HTTP Caching

7 days ago

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HTTP caching stores responses for reuse, reducing server load and improving response times.
Two main types of caches: private (client-specific) and shared (among users).
Private caches store personalized responses, while shared caches include proxy and managed caches.
Heuristic caching allows responses to be stored even without explicit Cache-Control headers.
Fresh and stale states of cached responses are determined by their age relative to max-age.
Validation mechanisms (If-Modified-Since, If-None-Match) allow stale responses to be refreshed.
Cache busting involves changing URLs for static resources to enable long-term caching.
Main resources (like HTML) typically use no-cache to ensure they are always up-to-date.
Managed caches (CDNs, service workers) offer more control, like purging caches on updates.

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