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On Dec 1, 2013 6:42 PM, "Joe Hourcle" <[log in to unmask]> wrote: > So that you don't screw up web proxies, you have to specify the 'Vary' header to tell which parameters you consider significant so that it knows what is or isn't cacheable. I believe that if a Vary isn't specified, and the content is not marked as non cachable, a cache must assume Vary:*, but I might be misremembering. > (who has been managing web servers since HTTP/0.9, and gets annoyed when I have to explain to our security folks each year why I don't reject pre-HTTP/1.1 requests or follow the rest of the CIS benchmark recommendations that cause our web services to fail horribly) Old school represent (0.9 could out perform 1.0 if the request headers were more than 1 MTU or the first line was sent in a separate packet with nagle enabled). [Accept was a major cause of header bloat].