很不错的学习资料!
HTTP
http://www.cnblogs.com/TankXiao/category/415412.html
http://www.cnblogs.com/TankXiao/archive/2012/02/13/2342672.html
Fiddler
http://www.cnblogs.com/TankXiao/archive/2012/02/06/2337728.html
Wireshark
http://www.cnblogs.com/TankXiao/archive/2012/10/10/2711777.html