MQTTnet.Server: Add HTTP API for publishing of messages.

Source/MQTTnet.Server/Controllers/ClientsController.cs

@@ -13,7 +13,7 @@ namespace MQTTnet.Server.Controllers
 {
     [Authorize]
     [ApiController]
-    public class ClientsController : ControllerBase
+    public class ClientsController : Controller
     {
         private readonly MqttServerService _mqttServerService;
 

Source/MQTTnet.Server/Controllers/MessagesController.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using MQTTnet.Server.Mqtt;
+
+namespace MQTTnet.Server.Controllers
+{
+    [Authorize]
+    [ApiController]
+    public class MessagesController : Controller
+    {
+        private readonly MqttServerService _mqttServerService;
+
+        public MessagesController(MqttServerService mqttServerService)
+        {
+            _mqttServerService = mqttServerService ?? throw new ArgumentNullException(nameof(mqttServerService));
+        }
+
+        [Route("api/v1/messages")]
+        [HttpPost]
+        public async Task<ActionResult> PostMessage(MqttApplicationMessage message)
+        {
+            await _mqttServerService.PublishAsync(message);
+            return Ok();
+        }
+
+        [Route("api/v1/messages/{*topic}")]
+        [HttpPost]
+        public Task<ActionResult> PostMessage(string topic, string payload)
+        {
+            var message = new MqttApplicationMessageBuilder()
+                .WithTopic(topic)
+                .WithPayload(payload)
+                .Build();
+
+            return PostMessage(message);
+        }
+    }
+}

Source/MQTTnet.Server/Controllers/RetainedApplicationMessagesController.cs

@@ -12,7 +12,7 @@ namespace MQTTnet.Server.Controllers
 {
     [Authorize]
     [ApiController]
-    public class RetainedApplicationMessagesController : ControllerBase
+    public class RetainedApplicationMessagesController : Controller
     {
         private readonly MqttServerService _mqttServerService;
 

Source/MQTTnet.Server/Controllers/SessionsController.cs

@@ -13,7 +13,7 @@ namespace MQTTnet.Server.Controllers
 {
     [Authorize]
     [ApiController]
-    public class SessionsController : ControllerBase
+    public class SessionsController : Controller
     {
         private readonly MqttServerService _mqttServerService;