The Hypertext Transfer Protocol (HTTP) is an application-level protocol with the lightness and speed necessary for distributed, collaborative, hypermedia information systems. It is a generic, stateless, object-oriented protocol which can be used for
客户端（浏览器）与web服务器之间的交互主要包含客户的请求和服务器的应答。 请求和应答的格式在超文本传输协议（HTTP）中有定义。HTTP协议使用纯文本。 例如： $telnet www.ouc.edu.cn 80 Trying 211.64.150.68... Connected to www.ouc.edu.cn(211.64.150.68) Escape character is '^]'. GET /index.html HTTP/1.0 HTTP/1.1 200 OK Date: W
