1 浅析HTTP协议
http://www.cnblogs.com/gpcuster/archive/2009/05/25/1488749.html
2 HTTP协议漫谈
http://www.cnblogs.com/CareySon/archive/2012/04/27/HTTP-Protocol.html
3 HTTP协议详解
http://blog.csdn.net/gueter/article/details/1524447