HTTPヘッダ情報チェック
| HTTP/1.1 200 OK | |
| Server | nginx-reuseport/1.21.1 |
| Date | Fri, 03 May 2024 08:15:39 GMT |
| Content-Type | text/html |
| Content-Length | 36777 |
| Connection | keep-alive |
| Keep-Alive | timeout=30 |
| Vary | Accept-Encoding |
| Last-Modified | Thu, 04 May 2023 09:24:17 GMT |
| ETag | "8fa9-5fadabc9f93ee" |
| Accept-Ranges | bytes |