http 1.0 backwards compatibility: expires vs cache-control:max age

mozilla / connect-cachify

Express connect middleware to provide easy frontend caching for Node.js

Mozilla Public License 2.0

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http 1.0 backwards compatibility: expires vs cache-control:max age #29

Open jaredhirsch opened 11 years ago

jaredhirsch commented 11 years ago

Again, been reading RFC 2616 all day, might be missing an implementation detail, but: it seems like Expires headers are backwards compatible with HTTP 1.0, while max-age headers are not. (I don't have good examples of relevance except that, IIRC, Squid doesn't support 1.1, only 1.0.) Not a huge thing, but then, why not fix it?

Any disadvantage to switching to Expires?

shane-tomlinson commented 11 years ago

If I remember right, @lloyd and I did a bunch of testing with IE8 and how it acted when combined with ETags. The problem is, I don't know if I remember right.