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firefox 在从响应中接收 Last-modified 后不发送标头:if-modified-since。eg:在火狐浏览器的webview中访问加载一个网站,多次加载该页面后,按F12,在控制台显示如下截图。

Response :
Age 123613
Cache-Control   public, max-age=31536000
Content-Length  93868
Content-Type    text/javascript; charset=UTF-8
Date    Fri, 16 Mar 2012 04:17:48 GMT
Expires Thu, 24 May 2012 14:47:48 GMT
Last-Modified   Wed, 23 Nov 2011 21:10:59 GMT
Server  sffe
Vary    Accept-Encoding
Via 1.1 HSPROXY08
Warning 113 HSPROXY08  
X-Content-Type-Options  nosniff
X-XSS-Protection    1; mode=block

Request:
Accept  */*
Accept-Encoding gzip, deflate
Accept-Language zh-cn,zh;q=0.5
Host    ajax.googleapis.com
Proxy-Connection    keep-alive
Referer https://stackoverflow.com/questions/5066087/load-a-website-in-webview
User-Agent  Mozilla/5.0 (Windows NT 5.1; rv:10.0.2) Gecko/20100101 Firefox/10.0.2

我发现请求标头中没有“if-modified-since”,这就是为什么?

我认为响应状态码应该是 304,但它是 200。

谢谢..

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