Split code in respective files.

Resource method name change.

Route list func

serve.go

@@ -0,0 +1,78 @@
+package mux
+
+import (
+	"context"
+	"errors"
+	"io"
+	"log"
+	"log/slog"
+	"net"
+	"net/http"
+	"os/signal"
+	"syscall"
+	"time"
+)
+
+type ServeCB func(srv *http.Server) error
+
+const (
+	shutdownDelay     = time.Second * 10
+	shutdownHardDelay = time.Second * 5
+	drainDelay        = time.Second
+)
+
+// Serve with graceful shutdown
+func (m *Mux) Serve(cb ServeCB) {
+	rootCtx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer stop()
+
+	// catch all options
+	// lets get it thorugh all middlewares
+	m.OPTIONS("/", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Length", "0")
+		if r.ContentLength != 0 {
+			// Read up to 4KB of OPTIONS body (as mentioned in the
+			// spec as being reserved for future use), but anything
+			// over that is considered a waste of server resources
+			// (or an attack) and we abort and close the connection,
+			// courtesy of MaxBytesReader's EOF behavior.
+			mb := http.MaxBytesReader(w, r.Body, 4<<10)
+			io.Copy(io.Discard, mb)
+		}
+	})
+
+	srvCtx, cancelSrvCtx := context.WithCancel(context.Background())
+	srv := &http.Server{
+		Handler: m,
+		BaseContext: func(_ net.Listener) context.Context {
+			return srvCtx
+		},
+	}
+
+	go func() {
+		if err := cb(srv); !errors.Is(err, http.ErrServerClosed) {
+			panic(err)
+		}
+	}()
+
+	// Wait for interrupt signal
+	<-rootCtx.Done()
+
+	stop()
+	m.IsShuttingDown.Store(true)
+	slog.Info("received interrupt singal, shutting down")
+	time.Sleep(drainDelay)
+	slog.Info("readiness check propagated, now waiting for ongoing requests to finish.")
+
+	shutdownCtx, cancel := context.WithTimeout(context.Background(), shutdownDelay)
+	defer cancel()
+
+	err := srv.Shutdown(shutdownCtx)
+	cancelSrvCtx()
+	if err != nil {
+		log.Println("failed to wait for ongoing requests to finish, waiting for forced cancellation")
+		time.Sleep(shutdownHardDelay)
+	}
+
+	slog.Info("seerver shut down gracefully")
+}