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/Actions/ActionModule.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Threading.Tasks;
+using EmbedIO.Utilities;
+
+namespace EmbedIO.Actions
+{
+    /// <summary>
+    /// A module that passes requests to a callback.
+    /// </summary>
+    /// <seealso cref="WebModuleBase" />
+    public class ActionModule : WebModuleBase
+    {
+        private readonly HttpVerbs _verb;
+
+        private readonly RequestHandlerCallback _handler;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ActionModule" /> class.
+        /// </summary>
+        /// <param name="baseRoute">The base route.</param>
+        /// <param name="verb">The HTTP verb that will be served by this module.</param>
+        /// <param name="handler">The callback used to handle requests.</param>
+        /// <exception cref="ArgumentNullException"><paramref name="handler"/> is <see langword="null"/>.</exception>
+        /// <seealso cref="WebModuleBase(string)"/>
+        public ActionModule(string baseRoute, HttpVerbs verb, RequestHandlerCallback handler)
+            : base(baseRoute)
+        {
+            _verb = verb;
+            _handler = Validate.NotNull(nameof(handler), handler);
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ActionModule"/> class.
+        /// </summary>
+        /// <param name="handler">The handler.</param>
+        public ActionModule(RequestHandlerCallback handler)
+            : this("/", HttpVerbs.Any, handler)
+        {
+        }
+
+        /// <inheritdoc />
+        public override bool IsFinalHandler => false;
+
+        /// <inheritdoc />
+        protected override async Task OnRequestAsync(IHttpContext context)
+        {
+            if (_verb != HttpVerbs.Any && context.Request.HttpVerb != _verb)
+                return;
+
+            await _handler(context).ConfigureAwait(false);
+            context.SetHandled();
+        }
+    }
+}