body.js

module.exports = function getBody(request) {
  return new Promise((resolve, reject) => {
    let body = '';

    request.on('data', chunk => {
      body += chunk.toString();
    });

    request.on('end', () => {
      try {
        resolve(JSON.parse(body));
      } catch (error) {
        reject(error);
      }
    });

    request.on('error', error => {
      reject(error);
    });
  });
};