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/WebServerOptionsBaseExtensions.cs

@@ -0,0 +1,27 @@
+using System;
+
+namespace EmbedIO
+{
+    /// <summary>
+    /// Provides extension methods for classes derived from <see cref="WebServerOptionsBase"/>.
+    /// </summary>
+    public static class WebServerOptionsBaseExtensions
+    {
+        /// <summary>
+        /// Adds a URL prefix.
+        /// </summary>
+        /// <typeparam name="TOptions">The type of the object on which this method is called.</typeparam>
+        /// <param name="this">The object on which this method is called.</param>
+        /// <param name="value">If <see langword="true"/>, enable support for compressed request bodies.</param>
+        /// <returns><paramref name="this"/> with its <see cref="WebServerOptionsBase.SupportCompressedRequests">SupportCompressedRequests</see>
+        /// property set to <paramref name="value"/>.</returns>
+        /// <exception cref="NullReferenceException"><paramref name="this"/> is <see langword="null"/>.</exception>
+        /// <exception cref="InvalidOperationException">The configuration of <paramref name="this"/> is locked.</exception>
+        public static TOptions WithSupportCompressedRequests<TOptions>(this TOptions @this, bool value)
+            where TOptions : WebServerOptionsBase
+        {
+            @this.SupportCompressedRequests = value;
+            return @this;
+        }
+    }
+}