HTTPヘッダ情報チェック
| HTTP/1.1 404 Not Found | |
| Content-Type | text/html; charset=UTF-8 |
| Date | Sat, 13 Dec 2025 07:47:08 GMT |
| Expires | Sat, 13 Dec 2025 07:47:08 GMT |
| Cache-Control | private, max-age=0 |
| X-Content-Type-Options | nosniff |
| X-Frame-Options | SAMEORIGIN |
| Content-Security-Policy | frame-ancestors 'self' |
| X-XSS-Protection | 1; mode=block |
| Server | GSE |
| Accept-Ranges | none |
| Vary | Accept-Encoding |
| Transfer-Encoding | chunked |