Funcitional

Client/WebUI/main.go

@@ -3,11 +3,16 @@ package main
 import (
 	"embed"
 	"flag"
+	"fmt"
+	"io/fs"
 	"log"
 	"net/http"
 )
 
-//go:embed static/index.html
+// version is set at build time via -ldflags "-X main.version=..."
+var version = "dev"
+
+//go:embed static
 var staticFiles embed.FS
 
 func main() {
@@ -22,25 +27,19 @@ func main() {
 	udpClient := NewUDPClient(*streamerAddr, *clientPort, hub)
 	go udpClient.Run()
 
-	// Serve the embedded index.html at /.
-	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.Path != "/" {
-			http.NotFound(w, r)
-			return
-		}
-		data, err := staticFiles.ReadFile("static/index.html")
-		if err != nil {
-			http.Error(w, "index.html not found", http.StatusInternalServerError)
-			return
-		}
-		w.Header().Set("Content-Type", "text/html; charset=utf-8")
-		w.Write(data)
+	// Serve the embedded static/ directory (index.html, style.css, app.js).
+	sub, err := fs.Sub(staticFiles, "static")
+	if err != nil {
+		log.Fatalf("static sub-fs: %v", err)
+	}
+	http.Handle("/", http.FileServer(http.FS(sub)))
+	http.HandleFunc("/ws", hub.HandleWebSocket)
+	http.HandleFunc("/version", func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprint(w, version)
 	})
 
-	http.HandleFunc("/ws", hub.HandleWebSocket)
-
-	log.Printf("WebUI listening on %s  (streamer=%s, local UDP port=%d)",
-		*listenAddr, *streamerAddr, *clientPort)
+	log.Printf("WebUI listening on %s  (streamer=%s, local UDP port=%d, version=%s)",
+		*listenAddr, *streamerAddr, *clientPort, version)
 	if err := http.ListenAndServe(*listenAddr, nil); err != nil {
 		log.Fatalf("http: %v", err)
 	}