link.js

// link.js
import r from 'rethinkdb';

let conn = null;

async function init() {
  if (conn) return;
  conn = await r.connect({db:'links'});
}

export async function create(data) {
  await init();
  let inserted = await r.table('links').insert({data});
  return inserted.generated_keys[0];
}

list.js

import level from 'level';
const db = level('links');
import {inspect} from 'util';

db.createReadStream()
.on('data', data => {
  console.log(`${data.key}=${inspect(data.value)}`);
});

server.js

// server.js
import link from './link';
import shortrest from 'shortrest';

const web = shortrest(8099), user = 'test';

web.post('/link', async (req, res) => {
  try {
    const {descr, URL} = req.params; 
    res.json(await link.create({descr, URL, user}));
  } catch (e) {
    res.json({error: e});
  }
});