curl --location --request GET 'http://pcapi-xiaotuxian-front-devtest.itheima.net/goods/stock/300248016'
{
"code": "1",
"msg": "操作成功",
"result": {
"nowPrice": 199,
"oldPrice": null,
"stock": 4912,
"discount": null,
"isEffective": true
}
}