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by derekzhouzhen
1432 days ago
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If you need realtime update, then RSS is probably not the right tool. For polling, I currently do the following: * with `HTTP 304: not modified` result, I'll come back in 60 minutes
* if there is any update, I'll come back in 4 hours
* if there is no cache control header, such as etag or last-modified, I will poll every 12 hours. |
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