http://hi.baidu.com/showimg/blog/item/40586838c1c59e2b97ddd897.html
http://www.amk.ca/python/howto/sockets/
http://openexperience.javaeye.com/blog/145701
http://wangtong40.javaeye.com/blog/372275
http://www.woodpecker.org.cn/diveintopy_5_4/index.html
http://www.example-code.com/python/pythonhttp.asp
http://www.ibm.com/developerworks/cn/linux/theme/python/index.html