$ curl -X OPTIONS -H 'Access-Control-Request-Method: GET' -H 'Origin: https://console.bce.baidu.com' https://bj.bcebos.com/bce-cdn/ecom/esl/2-1-6/esl.js -i
HTTP/1.1 200 OK
Date: Mon, 18 Sep 2017 07:39:25 GMT
Content-Type: text/plain; charset=utf-8
Content-Length: 0
Connection: keep-alive
Access-Control-Allow-Credentials: true