在 GET 方法的介绍里有这样的句子: if the request message includes an If-Modified-Since, If-Unmodified-Since, If-Match, If-None-Match, or If-Range header field. A conditional GET method requests that the entity be transferred only under the circumstances described by the conditional header field(s). 刷新的时候 http 头有什么标志吗?我用 2000 Advance server 自带的网络监视器没看出不同来
Pragma: no-cache
Cache-Control: no-cache看一下 netants 的提示就知道了。
if the request message includes an If-Modified-Since, If-Unmodified-Since,
If-Match, If-None-Match, or If-Range header field. A conditional GET
method requests that the entity be transferred only under the
circumstances described by the conditional header field(s). 刷新的时候 http 头有什么标志吗?我用 2000 Advance server 自带的网络监视器没看出不同来