source: TFP-WebServer/MapRendering/src/ModApi.cs@ 467

using JetBrains.Annotations;
using Webserver;
using Webserver.UrlHandlers;

namespace MapRendering {
        [UsedImplicitly]
        public class ModApi : IModApi {
                private const string mapTilesBaseUrl = "/map/";
                
                public void InitMod (Mod _modInstance) {
                        ModEvents.GameStartDone.RegisterHandler (GameStartDone);

                        Web.ServerInitialized += _web => {
                                if (!MapRenderer.Enabled) {
                                        return;
                                }

                                _web.RegisterPathHandler (mapTilesBaseUrl, new StaticHandler (
                                        $"{GameIO.GetSaveGameDir ()}/map",
                                        MapRenderer.GetTileCache (),
                                        false,
                                        "web.map")
                                );

                                _web.OpenApiHelpers.RegisterCustomSpec (GetType ().Assembly, "MapTileHandler", mapTilesBaseUrl);
                        };
                }

                private void GameStartDone () {
                        if (!MapRenderer.Enabled) {
                                return;
                        }

                        ModEvents.GameShutdown.RegisterHandler (GameShutdown);
                        ModEvents.CalcChunkColorsDone.RegisterHandler (CalcChunkColorsDone);
                }

                private void GameShutdown () {
                        MapRenderer.Shutdown ();
                }

                private void CalcChunkColorsDone (Chunk _chunk) {
                        MapRenderer.RenderSingleChunk (_chunk);
                }
        }
}