I'm using Amazon S3 to serve static assets for my website. I want to have browsers cache these assets for as long as possible. What meta-data headers should I include with my assets
Generally one year is advised as a standard max value. See RFC 2616:
To mark a response as "never expires," an origin server sends an Expires date approximately one year from the time the response is sent. HTTP/1.1 servers SHOULD NOT send Expires dates more than one year in the future.
Although that applies to the older
expires standard, it makes sense to apply to
cache-control too in the absence of any explicit standards guidance. It's as long as you should generally need anyway and picking any arbitrarily longer value could break some user-agents. So: