只是 Set-Cookie 有用
```➜ ~ curl --insecure -I "
https://kyfw.12306.cn/otn/dynamicJs/ljibqau"
HTTP/1.1 200 OK
Date: Fri, 24 Feb 2017 09:38:44 GMT
Server: Apache-Coyote/1.1
X-Powered-By: Servlet 2.5; JBoss-5.0/JBossWeb-2.1
Set-Cookie: JSESSIONID=0A02F042FC88C1561568DA95BCCDFCF3D6401B2D6B; Path=/otn
ct: c2_66
Pragma: No-cache
Cache-Control: no-cache
Expires: Thu, 01 Jan 1970 00:00:00 GMT
Content-Type: text/javascript;charset=UTF-8
Content-Length: 0
Set-Cookie: BIGipServerotn=1123025418.64545.0000; path=/
X-Via: 1.1 gangwangtong26:5 (Cdn Cache Server V2.0)
Connection: keep-alive
X-Cdn-Src-Port: 40582
```