HTTPヘッダ情報チェック
| HTTP/1.1 200 OK | |
| Date | Thu, 18 Dec 2025 12:50:50 GMT |
| Server | Apache/2.4.37 (Rocky Linux) |
| Last-Modified | Wed, 08 Jun 2022 19:12:45 GMT |
| ETag | "1d-5e0f47d824cf1" |
| Accept-Ranges | bytes |
| Content-Length | 29 |
| Connection | close |
| Content-Type | text/html; charset=UTF-8 |