I create a ruby script to submit a post to my local rails application, but doesn't return a data. so I open a log file, saw this.
http://guides.rubyonrails.org/security.html#cross-site-request-forgery-csrf
You can use:
http://apidock.com/rails/ActionController/RequestForgeryProtection/form_authenticity_token
To get the value (or use form_for, which automatically handles it).
Cheers,
Andy