OAuth2 认证流程

6: 携带code访问重定向地址

授权服务

资源服务器

第三方网站

11: 检验token

12: 返回资源

浏览器

https://open.weixin.qq.com/connect/qrconnect?appid=wx00dc77dadaf54f3b&redirect_uri=https%3A%2F%2Fwww.oschina.net%2Faction%2Fopenid%2Fafter_bind_wechat%3Fgoto%3Dhttps%3A%2F%2Fmy.oschina.net%2Fwwh%2Fblog%2F3094281%26from%3D&response_type=code&scope=snsapi_login&state=o45TaAVTG8UU7lJSUCxs#wechat_redirect

9: 返回一个access_token

7: 携带code换取access_token

10: 携带access_token访问资源