cocos creator http post 请求失败，大神帮忙看看

我的代码如下：

浏览器报错：
start_on.js:69 OPTIONS http://127.0.0.1:9888/ 0 ()
oncilck @ start_on.js:69
emit @ CCComponentEventHandler.js:144
emitEvents @ CCComponentEventHandler.js:111
_onTouchEnded @ CCButton.js:516
111.EventListeners.invoke @ event-listeners.js:48
_doDispatchEvent @ event-target.js:70
112.proto.dispatchEvent @ event-target.js:403
_touchEndHandler @ CCNode.js:200
_onTouchEventCallback @ CCEventManager.js:506
_dispatchEventToListeners @ CCEventManager.js:630
_dispatchTouchEvent @ CCEventManager.js:552
dispatchEvent @ CCEventManager.js:1059
handleTouchesEnd @ CCInputManager.js:172
_mouseEventsOnElement @ CCInputManager.js:463
(anonymous) @ CCInputManager.js:491

code报错;

Failed to load resource: net::ERR_EMPTY_RESPONSE [http://127.0.0.1:9888/]

然后服务器我用 Postman试过没有什么问题