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/HttpException-Shortcuts.cs

@@ -0,0 +1,158 @@
+using System;
+using System.Net;
+
+namespace EmbedIO
+{
+    partial class HttpException
+    {
+        /// <summary>
+        /// Returns a new instance of <see cref="HttpException" /> that, when thrown,
+        /// will break the request handling control flow and send a <c>500 Internal Server Error</c>
+        /// response to the client.
+        /// </summary>
+        /// <param name="message">A message to include in the response.</param>
+        /// <param name="data">The data object to include in the response.</param>
+        /// <returns>
+        /// A newly-created <see cref="HttpException" />.
+        /// </returns>
+        public static HttpException InternalServerError(string? message = null, object? data = null)
+            => new HttpException(HttpStatusCode.InternalServerError, message, data);
+        
+        /// <summary>
+        /// Returns a new instance of <see cref="HttpException" /> that, when thrown,
+        /// will break the request handling control flow and send a <c>401 Unauthorized</c>
+        /// response to the client.
+        /// </summary>
+        /// <param name="message">A message to include in the response.</param>
+        /// <param name="data">The data object to include in the response.</param>
+        /// <returns>
+        /// A newly-created <see cref="HttpException" />.
+        /// </returns>
+        public static HttpException Unauthorized(string? message = null, object? data = null)
+            => new HttpException(HttpStatusCode.Unauthorized, message, data);
+
+        /// <summary>
+        /// Returns a new instance of <see cref="HttpException"/> that, when thrown,
+        /// will break the request handling control flow and send a <c>403 Forbidden</c>
+        /// response to the client.
+        /// </summary>
+        /// <param name="message">A message to include in the response.</param>
+        /// <param name="data">The data object to include in the response.</param>
+        /// <returns>A newly-created <see cref="HttpException"/>.</returns>
+        public static HttpException Forbidden(string? message = null, object? data = null)
+            => new HttpException(HttpStatusCode.Forbidden, message, data);
+
+        /// <summary>
+        /// Returns a new instance of <see cref="HttpException"/> that, when thrown,
+        /// will break the request handling control flow and send a <c>400 Bad Request</c>
+        /// response to the client.
+        /// </summary>
+        /// <param name="message">A message to include in the response.</param>
+        /// <param name="data">The data object to include in the response.</param>
+        /// <returns>A newly-created <see cref="HttpException"/>.</returns>
+        public static HttpException BadRequest(string? message = null, object? data = null)
+            => new HttpException(HttpStatusCode.BadRequest, message, data);
+
+        /// <summary>
+        /// Returns a new instance of <see cref="HttpException"/> that, when thrown,
+        /// will break the request handling control flow and send a <c>404 Not Found</c>
+        /// response to the client.
+        /// </summary>
+        /// <param name="message">A message to include in the response.</param>
+        /// <param name="data">The data object to include in the response.</param>
+        /// <returns>A newly-created <see cref="HttpException"/>.</returns>
+        public static HttpException NotFound(string? message = null, object? data = null)
+            => new HttpException(HttpStatusCode.NotFound, message, data);
+
+        /// <summary>
+        /// Returns a new instance of <see cref="HttpException"/> that, when thrown,
+        /// will break the request handling control flow and send a <c>405 Method Not Allowed</c>
+        /// response to the client.
+        /// </summary>
+        /// <param name="message">A message to include in the response.</param>
+        /// <param name="data">The data object to include in the response.</param>
+        /// <returns>A newly-created <see cref="HttpException"/>.</returns>
+        public static HttpException MethodNotAllowed(string? message = null, object? data = null)
+            => new HttpException(HttpStatusCode.MethodNotAllowed, message, data);
+
+        /// <summary>
+        /// Returns a new instance of <see cref="HttpNotAcceptableException"/> that, when thrown,
+        /// will break the request handling control flow and send a <c>406 Not Acceptable</c>
+        /// response to the client.
+        /// </summary>
+        /// <returns>A newly-created <see cref="HttpNotAcceptableException"/>.</returns>
+        /// <seealso cref="HttpNotAcceptableException()"/>
+        public static HttpNotAcceptableException NotAcceptable() => new HttpNotAcceptableException();
+
+        /// <summary>
+        /// <para>Returns a new instance of <see cref="HttpNotAcceptableException"/> that, when thrown,
+        /// will break the request handling control flow and send a <c>406 Not Acceptable</c>
+        /// response to the client.</para>
+        /// </summary>
+        /// <param name="vary">A value, or a comma-separated list of values, to set the response's <c>Vary</c> header to.</param>
+        /// <returns>A newly-created <see cref="HttpNotAcceptableException"/>.</returns>
+        /// <seealso cref="HttpNotAcceptableException(string)"/>
+        public static HttpNotAcceptableException NotAcceptable(string vary) => new HttpNotAcceptableException(vary);
+
+        /// <summary>
+        /// Returns a new instance of <see cref="HttpRangeNotSatisfiableException"/> that, when thrown,
+        /// will break the request handling control flow and send a <c>416 Range Not Satisfiable</c>
+        /// response to the client.
+        /// </summary>
+        /// <returns>A newly-created <see cref="HttpRangeNotSatisfiableException"/>.</returns>
+        /// <seealso cref="HttpRangeNotSatisfiableException()"/>
+        public static HttpRangeNotSatisfiableException RangeNotSatisfiable() => new HttpRangeNotSatisfiableException();
+
+        /// <summary>
+        /// Returns a new instance of <see cref="HttpRangeNotSatisfiableException"/> that, when thrown,
+        /// will break the request handling control flow and send a <c>416 Range Not Satisfiable</c>
+        /// response to the client.
+        /// </summary>
+        /// <param name="contentLength">The total length of the requested resource, expressed in bytes,
+        /// or <see langword="null"/> to omit the <c>Content-Range</c> header in the response.</param>
+        /// <returns>A newly-created <see cref="HttpRangeNotSatisfiableException"/>.</returns>
+        /// <seealso cref="HttpRangeNotSatisfiableException()"/>
+        public static HttpRangeNotSatisfiableException RangeNotSatisfiable(long? contentLength)
+            => new HttpRangeNotSatisfiableException(contentLength);
+
+        /// <summary>
+        /// Returns a new instance of <see cref="HttpRedirectException" /> that, when thrown,
+        /// will break the request handling control flow and redirect the client
+        /// to the specified location, using response status code 302.
+        /// </summary>
+        /// <param name="location">The redirection target.</param>
+        /// <returns>
+        /// A newly-created <see cref="HttpRedirectException" />.
+        /// </returns>
+        public static HttpRedirectException Redirect(string location)
+            => new HttpRedirectException(location);
+
+        /// <summary>
+        /// Returns a new instance of <see cref="HttpRedirectException" /> that, when thrown,
+        /// will break the request handling control flow and redirect the client
+        /// to the specified location, using the specified response status code.
+        /// </summary>
+        /// <param name="location">The redirection target.</param>
+        /// <param name="statusCode">The status code to set on the response, in the range from 300 to 399.</param>
+        /// <returns>
+        /// A newly-created <see cref="HttpRedirectException" />.
+        /// </returns>
+        /// <exception cref="ArgumentException"><paramref name="statusCode"/> is not in the 300-399 range.</exception>
+        public static HttpRedirectException Redirect(string location, int statusCode)
+            => new HttpRedirectException(location, statusCode);
+
+        /// <summary>
+        /// Returns a new instance of <see cref="HttpRedirectException" /> that, when thrown,
+        /// will break the request handling control flow and redirect the client
+        /// to the specified location, using the specified response status code.
+        /// </summary>
+        /// <param name="location">The redirection target.</param>
+        /// <param name="statusCode">One of the redirection status codes, to be set on the response.</param>
+        /// <returns>
+        /// A newly-created <see cref="HttpRedirectException" />.
+        /// </returns>
+        /// <exception cref="ArgumentException"><paramref name="statusCode"/> is not a redirection status code.</exception>
+        public static HttpRedirectException Redirect(string location, HttpStatusCode statusCode)
+            => new HttpRedirectException(location, statusCode);
+    }
+}