在我們的3G版網(wǎng)站的項(xiàng)目中使用了html5 application cache，將大部分圖片資源、js、css等靜態(tài)資源放在manifest文件中。

沒(méi)想到上線第一天就遇到了嚴(yán)重問(wèn)題：application cache會(huì)默認(rèn)緩存當(dāng)前頁(yè)面?。?！就算我們有如下設(shè)置：


也就是說(shuō)，對(duì)于所有的動(dòng)態(tài)頁(yè)面，application cache會(huì)緩存起來(lái)，用戶怎么刷新都是老的！

而且手機(jī)瀏覽器還很難清除掉，也不支持js清除！

花了一個(gè)上午，嘗試了很多辦法，查了很多資料，都沒(méi)能清除掉客戶端的緩存。一上午被用戶投訴慘了。

最后還是萬(wàn)能的stackoverflow救了我：

Do not use appcache unless it is REALLY 100% EXACTLY WHAT YOU WANT TO DO
Even if it IS 100% EXACTLY WHAT YOU WANT TO DO, *DO NOT* use appcache until you are 100% CERTAIN that you are not going to make a single change to that page (or any file that it links to) for a LONG time.
Delete the manifest file from the server -- if the browser can't find the manifest file, then it will clear its cache... ...this will also turn caching off for everyone.
Don't turn it on again until it's 100% CORRECT
Dealing with appcache is miserable, often.
解決辦法很簡(jiǎn)單，在服務(wù)器端刪除掉manifest文件，并且慎用application cache

當(dāng)然，也有辦法是用application cache，同時(shí)能繞過(guò)自動(dòng)緩存當(dāng)前頁(yè)面的問(wèn)題。那就是用iframe

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