Responses to POST requests are only cacheable when they include explicit freshness information[1], which is not the case with the linked test page. [1]: http:/

Responses to POST requests are only cacheable when they include explicit freshness information[1], which is not the case with the linked test page. [1]: http://tools.ietf.org/html/rfc7231#section-4.3.3 http://tools.ietf.org/html/rfc7231#section-4.3.3