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/HttpConnection.InputState.cs

@@ -0,0 +1,11 @@
+namespace EmbedIO.Net.Internal
+{
+    partial class HttpConnection
+    {
+        private enum InputState
+        {
+            RequestLine,
+            Headers,
+        }
+    }
+}