config.ru

require ::File.expand_path('../config/environment',  __FILE__)

use FlashSessionCookie
run Shoperb::Application

flash_session_cookie.rb

require 'rack/utils'

class FlashSessionCookie

  def initialize(app)
    @app = app
    @key = Rails.application.config.session_options[:key]
  end

  def call(env)

    if env["HTTP_USER_AGENT"] =~ /^(Adobe|Shockwave) Flash/
      params = ::Rack::Request.new(env).params

      if params['user_credentials'] && params[@key]
        env['HTTP_COOKIE'] = "user_credentials=#{params['user_credentials']}; #{@key}=#{params[@key]}".freeze
      end

    end

    @app.call(env)
  end

end

gistfile1.txt

gems/railties-3.1.0.rc1/lib/rails/commands/server.rb:46:in `app': undefined method `instance' for #<FlashSessionCookie:0x000001051af738> (NoMethodError)
	from gems/rack-1.3.0/lib/rack/server.rb:301:in `wrapped_app'
	from gems/rack-1.3.0/lib/rack/server.rb:252:in `start'
	from gems/railties-3.1.0.rc1/lib/rails/commands/server.rb:70:in `start'
	from gems/railties-3.1.0.rc1/lib/rails/commands.rb:54:in `block in <top (required)>'
	from gems/ruby-1.9.2-p180@shoperb/gems/railties-3.1.0.rc1/lib/rails/commands.rb:49:in `tap'
	from gems/ruby-1.9.2-p180@shoperb/gems/railties-3.1.0.rc1/lib/rails/commands.rb:49:in `<top (required)>'
	from script/rails:6:in `require'
	from script/rails:6:in `<top (required)>'
	from -e:1:in `load'
	from -e:1:in `<main>'
Exiting