跨域请求异常：The ‘Acess-Control-Allow-Origin’ header contains multiple values ‘*, *”. but only one is allowed
1. 问题 在浏览器中进行跨域请求一个接口时报错如下： Access to XMLHttoRequest at \'https://xxx.lzw.me/abc/getToken from origin \"http://localhost:3001 has been blocked by CORS policy: Response to preflight request doesn\'t pass
