# File lib/mini_magick.rb, line 125
      def open(file_or_url, ext = nil)
        file_or_url = file_or_url.to_s # Force it to be a String... hell or highwater
        if file_or_url.include?("://")
          require 'open-uri'
          ext ||= File.extname(URI.parse(file_or_url).path)
          self.read(Kernel::open(file_or_url), ext)
        else
          ext ||= File.extname(file_or_url)
          File.open(file_or_url, "rb") do |f|
            self.read(f, ext)
          end
        end
      end