用telnet发送HTTP请求进行测试
在日常工作中可能经常发送HTTP请求对服务器进行测试，如果用专门的工具显得不方便，也比较耗时间。而telnet则是比较方便的工具之一。
第一步： telnet到目标机的端口：如
telnet www.baidu.com 80
如果目标机正常，则会出现如下的情况：
[root ~]# telnet www.baidu.com 80
Trying 202.108.22.43...
Connected to www.baidu.com (202.108.22.43).
Escape character is '^]'.
此时输入
GET / HTTP/1.1
Host: www.baidu.com
再加两个回车，如果一切正常，系统会返回如下。
[root ~]# telnet www.baidu.com 80
Trying 202.108.22.43...
Connected to www.baidu.com (202.108.22.43).
Escape character is '^]'.
GET / HTTP/1.1
Host: www.baidu.com
HTTP/1.1 200 OK
Date: Mon, 09 Nov 2009 07:50:56 GMT
Server: BWS/1.0
Content-Length: 3520
Content-Type: text/html;charset=gb2312
Cache-Control: private
Expires: Mon, 09 Nov 2009 07:50:56 GMT
Set-Cookie: BAIDUID=CE207C279A7C9F5A3B05535EBC8E81F0:FG=1; expires=Mon, 09-Nov-39 07:50:56 GMT; path=/; domain=.baidu.com
P3P: CP=" OTI DSP COR IVA OUR IND COM "
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