Content Negotiation

Accept Headers

Accept-Encoding and Content-Encoding

Vary

• url + specific http headers = cached resource

Not Match

406 Not acceptable

Reference

• https://developer.mozilla.org/en-US/docs/Web/HTTP/Content_negotiation
• https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Vary
• https://imququ.com/post/vary-header-in-http.html