HTTP协议支持自定义的HTTP请求头和HTTP响应头
自定义HTTP请求头
自定义HTTP响应头
-
百度首页
curl --head http://www.baidu.com/ -L HTTP/1.1 200 OK Date: Sat, 16 Mar 2013 13:05:48 GMT Server: BWS/1.0 Content-Length: 10299 Content-Type: text/html;charset=utf-8 Cache-Control: private Expires: Sat, 16 Mar 2013 13:05:48 GMT Set-Cookie: H_PS_PSSID=1461_1945_1788; path=/; domain=.baidu.com Set-Cookie: BAIDUID=13E06E5B5028459301724FC23A5DA57F:FG=1; expires=Sat, 16-Mar-43 13:05:48 GMT; path=/; domain=.baidu.com P3P: CP=" OTI DSP COR IVA OUR IND COM " Connection: Keep-Alive
注意到上面所有服务器设置的时间均使用到了一个关键词GMT，简单来说这是为了解决全球不同地区的时区差异问题而进行的一项关于时间的标准化设置。
- Google首页
$ curl --head https://www.google.com/ -L HTTP/1.1 302 Found Location: http://www.google.com.hk/url?sa=p&hl=zh-CN&pref=hkredirect&pval=yes&q=http://www.google.com.hk/&ust=1363438927420121&usg=AFQjCNFdSfUt96IedwczFyY_nPYC3ejWuw Cache-Control: private Content-Type: text/html; charset=UTF-8 Set-Cookie: PREF=ID=2910a5c845d5e1b2:FF=0:NW=1:TM=1363438897:LM=1363438897:S=XmLijrDUDKdiz96X; expires=Mon, 16-Mar-2015 13:01:37 GMT; path=/; domain=.google.com Date: Sat, 16 Mar 2013 13:01:37 GMT Server: gws Content-Length: 376 X-XSS-Protection: 1; mode=block X-Frame-Options: SAMEORIGIN HTTP/1.1 302 Found X-Frame-Options: ALLOWALL Location: http://www.google.com.hk/ Cache-Control: private Content-Type: text/html; charset=UTF-8 Set-Cookie: PREF=ID=a55630dc738133db:FF=2:LD=zh-CN:NW=1:TM=1363438897:LM=1363438897:S=jFUaVYSm5frOziFt; expires=Mon, 16-Mar-2015 13:01:37 GMT; path=/; domain=.google.com.hk Set-Cookie: NID=67=q9raMsCzu8dv3ocY7c0QAddUnW5ire1ULB9TUwzzHbzxDnIjbDtqENJZGp7ZyyI5Hnhjz6GAYt_QAbDtcjK7DIQvksyQeb91Idn7I70UoJxkxADWOQOO3F8H5VWK0D14; expires=Sun, 15-Sep-2013 13:01:37 GMT; path=/; domain=.google.com.hk; HttpOnly P3P: CP="This is not a P3P policy! See http://www.google.com/support/accounts/bin/answer.py?hl=en&answer=151657 for more info." Date: Sat, 16 Mar 2013 13:01:37 GMT Server: gws Content-Length: 222 X-XSS-Protection: 1; mode=block HTTP/1.1 200 OK Date: Sat, 16 Mar 2013 13:01:37 GMT Expires: -1 Cache-Control: private, max-age=0 Content-Type: text/html; charset=Big5 Set-Cookie: PREF=ID=93700084ed34fe95:FF=0:NW=1:TM=1363438897:LM=1363438897:S=4nSbOVk98Wo186kE; expires=Mon, 16-Mar-2015 13:01:37 GMT; path=/; domain=.google.com.hk Set-Cookie: NID=67=MGsopB-4bLgSW8WyTrB7PsLbhUeMRgAtt5qoXSF4PMltsY6is2n2IGQ7Ho2Vfk0lgM3DqdL12029V37dX1ALSYezoC3KlVIo9F7qw-b0XJq9N3LVziczOfPqPPypzmtZ; expires=Sun, 15-Sep-2013 13:01:37 GMT; path=/; domain=.google.com.hk; HttpOnly P3P: CP="This is not a P3P policy! See http://www.google.com/support/accounts/bin/answer.py?hl=en&answer=151657 for more info." Server: gws X-XSS-Protection: 1; mode=block X-Frame-Options: SAMEORIGIN Transfer-Encoding: chunked