What are CloudFlare's caching levels?

You can set CloudFlare’s CDN to cache static content according to these levels:

  • No Query String / Basic: Only delivers resources from cache when there is no query string.
  • Ignore Query String / Simple: Delivers the same resource to everyone independent of the query string (Note: The Ignore Query String setting only applies to static file extensions. This setting will remove the query string when generating the cache key, so that a request for "style.css?something" will be normalised to just "style.css" when serving from the cache.).
  • Standard / Aggressive: Delivers a different resource each time the query string changes.

Note: CloudFlare, by default, does not cache HTML content. You need to write a Page Rule to cache static HTML content.

Examples:

 

 

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