fix_for_chrome_frame_rails_ajax.rb

=begin

This is quick fix for getting Rails to recognize Chrome Frame XmlHttpRequests as
Ajax Requests so that the following code will work.

respond_to do |format|
  format.js { render :text => "chrome frame won't normally see this" }
end

Use:

Throw this file in to the Rails lib directory.

In environment.rb

config.middleware.use 'FixForChromeFrameRailsAjax'

=end

class FixForChromeFrameRailsAjax < Struct.new :app, :options
  def call(env)
    if env['HTTP_USER_AGENT'].match(/chromeframe/) &&
        env['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest' &&
        env['HTTP_ACCEPT'] == '*/*'
      env['HTTP_ACCEPT'] = 'text/javascript, text/html, application/xml, text/xml, */*'
      # env['WE_IS_WORKING_CHROME_FRAME'] = 'yes we did'
    end

    app.call env
  end
end