GET VS POST

http://mzhou.me/?p=77001

http://www.diffen.com/difference/Get_vs_Post

http://stevenclark.com.au/2008/01/12/get-vs-post-for-the-beginner/

http://www.cs.tut.fi/~jkorpela/forms/methods.html

http://stackoverflow.com/questions/417142/what-is-the-maximum-length-of-a-url