expressREST.js

var express = require('express');
var fs = require('fs');
var bodyParser = require('body-parser');
var app = express();
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());

var events = JSON.parse(fs.readFileSync("data.json",'utf8'));
var counter = Object.keys(events).length;

console.log(events);

app.get('/events', function (req, res) {
  events = JSON.parse(fs.readFileSync("data.json",'utf8'));
  res.send(events);
});

app.get('/event/:id', function (req, res) {
  events = JSON.parse(fs.readFileSync("data.json",'utf8'));	
  res.send(events[req.params.id]);
});

app.post('/events', function (req, res) {
  events = JSON.parse(fs.readFileSync("data.json",'utf8'));	
  counter++;
  req.body.id = counter;
  events[counter] = req.body;
  fs.writeFileSync("data.json", JSON.stringify(events), 'utf8');
  res.send(counter);
});

app.put('/event/:id', function (req, res) {
  events = JSON.parse(fs.readFileSync("data.json",'utf8'));	
  req.body.id = req.params.id;	
  events[req.params.id] = req.body;
  fs.writeFileSync("data.json", JSON.stringify(events), 'utf8');
  res.send(events[req.params.id]);
});

app.delete('/event/:id', function (req, res) {
  events = JSON.parse(fs.readFileSync("data.json",'utf8'));
  delete events[req.params.id];	
  fs.writeFileSync("data.json", JSON.stringify(events), 'utf8');
  res.send("ok");
});

app.listen(3000, function () {
  console.log('Example app listening on port 3000!');
});