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/WebModuleContainerExtensions-Cors.cs

@@ -0,0 +1,53 @@
+using System;
+using EmbedIO.Cors;
+using EmbedIO.Utilities;
+using Swan;
+
+namespace EmbedIO
+{
+    partial class WebModuleContainerExtensions
+    {
+        /// <summary>
+        /// Creates an instance of <see cref="CorsModule"/> and adds it to a module container.
+        /// </summary>
+        /// <typeparam name="TContainer">The type of the module container.</typeparam>
+        /// <param name="this">The <typeparamref name="TContainer"/> on which this method is called.</param>
+        /// <param name="baseRoute">The base route of the module.</param>
+        /// <param name="origins">The valid origins. Default is <c>"*"</c>, meaning all origins.</param>
+        /// <param name="headers">The valid headers. Default is <c>"*"</c>, meaning all headers.</param>
+        /// <param name="methods">The valid method. Default is <c>"*"</c>, meaning all methods.</param>
+        /// <returns><paramref name="this"/> with a <see cref="CorsModule"/> added.</returns>
+        /// <exception cref="NullReferenceException"><paramref name="this"/> is <see langword="null"/>.</exception>
+        /// <seealso cref="CorsModule"/>
+        public static TContainer WithCors<TContainer>(
+            this TContainer @this,
+            string baseRoute,
+            string origins,
+            string headers,
+            string methods)
+            where TContainer : class, IWebModuleContainer
+        {
+            @this.Modules.Add(new CorsModule(baseRoute, origins, headers, methods));
+            return @this;
+        }
+
+        /// <summary>
+        /// Creates an instance of <see cref="CorsModule"/> and adds it to a module container.
+        /// </summary>
+        /// <typeparam name="TContainer">The type of the module container.</typeparam>
+        /// <param name="this">The <typeparamref name="TContainer"/> on which this method is called.</param>
+        /// <param name="origins">The valid origins. Default is <c>"*"</c>, meaning all origins.</param>
+        /// <param name="headers">The valid headers. Default is <c>"*"</c>, meaning all headers.</param>
+        /// <param name="methods">The valid method. Default is <c>"*"</c>, meaning all methods.</param>
+        /// <returns><paramref name="this"/> with a <see cref="CorsModule"/> added.</returns>
+        /// <exception cref="NullReferenceException"><paramref name="this"/> is <see langword="null"/>.</exception>
+        /// <seealso cref="CorsModule"/>
+        public static TContainer WithCors<TContainer>(
+            this TContainer @this,
+            string origins = CorsModule.All,
+            string headers = CorsModule.All,
+            string methods = CorsModule.All)
+            where TContainer : class, IWebModuleContainer
+            => WithCors(@this, UrlPath.Root, origins, headers, methods);
+    }
+}