class KramdownRFC::KDRFC

def process_xml_remotely(input, output, *flags)
  warn "* converting remotely from xml #{input} to txt #{output}" if @options.verbose
  format = flags[0] || "--text"
  # warn [:V3, @options.v3].inspect
  maf = MODE_AS_FORMAT[@options.v3][format]
  unless maf
    raise ArgumentError.new("*** don't know how to convert remotely from xml #{input} to txt #{output}")
  end
  url = URI(XML2RFC_WEBSERVICE)
  req = Net::HTTP::Post.new(url)
  form = [["modeAsFormat", maf],
          ["type", "binary"],
          ["input", File.open(input),
           {filename: "input.xml",
            content_type: "text/plain"}]]
  diag = ["url/form: ", url, form].inspect
  req.set_form(form, 'multipart/form-data')
  res = Net::HTTP::start(url.hostname, url.port,
                         :use_ssl => url.scheme == 'https' ) {|http|
    http.request(req)
  }
  case res
  when Net::HTTPOK
    case res.content_type
    when 'application/octet-stream'
      if res.body == ''
        raise IOError.new("*** HTTP response is empty with status #{res.code}, not written")
      end
      File.open(output, "w") do |fo|
        fo.print(res.body)
      end
      warn "* #{output} written" if @options.verbose
    else
      warning = "*** HTTP response has unexpected content_type #{res.content_type} with status #{res.code}, #{diag}"
      warning << "\n"
      warning << res.body
      raise IOError.new(warning)
    end
  else
    raise IOError.new("*** HTTP response: #{res.code}, #{diag}")
  end
end