By dotCore
via ebaytechblog.com
Published: Aug 21 2012 / 09:31
The basic purpose of HTTP caching is to provide a mechanism for applications to scale better and perform faster. But HTTP caching is applicable only to idempotent requests, which makes a lot of sense; only idempotent and nullipotent requests yield the same result when run multiple times. In the HTTP world, this fact means that GET requests can be cached but POST requests cannot.
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