关于鉴权

http://robblog.iteye.com/blog/554450;
http://www.cnblogs.com/yoleung/articles/1205770.html?login=1#commentform;
http://robblog.iteye.com/blog/556436

http://blog.csdn.net/liuvictor2005/archive/2008/07/27/2719847.aspx