source: binary-improvements/MapRendering/API.cs

using System;
using System.IO;
using JetBrains.Annotations;
using Webserver.FileCache;
using Webserver.UrlHandlers;

namespace AllocsFixes.Web {
        [UsedImplicitly]
        public class API : IModApi {
                private static Mod modInstance;
                
                public void InitMod (Mod _modInstance) {
                        modInstance = _modInstance;

                        Webserver.Web.ServerInitialized += OnWebServerInitialized;
                }

                private static void OnWebServerInitialized (Webserver.Web _web) {
                        try {
                                const string legacyModUrl = "/legacymap";
                                const string legacyFilesFoldername = "webserver_legacy";
                                string legacyFilePath = $"{modInstance.Path}/{legacyFilesFoldername}";

                                if (!Directory.Exists (legacyFilePath)) {
                                        Log.Out ($"Legacy webmod feature not started (folder \"{legacyFilesFoldername}\" not found in Allocs_WebAndMapRendering mod folder)");
                                        return;
                                }

                                // TODO: Read from config
                                bool useStaticCache = false;

                                _web.RegisterPathHandler ($"{legacyModUrl}", new SimpleRedirectHandler ($"{legacyModUrl}/index.html"));
                                _web.RegisterPathHandler ($"{legacyModUrl}/", new StaticHandler (legacyFilePath, useStaticCache ? new SimpleCache () : new DirectAccess (), false));

                                int webPort = GamePrefs.GetInt (EnumUtils.Parse<EnumGamePrefs> (nameof(EnumGamePrefs.WebDashboardPort)));
                                Log.Out ($"Started legacy webmod feature on port {webPort}, local address {legacyModUrl}");
                        } catch (Exception e) {
                                Log.Out ($"Error in Web.ctor: {e}");
                        }
                }
        }
}