Linux下telnet验证HTTP协议的头信息
root@ubuntu:/home/huotuotuofly/cProgram# telnet www.thosedays.us 80
Trying 204.74.210.128…
Connected to www.thosedays.us.
Escape character is ‘^]’. //连接成功
GET /index.html HTTP/1.0 //发送请求
HTTP/1.1 200 OK //响应头信息
Date: Sat, 12 Mar 2011 10:19:31 GMT
Server: Apache/2
Last-Modified: Sun, 26 Sep 2010 21:08:25 GMT
ETag: “5f7003e-f4-4913003336440″
Accept-Ranges: bytes
Content-Length: 244
Vary: Accept-Encoding,User-Agent
Connection: close
Content-Type: text/html
<html><head><title>Shared IP</title></head><body><center>This IP is being shared among many domains.<br>To view the domain you are looking for, simply enter the domain name in the location bar of your web browser.<br></center></body></html>Connection closed by foreign host. //非独立IP就会这么显示，因为telnet连接的是IP而非Domain Name.
后面想顺便telnet下百度来着，却发现了件有趣的事：
root@ubuntu:/home/huotuotuofly/cProgram# telnet www.baidu.com 80
Trying 119.75.217.56…
Connected to www.a.shifen.com.
Escape character is ‘^]’.
GET /index.html HTTP/1.0
………
shifen.com是神马东东？鼓鼓之才知道原来百度最早的竞价排名系统就叫“十分”，因为百度每次点击最便宜十分钱- -详情见这。
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