Fix page creation

main.go

@@ -86,7 +86,15 @@ func (h *handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 
 	info, err := os.Stat(fsPath)
 	if err != nil {
-		if os.IsNotExist(err) && strings.HasSuffix(r.URL.Path, "/") {
+		if os.IsNotExist(err) {
+			// Non-existent path: redirect GETs to the canonical slash form so
+			// the browser URL is consistent, then serve an empty folder page.
+			// POSTs must not be redirected — the form action has no trailing
+			// slash (path.Clean strips it) and the content would be lost.
+			if !strings.HasSuffix(r.URL.Path, "/") && r.Method != http.MethodPost {
+				http.Redirect(w, r, r.URL.Path+"/", http.StatusMovedPermanently)
+				return
+			}
 			h.serveDir(w, r, urlPath, fsPath)
 			return
 		}