node-loffice.js

const spawnSync = require('child_process').spawnSync;

const defaultDestPath = __dirname + '/pdf';

function convertToPdf(filepath, destpath) {
  var resp = {};

  if (destpath == undefined) {
    destpath = defaultDestPath;
  }

  var cmd = 'soffice';
  var args = ['--headless', '"-env:UserInstallation=file:///tmp/LibreOffice_Conversion_${USER}"', '--convert-to', 'pdf:writer_pdf_Export', filepath, '--outdir', destpath]

  var spawn = spawnSync(cmd, args);

  var resp = {};

  if (spawn.error != undefined || spawn.stderr.toString() != '') {
    if (spawn.error != undefined) {
      resp.error = spawn.error.code;
      resp.destpath = null;
    }
    if (spawn.stderr.toString() != '' != null) {
      resp.stderr = spawn.stderr.toString();

      resp.destpath = destpath;
    }
  } else if (spawn.stdout) {
    resp.error = null;
    resp.destpath = destpath;
  }

  return resp;
}

var res = convertToPdf("test.doc");
console.log(res);