下载ruby:
http://rubyforge.org/frs/?group_id=167&release_id=46722
下载rails:
http://rubyforge.org/
projects/activesupport
http://rubyforge.org/projects/activerecord
http://rubyforge.org/projects/rails
http://rubyforge.org/projects/aws
http://rubyforge.org/projects/actionmailer
http://rubyforge.org/projects/actionpack