在封装的头部注释如下信息即可。
httpServer.all('*', function (req, res, next) { res.header("Access-Control-Allow-Origin", "*"); res.header("Access-Control-Allow-Headers", "X-Requested-With"); res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS"); res.header("X-Powered-By", ' 3.2.1') // res.header("Content-Type", "application/json;charset=utf-8"); ---将该行注释即可 next(); })