在我們的3G版網站的項目中使用了html5 application cache,將大部分圖片資源、js、css等靜態資源放在manifest文件中。
沒想到上線第一天就遇到了嚴重問題:application cache會默認緩存當前頁面!!!就算我們有如下設置:
NETWORK:*
也就是說,對於所有的動態頁面,application cache會緩存起來,用戶怎么刷新都是老的!
而且手機瀏覽器還很難清除掉,也不支持js清除!
花了一個上午,嘗試了很多辦法,查了很多資料,都沒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.
解決辦法很簡單,在服務器端刪除掉manifest文件,並且慎用application cache
當然,也有辦法是用application cache,同時能繞過自動緩存當前頁面的問題。那就是用iframe:http://sofish.de/1449
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