获取公众号Openid在微信H5、小程序WebView

第一步获取code

仅支持微信浏览器打开或者微信小程序web-view中打开
https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx8aa81c215be8a5b3&redirect_uri=http://www.superunion88.com&response_type=code&scope=snsapi_base&state=123#wechat_redirect

redirect_uri：公众号必须设置-网页授权回调

code换openId

https://api.weixin.qq.com/sns/oauth2/access_token?appid=xxx&secret=xxx&code=081X2o1w3IbAI13Xgq3w3kGvvG1X2o1s&grant_type=authorization_code

响应