第一步：获取 component_access_token

post https://api.weixin.qq.com/cgi-bin/component/api_component_token

{ "component_appid":"xxx",
 "component_appsecret":"xxx",   
 "component_verify_ticket":"xxx"

参考接口文档：https://developers.weixin.qq.com/doc/oplatform/Third-party_Platforms/2.0/api/ThirdParty/token/component_access_token.html

第二步:获取 pre_auth_code

post https://api.weixin.qq.com/cgi-bin/component/api_create_preauthcode?component_access_token=xxx

##  body 如下：
{
  "component_appid": "xxx" 
}

参考接口文档：https://developers.weixin.qq.com/doc/oplatform/openApi/OpenApiDoc/ticket-token/getPreAuthCode.html

第三步：获取 auth_code

拼接如下链接，通过<a>标签点击跳转授权，之后微信会回调 redirect_url?auth_code=xxx&expires_in=xxx

https://mp.weixin.qq.com/cgi-bin/componentloginpage?component_appid=1&pre_auth_code=2&redirect_uri=3&auth_type=4

参考接口文档：https://developers.weixin.qq.com/doc/oplatform/Third-party_Platforms/2.0/api/Before_Develop/Authorization_Process_Technical_Description.html

第四步：获取refresh_token

POST https://api.weixin.qq.com/cgi-bin/component/api_query_auth?component_access_token=82_Srjel5bo1_4uGdwhjwfW1cvjNKGrqz3LWasv5X-ash8ERLLJ6dkJK2F8sR7Tb-DCf8E5iZDHtLAsVsjt9ReEI8a7UT9Fs6I9GzIMoz1nI8Vs0HVXbxyyT6TT_TkTTWjAJACCF

# body 如下：
{
"component_appid":"appid_value" ,
"authorization_code": "auth_code_value"
}

参考接口文档：https://developers.weixin.qq.com/doc/oplatform/Third-party_Platforms/2.0/api/ThirdParty/token/authorization_info.html

第五步：获取 authorizer_access_token

POST https://api.weixin.qq.com/cgi-bin/component/api_query_auth?component_access_token=COMPONENT_ACCESS_TOKEN

# body
{
  "component_appid": "appid_value",
  "authorizer_appid": "auth_appid_value",
  "authorizer_refresh_token": "refresh_token_value"
}

参考接口文档：https://developers.weixin.qq.com/doc/oplatform/Third-party_Platforms/2.0/api/ThirdParty/token/api_authorizer_token.html

第六步：查看/添加生效的业务域名

查看和添加调用同一个接口，传入不同的 body

POST https://api.weixin.qq.com/wxa/setwebviewdomain?access_token=ACCESS_TOKEN 

# 查看已生效的业务域名的 body 写法
{"action": "get"} 

# 添加业务域名的 body 写法
{
  "action": "add",
  "webviewdomain": ["https://aaa.com", "https://pe.bbb.com"]
}

参考接口文档：https://developers.weixin.qq.com/doc/oplatform/openApi/OpenApiDoc/miniprogram-management/domain-management/modifyJumpDomain.html