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/IHttpMessage.cs

@@ -0,0 +1,26 @@
+using System;
+
+namespace EmbedIO
+{
+    /// <summary>
+    /// Represents a HTTP request or response.
+    /// </summary>
+    public interface IHttpMessage
+    {
+        /// <summary>
+        /// Gets the cookies.
+        /// </summary>
+        /// <value>
+        /// The cookies.
+        /// </value>
+        ICookieCollection Cookies { get; }
+
+        /// <summary>
+        /// Gets or sets the protocol version.
+        /// </summary>
+        /// <value>
+        /// The protocol version.
+        /// </value>
+        Version ProtocolVersion { get; }
+    }
+}