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- The correct minimum set of headers that works across all mentioned clients (and proxies): Cache-Control: no-cache, no-store, must-revalidate. Pragma: no-cache. Expires: 0. The Cache-Control is per the HTTP 1.1 spec for clients and proxies (and implicitly required by some clients next to Expires ).
Code sample
<IfModule mod_headers.c>Header set Cache-Control "no-cache, no-store, must-revalidate"Header set Pragma "no-cache"Header set Expires 0</IfModule>Explore further
Prevent unnecessary network requests with the HTTP Cache