Render 404 via catch-all route in Rails 3.1

public_controller.rb

class CmsPageNotFound < StandardError; end
class PublicController < ApplicationController
  
  rescue_from CmsPageNotFound do
    render 'not_found', :status => :not_found and return false
  end

  def index
  end
  
  def show
    @content_item = parse_path(params[:path])
    raise CmsPageNotFound unless @content_item
  end

  private
  def parse_path(path_parts)
    # item = nil
    # path = path_parts.split("/")
    # if path.size == 1 
    #   %w().include?path[0] ? item = true : item = false
    # elsif path_parts.size >= 2
    # end
    # item
    nil
  end

end

routes.rb

  match "*path" => 'public#show'

line 22 needs a correction if you plan to use this =)

elsif path.size >= 2