私有化企业微信中打开应用，里面再打开嵌入的第三方页面，这里进行登录。oauth2地址:https://open.weixin.qq.com/connect/oauth2/authorize?appid=xxx&agentid=xx&redirect_uri=http%3A%2F%2F127.0.0.1%3A8200%2Fxx%2Fapi%2Fv1%2Fxxx%2Fxxx%2Fxxxx&response_type=code&scope=snsapi_base&state=STATE8ae0ac9e78b1485ca3a8376bad3eff7e#wechat_redirect