text: var express = require('express');
  var router = express.Router();
  
  var items = [];
  
  router.get('/', function(req, res) {
    res.header('Access-Control-Allow-Origin', '*');
    res.header('Content-Type', 'text/plain; charset="utf-8"');
    res.status(200).json(items);
  });
  
  router.post('/', function(req, res) {
    items.push(req.body.item);
    res.header('Access-Control-Allow-Origin', '*');
    res.status(200).send('OK!');
  });
  
  router.delete('/', function(req, res) {
    res.header('Access-Control-Allow-Origin', '*');
    if(typeof req.query.id === 'undefined') {
      items = [];
      res.status(200).send('Delete OK!');
    } else if(Number(req.query.id) >=0 && Number(req.query.id) < items.length) {
      items.splice(Number(req.query.id), 1);
      res.status(200).send('Delete OK!');
    } else {
      res.status(404).send('Not found!');
    }
  });
  
  router.put('/', function(req, res) {
    res.setHeader('Access-Control-Allow-Origin', '*');
    if(typeof req.query.id === 'undefined') {
      res.status(404).send('Not found!');
    } else if(Number(req.query.id) >=0 && Number(req.query.id) < items.length) {
      items[Number(req.query.id)] = req.body.item;
      res.status(200).send('Update OK!');
    } else {
      res.status(404).send('Not found!');
    }
  });
  
  module.exports = router;
  