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const express = require('express');
const morgan = require('morgan');
const bodyParser = require('body-parser');

const app = express();
const port = process.env.PORT || 3000;

// Add morgan in as middleware to log all requests
app.use(morgan('dev'));
// Add body parser to convert the JSON payload to a JavaScript Object
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());

app.get('/', (request, response) => {
  const success = request.query.success;

  if (success === 'true') {
    response.json({ message: 'Your query parameter worked!', successValue: success });
  } else {
    response.status(400).json({ message: 'You must supply a query parameter' });
  }
});

app.post('/', (request, response) => {
  response.json(request.body);
});

app.listen(port, () => {
  console.log(`Server listening on port ${port}!`);
});

{
  "name": "express-demo",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.18.3",
    "express": "^4.16.4",
    "morgan": "^1.9.1"
  }
}