Architecture change to modules started.

- Added module-interface (module.go).
- Rewritten main function, added Registry (main.go)

main.go

@@ -1,121 +1,83 @@
 package main
 
 import (
+	"context"
 	"log"
 	"net/http"
 	"os"
-	"strings"
-	"time"
-	"context"
 	"os/signal"
+	"sync"
 	"syscall"
+	"time"
 
 	"github.com/gorilla/mux"
-	"golang.org/x/time/rate"
 )
 
-func noListing(next http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
-		if strings.HasSuffix(req.URL.Path, "/") {
-			http.NotFound(w, req)
-			return
-		}
-		next.ServeHTTP(w, req)
-	})
-}
-
-func securityHeaders(next http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
-		w.Header().Set("X-Content-Type-Options", "nosniff")
-		w.Header().Set("X-Frame-Options", "DENY")
-		w.Header().Set("Referrer-Policy", "strict-origin-when-cross-origin")
-		next.ServeHTTP(w, req)
-	})
-}
-
-var webhookLimiter = rate.NewLimiter(rate.Every(10*time.Second), 1)
-
-func rateLimit(next http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
-		if !webhookLimiter.Allow() {
-			log.Println("webhook rate limit exceeded")
-			w.WriteHeader(http.StatusTooManyRequests)
-			return
-		}
-		next.ServeHTTP(w, req)
-	})
-}
-
-func wkdHeaders(next http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
-		w.Header().Set("Content-Type", "application/octet-stream")
-		w.Header().Set("Access-Control-Allow-Origin", "*")
-		next.ServeHTTP(w, req)
-	})
-}
-
-func healthHandler(w http.ResponseWriter, req *http.Request) {
-	w.WriteHeader(http.StatusOK)
-	w.Write([]byte("ok"))
-}
-
 func main() {
 	cfg := loadConfig()
 
-	if cfg.EnableWebhook {
-		cloneOrOpen(cfg)
+	modules := []Module {
+		// Module werden hier registriert, sobald sie existieren, zB.:
+		// &webserver.Module{},
+		// &keyserver.Module{},
+		// &webhook.Module{},
+		// &resourcemonitor.Module{},
 	}
 
-	contentFS	:= http.FileServer(http.Dir(cfg.ContentDir))
-	keysFS 		:= http.FileServer(http.Dir(cfg.KeysDir))
-
-
 	r := mux.NewRouter()
 	r.Use(securityHeaders)
 
-	
-	api := r.PathPrefix("/api/").Subrouter()
-	api.HandleFunc("/healthz", healthHandler).Methods("GET", "HEAD")
-
-	if cfg.EnableWebhook {
-		r.Handle("/webhook", rateLimit(webhookHandler(cfg))).Methods("POST")
+	var active []Module
+	for _, m := range modules {
+		log.Printf("module %s: disabled, skipping", m.Name())
+		continue
 	}
 
-	// Eigener Bereich für .well-known: kein Listing, WKD-Header
-	wkd := r.PathPrefix("/.well-known/").Subrouter()
-	wkd.Use(noListing)
-	wkd.Use(wkdHeaders)
-	wkd.PathPrefix("/").Handler(keysFS)
+	ctx, cancel := context.WithCancel(context.Background())
 
-	// Alles andere: normaler Fileserver, Listing erlaubt, hier kommt später zB /downloads/ rein
-	r.PathPrefix("/").Handler(contentFS)
+	var wg sync.WaitGroup
+	for :, m := range active {
+		wg.Add(1)
+		go func(m Module) {
+			defer wg.Done()
+			if err := m.Start(ctx, cfg); err != nil {
+				log.Printf("module %s: exited with error: %v" m.Name(), err)
+			}
+		}(m)
+	}
 
 	srv := &http.Server {
 		Addr:	":" + cfg.Port,
 		Handler: r,
 	}
 
-	// Server in eigener Goroutine starten, damit main() weiterlaufen kann
 	go func() {
-		log.Printf("Listening on :%s, content=%s keys=%s (webhook: %v)", cfg.Port, cfg.ContentDir, cfg.KeysDir, cfg.EnableWebhook)
+		log.Printf("Listening on :%s, cfg.Port)
 		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
 			log.Fatalf("server error: %v", err)
 		}
 	}()
 
-	// Auf SIGTERM/SIGINT warten
 	stop := make(chan os.Signal, 1)
-	signal.Notify(stop, syscall.SIGTERM, syscall.SIGINT)
+	signal.Notify(stop, syscall.SIGTERM, syscall.SIGINIT)
 	<-stop
 
-	log.Println("Shutdown signal received, draining connections...")
+	log.Pritln("Shutdown siganl received, draining connections...")
+	cancel() // signals all moduke Start() goroutines to stop via ctx
 
-	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
-	defer cancel()
+	shutdownCtx, shutdownCancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer shutdownCancel()
 
-	if err := srv.Shutdown(ctx); err != nil {
-		log.Printf("graceful shutdown failed: %v", err)
-	} else {
+	if err := srv.Shutdown(shutdownCtx); err != nil {
+		log.Printf("graceful shutdown failed %v", err)
+	}
+
+	for _, m := range active {
+		if err := srv.Shutdown(shutdownCtx); err != nil {
+			log.Printf("module %s: stop error: %v", m.Name(), err)
+		}
+	}
+
+	wg.Wait()
 	log.Println("Server shut down cleanly")
 }
-}

module.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/gorilla/mux"
+)
+
+// Module represents a self-contained feature of Varde.
+// Each module is independently enabled/disabled via config and
+// runs in the same process, sharing the HTTP router where relevant.
+type Module interface {
+	// Name returns a short, unique identifier used in logs and config.
+	Name()
+
+	// Enabled reports whether this module should be started
+	// based on the loaded configuration.
+	Enabled(cfg *Config) bool
+
+	// RegisterRoutes attaches this module's HTTP routes to the shared router, if any.
+	// Modules without HTTP routes should leave this empty.
+	RegisterRoutes(r *musx.Router, cfg *Config)
+
+	// Start runs any background work for this module (eg. periodic checks, repo cloning).
+	// Should block until ctx is cancelled, or return immediately if the module has no background work.
+	Start(ctx context.Context, cfg *Config) error
+
+	// Stop performs graceful cleanup. Called druing shutdown for every module that was successfully started.
+	Stop(ctx context.Context) error
+}
+
+// baseModule provides no-op defaults so modules only need to implement the methods relevant to them.
+type baseModule struct{}
+
+func (baseModule) RegisterRoutes(r *mux.Router, cfg *Config){}
+func (baseModule) Start(cxt context.Context, cfg *Config) error {return nil}
+
+var _ = http.MethodGet // placeholder import guard, remove once a module uses net/http directly here