Page 154 - Web性能权威指南
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HTTP 1.1 标准厘清了之前版本中很多有歧义的地方，而且还加入了很多重要的性能
优化：持久连接、分块编码传输、字节范围请求、增强的缓存机制、传输编码及请
求管道。
有了这些新功能，我们就可以像任何当前的 HTTP 浏览器和客户端一样检视 HTTP
1.1 会话：
$> telnet website.org 80
Connected to xxx.xxx.xxx.xxx
GET /index.html HTTP/1.1 ➊
Host: website.org
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_4)... (snip)
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: __qca=P0-800083390... (snip)
HTTP/1.1 200 OK ➋
Server: nginx/1.0.11
Connection: keep-alive
Content-Type: text/html; charset=utf-8
Via: HTTP/1.1 GWA
Date: Wed, 25 Jul 2012 20:23:35 GMT
Expires: Wed, 25 Jul 2012 20:23:35 GMT
Cache-Control: max-age=0, no-cache
Transfer-Encoding: chunked
100 ➌
<!doctype html>
(snip)
100
(snip)
0 ➍
GET /favicon.ico HTTP/1.1 ➎
Host: www.website.org
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_4)... (snip)
Accept: */*
Referer: http://website.org/
Connection: close ➏
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: __qca=P0-800083390... (snip)
HTTP/1.1 200 OK ➐
Server: nginx/1.0.11
HTTP简史 ｜ 139
