应用引擎urlfetch缓存清除 [英] app engine urlfetch cache clearing

问题描述

已经找到了这个

有没有一个命令可以清除所有的urlfetch缓存数据？ p> http://www.mail-archive.com/ [e-mail]/msg09869.html

这似乎通过网址的基础清除一个网址

解决方案

没有。缓存 - 无论是作为urlfetch的一部分还是其他地方 - 公开缓存页面。多个用户可能会尝试获取相同的页面，并获得相同的缓存结果。因此，清除缓存将清除它给每个人。

HTTP提供绕过缓存的标头，如您引用的链接所示。如果您需要避免检索缓存的结果，则应该使用这些。

Is there a command to do a one time clear of all urlfetch cached data?

Have found this

http://www.mail-archive.com/[e-mail]/msg09869.html

which seems to clear on a url by url basis

解决方案

No. Caches - whether as part of urlfetch or elsewhere - cache pages publicly. Multiple users may try to fetch the same page, and get the same cached result. Thus, clearing the cache would clear it for everyone.

HTTP provides headers for bypassing caching, as the link you referenced indicates. These are what you should use if you need to avoid retrieving cached results.

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