v4.0.0 (#1357)

Source/MQTTnet.AspnetCore/ApplicationBuilderExtensions.cs

@@ -0,0 +1,52 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.Extensions.DependencyInjection;
+using MQTTnet.Server;
+
+namespace MQTTnet.AspNetCore
+{
+    public static class ApplicationBuilderExtensions
+    {
+        [Obsolete("This class is obsolete and will be removed in a future version. The recommended alternative is to use MapMqtt inside Microsoft.AspNetCore.Builder.UseEndpoints(...).")]
+        public static IApplicationBuilder UseMqttEndpoint(this IApplicationBuilder app, string path = "/mqtt")
+        {
+            app.UseWebSockets();
+            app.Use(async (context, next) =>
+            {
+                if (!context.WebSockets.IsWebSocketRequest || context.Request.Path != path)
+                {
+                    await next();
+                    return;
+                }
+
+                string subProtocol = null;
+
+                if (context.Request.Headers.TryGetValue("Sec-WebSocket-Protocol", out var requestedSubProtocolValues))
+                {
+                    subProtocol = MqttSubProtocolSelector.SelectSubProtocol(requestedSubProtocolValues);
+                }
+
+                var adapter = app.ApplicationServices.GetRequiredService<MqttWebSocketServerAdapter>();
+                using (var webSocket = await context.WebSockets.AcceptWebSocketAsync(subProtocol).ConfigureAwait(false))
+                {
+                    await adapter.RunWebSocketConnectionAsync(webSocket, context);
+                }
+            });
+
+            return app;
+        }
+
+        public static IApplicationBuilder UseMqttServer(this IApplicationBuilder app, Action<MqttServer> configure)
+        {
+            var server = app.ApplicationServices.GetRequiredService<MqttServer>();
+
+            configure(server);
+
+            return app;
+        }
+    }
+}