Add anyhttp support (#17)

Reviewed-on: #17
Fixes #11

go.mod

@@ -3,7 +3,7 @@ module go.balki.me/collage-maker
 go 1.21
 
 require (
-	github.com/oliamb/cutter v0.2.2
+	go.balki.me/anyhttp v0.3.0
 	go.oneofone.dev/resize v1.0.1
 )
 

go.sum

@@ -1,6 +1,6 @@
-github.com/oliamb/cutter v0.2.2 h1:Lfwkya0HHNU1YLnGv2hTkzHfasrSMkgv4Dn+5rmlk3k=
-github.com/oliamb/cutter v0.2.2/go.mod h1:4BenG2/4GuRBDbVm/OPahDVqbrOemzpPiG5mi1iryBU=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+go.balki.me/anyhttp v0.3.0 h1:WtBQ0rnkg567sX/O4ij/+qBbdCIUt5VURSe718sITBY=
+go.balki.me/anyhttp v0.3.0/go.mod h1:JhfekOIjgVODoVqUCficjpIgmB3wwlB7jhN0eN2EZ/s=
 go.oneofone.dev/resize v1.0.1 h1:HjpVar/4pxMGrjO44ThaMX1Q5UOBw0KxzbxxRDZPQuA=
 go.oneofone.dev/resize v1.0.1/go.mod h1:zGFmn7q4EUZVlnDmxqf+b0mWpxsTt0MH2yx6ng8tpq0=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"context"
 	"crypto/rand"
 	"embed"
 	"encoding/json"
@@ -16,6 +17,8 @@ import (
 
 	"log/slog"
 
+	"go.balki.me/anyhttp"
+	"go.balki.me/anyhttp/idle"
 	"go.balki.me/collage-maker/collage"
 )
 
@@ -25,6 +28,7 @@ var (
 	localAssets    bool
 	collageNameGen *nameGen
 	imagesDirFs    fs.FS
+	listenAddr     string
 
 	// go:embed web/*
 	webFS embed.FS
@@ -34,6 +38,7 @@ func main() {
 	flag.StringVar(&imagesDir, "images-dir", "images", "Sets the images dir")
 	flag.StringVar(&collageDir, "collages-dir", "collages", "Sets the collages dir")
 	flag.BoolVar(&localAssets, "local-assets", false, "Serve local assets for testing")
+	flag.StringVar(&listenAddr, "addr", "127.0.0.1:8767", "Web listen address, see https://pkg.go.dev/go.balki.me/anyhttp#readme-address-syntax")
 
 	flag.Parse()
 
@@ -87,10 +92,25 @@ func main() {
 			w.WriteHeader(http.StatusInternalServerError)
 			return
 		}
-		w.Write([]byte(collageFile))
+		if _, err := w.Write([]byte(collageFile)); err != nil {
+			slog.Error("Failed to write collageFile", "error", err)
+		}
 	})
-	if err := http.ListenAndServe(":8767", nil); err != nil {
-		slog.Error("http ListenAndServe failed", "error", err)
+	addrType, server, done, err := anyhttp.Serve(listenAddr, idle.WrapHandler(nil))
+	if err != nil {
+		slog.Error("anyhttp Serve failed", "error", err)
+	}
+
+	if addrType == anyhttp.SystemdFD {
+		if err := idle.Wait(30 * time.Minute); err != nil {
+			slog.Error("Failed to wait for idler", "error", err)
+		}
+		ctx, _ := context.WithTimeout(context.Background(), 1*time.Minute) // Don't want any stuck connections
+		if err := server.Shutdown(ctx); err != nil {
+			slog.Error("http server Shutdown failed", "error", err)
+		}
+	} else {
+		<-done
 	}
 }