# File lib/http/form_data/file.rb, line 36
      def initialize(path_or_io, opts = {})
        opts = FormData.ensure_hash(opts)

        if opts.key? :mime_type
          warn "[DEPRECATED] :mime_type option deprecated, use :content_type"
          opts[:content_type] = opts[:mime_type]
        end

        @io           = make_io(path_or_io)
        @content_type = opts.fetch(:content_type, DEFAULT_MIME).to_s
        @filename     = opts.fetch(:filename, filename_for(@io))
      end