jpg转png

curl --request GET 'https://v2.xxapi.cn/api/jpgtopng?url=&return='

{
  "code": 200,
  "msg": "数据请求成功",
  "data": "https://cdn.xxhzm.cn/v2api/cache/tmp/99e2acd4f7ae4063345739b65da193b20f0849a1.png"
}