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/Files/IFileProvider.cs

@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading;
+
+namespace EmbedIO.Files
+{
+    /// <summary>
+    /// Represents an object that can provide files and/or directories to be served by a <see cref="FileModule"/>.
+    /// </summary>
+    public interface IFileProvider
+    {
+        /// <summary>
+        /// <para>Occurs when a file or directory provided by this instance is modified or removed.</para>
+        /// <para>The event's parameter is the provider-specific path of the resource that changed.</para>
+        /// </summary>
+        event Action<string> ResourceChanged;
+
+        /// <summary>
+        /// Gets a value indicating whether the files and directories provided by this instance
+        /// will never change.
+        /// </summary>
+        bool IsImmutable { get; }
+
+        /// <summary>
+        /// Signals a file provider that the web server is starting.
+        /// </summary>
+        /// <param name="cancellationToken">A <see cref="CancellationToken"/> used to stop the web server.</param>
+        void Start(CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Maps a URL path to a provider-specific path.
+        /// </summary>
+        /// <param name="urlPath">The URL path.</param>
+        /// <param name="mimeTypeProvider">An <see cref="IMimeTypeProvider"/> interface to use
+        /// for determining the MIME type of a file.</param>
+        /// <returns>A provider-specific path identifying a file or directory,
+        /// or <see langword="null"/> if this instance cannot provide a resource associated
+        /// to <paramref name="urlPath"/>.</returns>
+        MappedResourceInfo? MapUrlPath(string urlPath, IMimeTypeProvider mimeTypeProvider);
+
+        /// <summary>
+        /// Opens a file for reading.
+        /// </summary>
+        /// <param name="path">The provider-specific path for the file.</param>
+        /// <returns>
+        /// <para>A readable <see cref="Stream"/> of the file's contents.</para>
+        /// </returns>
+        Stream OpenFile(string path);
+
+        /// <summary>
+        /// Returns an enumeration of the entries of a directory.
+        /// </summary>
+        /// <param name="path">The provider-specific path for the directory.</param>
+        /// <param name="mimeTypeProvider">An <see cref="IMimeTypeProvider"/> interface to use
+        /// for determining the MIME type of files.</param>
+        /// <returns>An enumeration of <see cref="MappedResourceInfo"/> objects identifying the entries
+        /// in the directory identified by <paramref name="path"/>.</returns>
+        IEnumerable<MappedResourceInfo> GetDirectoryEntries(string path, IMimeTypeProvider mimeTypeProvider);
+    }
+}