HTTP简介2

请求行:
格式: 请求方式   资源路径 HTTP版本号
例如: GET /test.html HTTP/1.1
请求方式有: POST,HEAD,OPTIONS,DELETE,PUT

 

状态行:

格式:  HTTP版本号 状态吗 原因描述
例如:   HTTP/1.1 200 OK

 

实例:用telnet请求apache服务器:

>telnet localhost 80 回车
>ctrl+] 回车

>GEG /index.php HTTP/1.0 两个回车

 

HTTP/1.1 200 OK
Date: Wed, 13 Jul 2011 14:25:37 GMT
Server: Apache/2.2.8 (Win32) PHP/6.0.0-dev
Last-Modified: Wed, 13 Jul 2011 14:02:56 GMT
ETag: "f0000000101ef-8-4a7f3df920d68"
Accept-Ranges: bytes
Content-Length: 8
Connection: close
Content-Type: text/html

新建网页

失去了跟主机的连接。

 

>GEG /index.php HTTP/1.1 两个回车

 

HTTP/1.1 400 Bad Request
Date: Wed, 13 Jul 2011 14:27:07 GMT
Server: Apache/2.2.8 (Win32) PHP/6.0.0-dev
Content-Length: 319
Connection: close
Content-Type: text/html; charset=iso-8859-1

                                                 
                                                             
           
                        

Bad Request

                                            

Your browser sent a request that
 this server could not understand.

                                       

                                           

---

                                               

Apache/2.2.8 (Win32) PH
P/6.0.0-dev Server at Port 80

                                                      

失去了跟主机的连接。

>GEG /index.php HTTP/1.1 回车
>Host: 两个回车

 

HTTP/1.1 200 OK
Date: Wed, 13 Jul 2011 14:29:16 GMT
Server: Apache/2.2.8 (Win32) PHP/6.0.0-dev
Last-Modified: Wed, 13 Jul 2011 14:02:56 GMT
ETag: "f0000000101ef-8-4a7f3df920d68"
Accept-Ranges: bytes
Content-Length: 8
Content-Type: text/html

新建网页 //注意:此时连接并没有立即断开,还可以继续发送请求消息

GET /a.html  //简单的请求消息:不需要版本信息,返回后立即断开连接.

新建网页

失去了跟主机的连接。