egg-soket.io跨域
Access to XMLHttpRequest at 'http://127.0.0.1:7001/socket.io/?EIO=4&transport=polling&t=Nqi-mDi' from origin 'http://localhost:8080' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: It does not have HTTP ok status.

不知道这个egg-socket.io怎么设置，我http接口正常的，已经开启了egg-cors