Forum - View topicANN caching attributes
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Dolda2000
Posts: 10 Location: Täby, Sweden |
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I recently installed Squid on my local network to cache HTTP requests. One of the things I was hoping for was that repetitive requests to ANN (I usually go back and forth quite a bit between the same set of pages when browsing the encyclopedia) would be sped up by not having to go to the real server for every request, but I was disappointed to discover that the PHP scripts on ANN don't set any caching attributes, so they cannot be cached.
If at all possible, couldn't you support the Last-Modified or If-Modified-Since headers? After all, it would probably decrease your used bandwidth quite a bit as well, thanks to other third parties caching. |
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Dan42
Chief Encyclopedist
 Posts: 3793 Location: Montreal |
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1. We need to place different ads on every page, so caching basically works against us. We'd need to switch to a javascript or iframe-based advertising scheme to be able to support caching like you want. Furthermore, each page is customized for the logged in user so caching is of limited use, i.e. we'd only be able to support caching for anonymous visitors.
2. If-Modified-Since is *very* difficult to implement in dynamic pages because it requires to take into account every variable that goes into the creation of the page in order to know when was the last modification. It's *far* easier to just generate the page every time. 3. There is no such thing as "caching attributes". There are only no-caching attributes. Unless the server specifically forbids caching, proxies should be able to cache the results (although I'm not sure what strategy they could use without the Last-Modified header). That being said, I just checked and I was suprised to find that the articles are being displayed with "Cache-Control: no-cache". I'll look into removing that. |
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