do_GET

# File lib/webrick/httpservlet/erbhandler.rb, line 50
      def do_GET(req, res)
        unless defined?(ERB)
          @logger.warn "#{self.class}: ERB not defined."
          raise HTTPStatus::Forbidden, "ERBHandler cannot work."
        end
        begin
          data = File.open(@script_filename, &:read)
          res.body = evaluate(ERB.new(data), req, res)
          res['content-type'] ||=
            HTTPUtils::mime_type(@script_filename, @config[:MimeTypes])
        rescue StandardError
          raise
        rescue Exception => ex
          @logger.error(ex)
          raise HTTPStatus::InternalServerError, ex.message
        end
      end