浏览器缓存控制

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2018/10/29 15:04
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Most responses return an ETag header. Many responses also return a Last-Modified header. You can use the values of these headers to make subsequent requests to those resources using the If-None-Match and If-Modified-Since headers, respectively. If the resource has not changed, the server will return a 304 Not Modified.

下图来自github网站api接口文档

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