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/WebServerExtensions-ExceptionHandliers.cs

@@ -0,0 +1,47 @@
+using System;
+
+namespace EmbedIO
+{
+    partial class WebServerExtensions
+    {
+        /// <summary>
+        /// Sets the HTTP exception handler on an <see cref="IWebServer" />.
+        /// </summary>
+        /// <typeparam name="TWebServer">The type of the web server.</typeparam>
+        /// <param name="this">The <typeparamref name="TWebServer" /> on which this method is called.</param>
+        /// <param name="handler">The HTTP exception handler.</param>
+        /// <returns><paramref name="this"/> with the <see cref="IWebServer.OnHttpException">OnHttpException</see>
+        /// property set to <paramref name="handler" />.</returns>
+        /// <exception cref="NullReferenceException"><paramref name="this" /> is <see langword="null" />.</exception>
+        /// <exception cref="InvalidOperationException">The web server has already been started.</exception>
+        /// <exception cref="ArgumentNullException"><paramref name="handler" /> is <see langwrd="null" />.</exception>
+        /// <seealso cref="IWebServer.OnHttpException" />
+        /// <seealso cref="HttpExceptionHandler" />
+        public static TWebServer HandleHttpException<TWebServer>(this TWebServer @this, HttpExceptionHandlerCallback handler)
+            where TWebServer : IWebServer
+        {
+            @this.OnHttpException = handler;
+            return @this;
+        }
+
+        /// <summary>
+        /// Sets the unhandled exception handler on an <see cref="IWebServer" />.
+        /// </summary>
+        /// <typeparam name="TWebServer">The type of the web server.</typeparam>
+        /// <param name="this">The <typeparamref name="TWebServer" /> on which this method is called.</param>
+        /// <param name="handler">The unhandled exception handler.</param>
+        /// <returns><paramref name="this"/> with the <see cref="IWebServer.OnUnhandledException">OnUnhandledException</see>
+        /// property set to <paramref name="handler" />.</returns>
+        /// <exception cref="NullReferenceException"><paramref name="this" /> is <see langword="null" />.</exception>
+        /// <exception cref="InvalidOperationException">The web server has already been started.</exception>
+        /// <exception cref="ArgumentNullException"><paramref name="handler" /> is <see langwrd="null" />.</exception>
+        /// <seealso cref="IWebServer.OnUnhandledException" />
+        /// <seealso cref="ExceptionHandler" />
+        public static TWebServer HandleUnhandledException<TWebServer>(this TWebServer @this, ExceptionHandlerCallback handler)
+            where TWebServer : IWebServer
+        {
+            @this.OnUnhandledException = handler;
+            return @this;
+        }
+    }
+}