1.先get获取微信公众号的access_token, appid和secret是公众号的

https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=&secret=

2.post请求公众号文章

https://api.weixin.qq.com/cgi-bin/material/batchget_material?access_token=

参数：        
data: {
  "type": 'news',
  "offset": 0,
  "count": 10
  }