make .html suffix optional

Signed-off-by: Tobias Erbshäußer <tobias@tesoft.dev>

backend/main.go

@@ -6,6 +6,19 @@ import (
 	"os"
 )
 
+type HtmlDir struct {
+	dir http.Dir
+}
+
+func (dir HtmlDir) Open(name string) (http.File, error) {
+	file, err := dir.dir.Open(name)
+	if os.IsNotExist(err) {
+		file, err = dir.dir.Open(name + ".html")
+	}
+
+	return file, err
+}
+
 func main() {
 	port := os.Getenv("PORT")
 	if port == "" {
@@ -31,7 +44,7 @@ func main() {
 	apiHandler := &ApiHandler{db: db}
 
 	mux := http.NewServeMux()
-	mux.Handle("/", http.FileServer(http.Dir(frontendPath)))
+	mux.Handle("/", http.FileServer(HtmlDir{http.Dir(frontendPath)}))
 	mux.Handle("GET /api/blog", apiHandler.ProcessAuth(http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
 		apiHandler.ServeBlogGet(writer, request)
 	}), false))