Got at least one data fetching method working; turns out, we can't use a patched LogicStack to get the data

Vendor/EmbedIO-3.5.2/WebApi/WebApiModule.cs

@@ -0,0 +1,94 @@
+using System;
+using System.Threading.Tasks;
+using EmbedIO.Utilities;
+
+namespace EmbedIO.WebApi
+{
+    /// <summary>
+    /// <para>A module using class methods as handlers.</para>
+    /// <para>Public instance methods that match the WebServerModule.ResponseHandler signature, and have the WebApi handler attribute
+    /// will be used to respond to web server requests.</para>
+    /// </summary>
+    public class WebApiModule : WebApiModuleBase
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="WebApiModule" /> class,
+        /// using the default response serializer.
+        /// </summary>
+        /// <param name="baseRoute">The base URL path served by this module.</param>
+        /// <seealso cref="IWebModule.BaseRoute" />
+        /// <seealso cref="Validate.UrlPath" />
+        public WebApiModule(string baseRoute)
+            : base(baseRoute)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="WebApiModule" /> class,
+        /// using the specified response serializer.
+        /// </summary>
+        /// <param name="baseRoute">The base URL path served by this module.</param>
+        /// <param name="serializer">A <see cref="ResponseSerializerCallback"/> used to serialize
+        /// the result of controller methods returning <see langword="object"/>
+        /// or <see cref="Task{TResult}">Task&lt;object&gt;</see>.</param>
+        /// <exception cref="ArgumentNullException"><paramref name="serializer"/> is <see langword="null"/>.</exception>
+        /// <seealso cref="IWebModule.BaseRoute" />
+        /// <seealso cref="Validate.UrlPath" />
+        public WebApiModule(string baseRoute, ResponseSerializerCallback serializer)
+            : base(baseRoute, serializer)
+        {
+        }
+
+        /// <summary>
+        /// <para>Registers a controller type using a constructor.</para>
+        /// <para>See <see cref="WebApiModuleBase.RegisterControllerType{TController}()"/>
+        /// for further information.</para>
+        /// </summary>
+        /// <typeparam name="TController">The type of the controller.</typeparam>
+        /// <seealso cref="RegisterController{TController}(Func{TController})"/>
+        /// <seealso cref="RegisterController(Type)"/>
+        /// <seealso cref="WebApiModuleBase.RegisterControllerType{TController}()"/>
+        public void RegisterController<TController>()
+            where TController : WebApiController, new()
+            => RegisterControllerType(typeof(TController));
+
+        /// <summary>
+        /// <para>Registers a controller type using a factory method.</para>
+        /// <para>See <see cref="WebApiModuleBase.RegisterControllerType{TController}(Func{TController})"/>
+        /// for further information.</para>
+        /// </summary>
+        /// <typeparam name="TController">The type of the controller.</typeparam>
+        /// <param name="factory">The factory method used to construct instances of <typeparamref name="TController"/>.</param>
+        /// <seealso cref="RegisterController{TController}()"/>
+        /// <seealso cref="RegisterController(Type,Func{WebApiController})"/>
+        /// <seealso cref="WebApiModuleBase.RegisterControllerType{TController}(Func{TController})"/>
+        public void RegisterController<TController>(Func<TController> factory)
+            where TController : WebApiController
+            => RegisterControllerType(typeof(TController), factory);
+
+        /// <summary>
+        /// <para>Registers a controller type using a constructor.</para>
+        /// <para>See <see cref="WebApiModuleBase.RegisterControllerType(Type)"/>
+        /// for further information.</para>
+        /// </summary>
+        /// <param name="controllerType">The type of the controller.</param>
+        /// <seealso cref="RegisterController(Type,Func{WebApiController})"/>
+        /// <seealso cref="RegisterController{TController}()"/>
+        /// <seealso cref="WebApiModuleBase.RegisterControllerType(Type)"/>
+        public void RegisterController(Type controllerType)
+            => RegisterControllerType(controllerType);
+
+        /// <summary>
+        /// <para>Registers a controller type using a factory method.</para>
+        /// <para>See <see cref="WebApiModuleBase.RegisterControllerType(Type,Func{WebApiController})"/>
+        /// for further information.</para>
+        /// </summary>
+        /// <param name="controllerType">The type of the controller.</param>
+        /// <param name="factory">The factory method used to construct instances of <paramref name="controllerType"/>.</param>
+        /// <seealso cref="RegisterController(Type)"/>
+        /// <seealso cref="RegisterController{TController}(Func{TController})"/>
+        /// <seealso cref="WebApiModuleBase.RegisterControllerType(Type,Func{WebApiController})"/>
+        public void RegisterController(Type controllerType, Func<WebApiController> factory)
+            => RegisterControllerType(controllerType, factory);
+    }
+}