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/Net/Internal/SystemHttpResponse.cs

@@ -0,0 +1,97 @@
+using System;
+using System.IO;
+using System.Net;
+using System.Text;
+
+namespace EmbedIO.Net.Internal
+{
+    /// <summary>
+    /// Represents a wrapper for HttpListenerContext.Response.
+    /// </summary>
+    /// <seealso cref="IHttpResponse" />
+    public class SystemHttpResponse : IHttpResponse
+    {
+        private readonly System.Net.HttpListenerResponse _response;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SystemHttpResponse"/> class.
+        /// </summary>
+        /// <param name="context">The context.</param>
+        public SystemHttpResponse(System.Net.HttpListenerContext context)
+        {
+            _response = context.Response;
+            Cookies = new SystemCookieCollection(_response.Cookies);
+        }
+
+        /// <inheritdoc />
+        public WebHeaderCollection Headers => _response.Headers;
+
+        /// <inheritdoc />
+        public int StatusCode
+        {
+            get => _response.StatusCode;
+            set => _response.StatusCode = value;
+        }
+
+        /// <inheritdoc />
+        public long ContentLength64
+        {
+            get => _response.ContentLength64;
+            set => _response.ContentLength64 = value;
+        }
+
+        /// <inheritdoc />
+        public string ContentType
+        {
+            get => _response.ContentType;
+            set => _response.ContentType = value;
+        }
+
+        /// <inheritdoc />
+        public Stream OutputStream => _response.OutputStream;
+
+        /// <inheritdoc />
+        public ICookieCollection Cookies { get; }
+
+        /// <inheritdoc />
+        public Encoding? ContentEncoding
+        {
+            get => _response.ContentEncoding;
+            set => _response.ContentEncoding = value;
+        }
+        
+        /// <inheritdoc />
+        public bool KeepAlive
+        {
+            get => _response.KeepAlive;
+            set => _response.KeepAlive = value;
+        }
+
+        /// <inheritdoc />
+        public bool SendChunked
+        {
+            get => _response.SendChunked;
+            set => _response.SendChunked = value;
+        }
+
+        /// <inheritdoc />
+        public Version ProtocolVersion
+        {
+            get => _response.ProtocolVersion;
+            set => _response.ProtocolVersion = value;
+        }
+
+        /// <inheritdoc />
+        public string StatusDescription 
+        {
+            get => _response.StatusDescription;
+            set => _response.StatusDescription = value;
+        }
+
+        /// <inheritdoc />
+        public void SetCookie(Cookie cookie) => _response.SetCookie(cookie);
+
+        /// <inheritdoc />
+        public void Close() => _response.OutputStream?.Dispose();
+    }
+}