vibe

backend/static.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// spaHandler serves the built frontend from dir, falling back to index.html
+// for any path that isn't an actual file so client-side routes (e.g. a list's
+// /lion-fancy-sharpness URL) resolve correctly on a hard refresh.
+func spaHandler(dir string) http.Handler {
+	fs := http.FileServer(http.Dir(dir))
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		cleanPath := filepath.Clean(r.URL.Path)
+
+		if strings.HasPrefix(cleanPath, "/assets/") {
+			w.Header().Set("Cache-Control", "public, max-age=31536000, immutable")
+		} else {
+			w.Header().Set("Cache-Control", "no-cache")
+		}
+
+		if info, err := os.Stat(filepath.Join(dir, cleanPath)); err == nil && !info.IsDir() {
+			fs.ServeHTTP(w, r)
+			return
+		}
+		http.ServeFile(w, r, filepath.Join(dir, "index.html"))
+	})
+}