server: replace go-bindata with stdlib embed.FS

Makefile

@@ -24,18 +24,9 @@ dist: \
 	_dist/contented-$(VERSION)-src.zip
 
 clean:
-	if [ -f ./staticResources.go ] ; then rm ./staticResources.go ; fi
 	if [ -d ./build ] ; then rm -r ./build ; fi
 	if [ -f ./contented ] ; then rm ./contented ; fi
 
-#
-# Generated files
-#
-
-staticResources.go: static/ static/*
-	go-bindata -o staticResources.go -prefix static -pkg contented static
-	
-
 #
 # Release artefacts
 #

Server.go

@@ -1,8 +1,9 @@
 package contented
 
 import (
-	"bytes"
+	"embed"
 	"encoding/json"
+	"io/fs"
 	"log"
 	"net/http"
 	"os"
@@ -14,6 +15,9 @@ import (
 	bolt "go.etcd.io/bbolt"
 )
 
+//go:embed static
+var staticAssets embed.FS
+
 var SERVER_HEADER string = `contented/0.0.0-dev`
 
 const DEFAULT_MAX_CONCURRENT_THUMBS = 16
@@ -49,6 +53,7 @@ type Server struct {
 	startTime      time.Time
 	thumbnailSem   chan struct{}
 	metadataBucket []byte
+	staticDir      fs.FS // interface
 }
 
 func NewServer(opts *ServerOptions) (*Server, error) {
@@ -63,6 +68,8 @@ func NewServer(opts *ServerOptions) (*Server, error) {
 		log.Printf("Allowing %d concurrent thumbnails", s.opts.MaxConcurrentThumbs)
 	}
 
+	s.staticDir, _ = fs.Sub(staticAssets, `static`) // can't fail
+
 	// "fill" the thumbnailer semaphore
 	s.thumbnailSem = make(chan struct{}, s.opts.MaxConcurrentThumbs)
 	for i := 0; i < s.opts.MaxConcurrentThumbs; i += 1 {
@@ -157,11 +164,17 @@ func (this *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		// Blanket allow (headers already set)
 		w.WriteHeader(200)
 
-	} else if r.Method == "GET" && r.URL.Path == `/` && this.opts.EnableHomepage {
-		http.Redirect(w, r, `/index.html`, http.StatusFound)
+	} else if r.Method == "GET" {
 
-	} else if static, err := Asset(r.URL.Path[1:]); err == nil && r.Method == "GET" && (this.opts.EnableHomepage || r.URL.Path != `/index.html`) {
-		http.ServeContent(w, r, r.URL.Path[1:], this.startTime, bytes.NewReader(static))
+		// Conditionally block homepage access
+		if !this.opts.EnableHomepage && (r.URL.Path == `/index.html` || r.URL.Path == `/`) {
+			http.Error(w, "Not found", 404)
+			return
+		}
+
+		// Serve static html/css/js assets
+		// http.FileServer transparently redirects index.html->/ internally
+		http.FileServer(http.FS(this.staticDir)).ServeHTTP(w, r)
 
 	} else {
 		http.Error(w, "Not found", 404)