Engine are miniature Rails applications that you embed into your main application. You can share an Engine accross different applications. Since Rails 3.0, every Rails application is nothing more than an Engine, allowing you to share it very easily

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You are using devise as the authentication solution in a Rails application. Then you need to allow user to merge their Facebook account with their existing account in your application.

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For a while we have published various posts focused on Rails security. So far, here is the list 1. Session 2. Cross-site reference forgery (CSRF) 3. Redirection We'll keep this page updated as we add more post.

Redirection could lead attacker to create a self-contained attack or forward the user to a trap web site by sending an unsuspicious link into an external site

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I assume you are using Ubuntu and already install Hudson via apt-get. Also you already have rvm configured.

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