ -22,18 +25,32 @@ namespace MQTTnet.TestApp.NetCore
             services.GetService<ILoggerFactory>()
                 .AddConsole();
 
+            ClientRetainedMessageHandler ms = new ClientRetainedMessageHandler();
+            Func<ManagedMqttClientOptions, string> func = delegate (ManagedMqttClientOptions managedMqttClientOptions)
+            {
+                return "password";
+            };
 
             var options = new ManagedMqttClientOptions
             {
                 ClientOptions = new MqttClientTcpOptions
                 {
                     Server = "broker.hivemq.com",
-                    ClientId = "MQTTnetManagedClientTest"
+                    ClientId = "MQTTnetManagedClientTest",
+                    Password = "pippo",
                 },
 
-                AutoReconnectDelay = TimeSpan.FromSeconds(1)
+                AutoReconnectDelay = TimeSpan.FromSeconds(1),
+                Storage = ms,      
+                PasswordProvider = o =>
+                {
+                    //o.ClientOptions.Password = GetPassword();
+                    return o.ClientOptions.Password;
+                }
             };
 
+            
+
             try
             {
                 var managedClient = services.GetRequiredService<ManagedMqttClient>();
@@ -59,5 +76,39 @@ namespace MQTTnet.TestApp.NetCore
                 Console.WriteLine(e);
             }
         }
+
+
+        public static string GetPassword()
+        {
+            return "password";
+        }
+
+
+        public class ClientRetainedMessageHandler : IManagedMqttClientStorage
+        {
+            private const string Filename = @"RetainedMessages.json";
+
+            public Task SaveQueuedMessagesAsync(IList<MqttApplicationMessage> messages)
+            {
+                File.WriteAllText(Filename, JsonConvert.SerializeObject(messages));
+                return Task.FromResult(0);
+            }
+
+            public Task<IList<MqttApplicationMessage>> LoadQueuedMessagesAsync()
+            {
+                IList<MqttApplicationMessage> retainedMessages;
+                if (File.Exists(Filename))
+                {
+                    var json = File.ReadAllText(Filename);
+                    retainedMessages = JsonConvert.DeserializeObject<List<MqttApplicationMessage>>(json);
+                }
+                else
+                {
+                    retainedMessages = new List<MqttApplicationMessage>();
+                }
+
+                return Task.FromResult(retainedMessages);
+            }
+        }
     }
 }