Fix CORS and POST handler

internal/server/um_local.go

@@ -56,6 +56,9 @@ func (manager *localManager) registerMux() *gmux.Router {
 	r.HandleFunc("/admin/users/{UID}", manager.getUserInfoHlr).Methods("GET")
 	r.HandleFunc("/admin/users/{UID}", manager.writeUserInfoHlr).Methods("POST")
 	r.HandleFunc("/admin/users/{UID}", manager.deleteUserHlr).Methods("DELETE")
+	r.Methods("OPTIONS").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Access-Control-Allow-Methods", "GET,POST,DELETE,OPTIONS")
+	})
 	r.Use(corsMiddleware)
 	return r
 }

internal/server/um_local_hlr.go

@@ -96,7 +96,7 @@ func (manager *localManager) writeUserInfoHlr(w http.ResponseWriter, r *http.Req
 		return
 	}
 
-	jsonUinfo := gmux.Vars(r)["UserInfo"]
+	jsonUinfo := r.FormValue("UserInfo")
 	if jsonUinfo == "" {
 		http.Error(w, "UserInfo cannot be empty", http.StatusBadRequest)
 		return
@@ -112,7 +112,7 @@ func (manager *localManager) writeUserInfoHlr(w http.ResponseWriter, r *http.Req
 	}
 
 	err = manager.db.Update(func(tx *bolt.Tx) error {
-		bucket, err := tx.CreateBucket(uinfo.UID)
+		bucket, err := tx.CreateBucketIfNotExists(uinfo.UID)
 		if err != nil {
 			return err
 		}