HTTPヘッダ情報チェック
| HTTP/1.1 200 OK | |
| Server | nginx |
| Date | Fri, 27 Sep 2024 23:19:50 GMT |
| Content-Type | text/html; charset=utf-8 |
| Content-Length | 2568 |
| Connection | keep-alive |
| Vary | Accept-Encoding |
| Last-Modified | Wed, 10 Jan 2024 15:24:50 GMT |
| ETag | "a08-60e99082fd888" |
| Accept-Ranges | bytes |
| Vary | Accept-Encoding |