Are Your Cache-Control Directives Doing What They Are Supposed to Do?
Cache-Control directives are pretty straightforward to understand. They’re easy to use as well if you assume that all the caches between your end user and application correctly implement the spec. Unfortunately, as with any spec, you can’t make that assumption. You need to be aware of any spec misinterpretations in the implementation of the caches that you’re using, and properly account for them. Learn How to Get Cache-Control Right
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