服务端通过多媒体下载图片时

https://api.weixin.qq.com/cgi-bin/media/get?access_token=***&media_id=***

media_id是通过手机获取，非开发者工具

{"errcode":40007,"errmsg":"invalid media_id hint: [PHwYRA0302d105] rid: 63b7f956-1db91841-635cc383"}