Age HTTP Header - Original Server Response
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The Age header contains the time in seconds the object has been in a proxy cache.
Private Cache-Control Header
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The Cache-Control general-header field is used to specify directives for caching mechanisms in both requests and responses. Caching directives are unidirectional, meaning that a given directive in a request is not implying that the same directive is to be given in the response.
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HSTS - Browser HTTPS Only
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The HTTP Strict-Transport-Security response header (often abbreviated as HSTS) lets a web site tell browsers that it should only be accessed using HTTPS, instead of using HTTP for 31536000 seconds
X-Cache HTTP Header
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The resource was not in the website cache, and was pulled from the origin server like Varnish servers.
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