IE Firefox 浏览器刷新和强制刷新发送的 HTTP Request Header
Firefox:
刷新 F5
Cache-Control: max-age=0
强制刷新 Ctrl+F5
Pragma: no-cache
Cache-Control: no-cache
IE:
刷新 F5
If-Modified-Since: Sun, 21 Nov 2004 14:35:21 GMT
If-None-Match: "14f598-916-a64a7c40"
强制刷新 Ctrl+F5
Cache-Control: no-cache
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