临时¶

关键词

HTTP协议的头信息详解

在TCP的头部中, 有8比特(bit)用作控制位区域, 其取值为:

CWR | ECE | URG | ACK | PSH | RST | SYN | FIN

实例:

// 普通html
GET / HTTP/1.1
Host: www.zhaoweiguo.com
Connection: keep-alive
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99
Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7
Cookie: Hm_lvt_3735c33915718b8a09c27bed6968779f=1530163340,1530249790,1530510224,1530793155; Hm_lpvt_3735c33915718b8a09
c27bed6968779f=1530880847

// 普通图片
GET /favicon.ico HTTP/1.1
Host: www.zhaoweiguo.com
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99
Safari/537.36
Accept: image/webp,image/apng,image/*,*/*;q=0.8
Referer: http://www.zhaoweiguo.com/
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7
Cookie: Hm_lvt_3735c33915718b8a09c27bed6968779f=1530163340,1530249790,1530510224,1530793155; Hm_lpvt_3735c33915718b8a09
c27bed6968779f=1530880900

说明¶

注：IE6 并不是不支持 HTTPS，而是不支持 SNI，不支持意味着只能一个 IP 对应一个域名一个证书，很明显在现代网站构建中这是一个不合理的设计，详情可以阅读: [https和SNI https://zzyongx.github.io/blogs/https-SNI.html]_