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Intepret Cache Headers #11

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hawx opened this issue Jan 5, 2016 · 0 comments

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hawx commented Jan 5, 2016 •

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When requesting a feed the feed may specify how often to fetch the feed. But it may also return Expires or ETag headers:

If an Expires header is returned, then if that date is further in the future than the next fetch time it should be used instead.
If an ETag header is returned send an If-None-Match header with the given value on the next fetch.

And, always send a If-Modified-Since with the last fetch time.

Ignore Cache-Control for now, it will probably be more hassle than it's worth.

Tasks

Always send If-Modified-Since with the last fetch time.
If an Expires header is returned then set the next fetch time to the maximum of it or the usual value.
If an ETag header is returned send an If-None-Match header with the next fetch.

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