April 2016
Intermediate to advanced
290 pages
5h 51m
English
Content preview from Mastering Symfony
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Key players in the HTTP cache header
Before diving into the Symfony application cache, let's familiarize ourselves with the elements that we need to handle in our cache strategies. To do so, open www.wikipedia.org in your browser, inspect any resource with 304 response code, and ponder on request/response headers in the Network tab:
Among the response elements, there are four cache headers that we are interested in the most, Expires and Cache-Control, which will be used for the expiration model, and Etag and Last-Modified, which will be used for the validation model.
Apart from these cache headers, we can have variations of the same cache (compressed/uncompressed) ...
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