updateInfo.js

require('dotenv').config();
const axios = require('axios');
const fs = require('fs');

const API_KEY = process.env.API_KEY;
const API_URL =
  'https://opendata.uta.fi:8443/apiman-gateway/UTA/opintojaksot/1.0';

axios.defaults.headers.get['X-API-key'] = API_KEY;

const getCourses = async () => {
  try {
    const response = await axios.get(API_URL);
    const data = await response.data;
    // TODO: validate data before writing
    fs.writeFile('./courses.json', JSON.stringify(data), err => {
      if (err) throw Error(err);
    });
  } catch (e) {
    throw Error(e);
  }
};

console.info('\n\nUpdating courses...\n\n');
getCourses()
  .then(() => console.info('\n\nCourses updated!\n\n'))
  .catch(err => console.error(err));