get-auth-token.rb

require 'rubygems'
require 'flickraw-cached'

FlickRaw.api_key="... API KEY HERE ..."
FlickRaw.shared_secret="... Shared Secret ..."

frob = flickr.auth.getFrob
auth_url = FlickRaw.auth_url :frob => frob, :perms => 'read'

puts "Open this url in your process to complete the authication process : #{auth_url}"
puts "Press Enter when you are finished."
STDIN.getc

begin
 auth = flickr.auth.getToken :frob => frob
 login = flickr.test.login
 puts "You are now authenticated as #{login.username} with token #{auth.token}"
rescue FlickRaw::FailedResponse => e
 puts "Authentication failed : #{e.msg}"
end