Response Header
RFC7231
サーバーの状態や対象リソースの情報
Age
,
Cache-Control
,
Expires
Location
Etag
,
Last-Modified
Content-Encoding
,
Content-Type
,
Content-Length
Retry-After
Server
security
X-XSS-Protection
X-Frame-Options
X-Content-Type-Options
Content-Security-Policy
Strict-Transport-Security