gistfile1.rb

EMAIL = ""
PASS = ""
CLIENT_ID = ""

def get_token
  agent = Mechanize.new
  page = agent.get URI.parse "http://www.facebook.com/"
  form = page.forms.first
  form.email = EMAIL
  form.pass = PASS
  res = agent.submit(form)
  page = agent.get URI.parse "https://graph.facebook.com/oauth/authorize?client_id=#{CLIENT_ID}&redirect_uri=http://www.facebook.com/connect/login_success.html&type=user_agent&display=popup&scope=publish_stream"
  #最初にこの URL にブラウザからアクセスして allow しといてね
  #scope offline_access の方が便利かも？？？？？
  page.search("script").last.children.first.to_s.split('"')[1].split("=")[1].split("&").first
end