const app = express()
// 跨域设置
app.all('*', function (req, res, next) {
res.header("Access-Control-Allow-Credentials", true)
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")
next()
})
