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The author:(作者)归海一刀
published in(发表于) 2014/3/16 2:52:58
ajax缓存解决123_[AJAX教程]

ajax缓存解决有1,2,3种办法：

1、加个随机数 ASP随机函数
xmlHttp.open("GET", "ajax.asp?now=" + new Date().getTime(), true);

2、在要异步获取的asp页面中写一段禁止缓存的代码：
Response.Buffer =True
Response.ExpiresAbsolute =Now() - 1
Response.Expires=0
Response.CacheControl="no-cache"

3、在ajax发送请求前加上xmlHTTP.setRequestHeader("If-Modified-Since","0");可以禁止缓存
xmlHTTP.open("get", URL, true);
xmlHTTP.onreadystatechange = callHTML;
xmlHTTP.setRequestHeader("If-Modified-Since","0");
xmlHTTP.send();

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