好的,我在我们的开发服务器上使用 IIS6 中的过期标头,我真的不明白!
因此,如果我不向文件添加过期标头,则在使用 firebug 查看时会收到以下请求/响应:
Accept */*
Accept-Encoding gzip, deflate
Accept-Language en-gb,en;q=0.5
Cache-Control no-cache
Connection keep-alive
Cookie __utma=222382046.267771103.1330592028.1337002926.1340787333.122; __utmz=222382046.1330592028.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); __utma=76038230.629470783.1340728034.1340728034.1340786921.2; __utmz=76038230.1340728034.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); timeOutCookie=Wed%20Jun%2027%202012%2011%3A17%3A22%20GMT+0100%20%28GMT%20Daylight%20Time%29; __utmb=76038230.26.10.1340786921; __utmb=222382046.5.10.1340787333; ASP.NET_SessionId=yhib5kyxf1m5azuhoogrstt5; __utmc=76038230; Travel2=ECC62DC4F9C36A41F3BCF0C54F96D877FEA32D4867DB1A3A97D0C6A3BE79EE98517B9B1A4E24289C863D86A2A4A846EA1FF4BF3822E8B6CBF872E25DD1ADF306F724EE1500AA71E28CFCD02476748163929B73856C505E50D185C05E6322488F
Host site
Pragma no-cache
Referer http://site/Agents/Flights/FlightSearch.aspx?
回复:
Accept-Ranges bytes
Content-Length 17864
Content-Type application/x-javascript
Date Wed, 27 Jun 2012 09:21:07 GMT
Etag "0de7d7f192dcd1:a07d"
Last-Modified Tue, 08 May 2012 12:53:00 GMT
Server Microsoft-IIS/6.0
X-Powered-By ASP.NET
现在,如果我现在按 f5,系统会从客户端缓存中检索文件,太棒了!
现在,如果我添加 expires 标头并按 ctrl f5 我会得到一个稍微不同的请求/响应:
Accept */*
Accept-Encoding gzip, deflate
Accept-Language en-gb,en;q=0.5
Cache-Control no-cache
Connection keep-alive
Cookie __utma=222382046.267771103.1330592028.1337002926.1340787333.122; __utmz=222382046.1330592028.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); __utma=76038230.629470783.1340728034.1340728034.1340786921.2; __utmz=76038230.1340728034.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); timeOutCookie=Wed%20Jun%2027%202012%2011%3A21%3A11%20GMT+0100%20%28GMT%20Daylight%20Time%29; __utmb=76038230.27.10.1340786921; __utmb=222382046.5.10.1340787333; ASP.NET_SessionId=yhib5kyxf1m5azuhoogrstt5; __utmc=76038230; Travel2=ECC62DC4F9C36A41F3BCF0C54F96D877FEA32D4867DB1A3A97D0C6A3BE79EE98517B9B1A4E24289C863D86A2A4A846EA1FF4BF3822E8B6CBF872E25DD1ADF306F724EE1500AA71E28CFCD02476748163929B73856C505E50D185C05E6322488F
Host site
Pragma no-cache
Referer http://site/Agents/Flights/FlightSearch.aspx?
User-Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:13.0) Gecko/20100101 Firefox/13.0.1
回复:
Accept-Ranges bytes
Cache-Control max-age=86400
Content-Length 17864
Content-Type application/x-javascript
Date Wed, 27 Jun 2012 09:24:41 GMT
Etag "0de7d7f192dcd1:a082"
Last-Modified Tue, 08 May 2012 12:53:00 GMT
Server Microsoft-IIS/6.0
X-Powered-By ASP.NET
太棒了,我现在在缓存控件中获得了最大年龄。现在让我感到困惑的是,据我所知,现在网站在下载方面的表现有实际差异。如果我按 f5 它会从缓存中获取它,如果我按 control f5 它会从带有 HTTP 200 的服务器中获取它。
那么这如何提高性能呢?您如何获得 HTTP 304 而不是 http 200?我只是不明白这实际上是什么档案?
任何帮助都会很好谢谢