Fred is a software jack of all trades, having worked over the last 24 years at every stage of the SDLC and has authored [two books](https://www.amazon.co.uk/Fred-Heath/e/B08F3Q1H1M).
Hey Andrei, it's too long to properly describe in a reply but in a nutshell: if we use custom headers we would need to specify these in the Vary HTTP header, so that proxy caches would know where to find the version number, so that they can compose their cache keys. However, content negotiation using the Vary header is notoriously difficult and often leads to cache fragmentation, which is why it's best avoided. bizcoder.com/the-insanity-of-the-v...
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Hey Andrei, it's too long to properly describe in a reply but in a nutshell: if we use custom headers we would need to specify these in the
VaryHTTP header, so that proxy caches would know where to find the version number, so that they can compose their cache keys. However, content negotiation using the Vary header is notoriously difficult and often leads to cache fragmentation, which is why it's best avoided. bizcoder.com/the-insanity-of-the-v...