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Is it possible to fetch old entries from RSS feeds?


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Hi. I am interested in how does Google Reader fetch old entries of a RSS feed? For example, when I subscribe Neowin.net, Google Reader can show me very old entries from Neowin.net. How does Google Reader fetch old entries, and is my main question is: Is there any way to do it besides caching?

Google good at fetching data and index them, so I guess Google can cache data from Neowin. Once people subscribe Neowin RSS feed in Google Reader, old entries and be retrived from Google's cache. But what if Google didn't cache a website and someone subscribed it in Google Reader?

Does specifications of RSS/ Atom specified how should old entries be fetched from server?

And, if any, could someone suggest me a RSS feed cache?

Thanks! :)

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You cannot fetch what the server does not provide.

GR does what it does by storing its own copy of entries so that they can be accessed long after they have been removed from that feed (and even long after that RSS feed is gone). If you ever try to add a feed that has never been added to GR before, you will see that only the most recent entries are available.

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You cannot fetch what the server does not provide.

GR does what it does by storing its own copy of entries so that they can be accessed long after they have been removed from that feed (and even long after that RSS feed is gone). If you ever try to add a feed that has never been added to GR before, you will see that only the most recent entries are available.

Oooh, I thought there are some APIs to fetch old entries.

Thank you! :rolleyes:

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