spotify-track-image.js

'use latest';

import express from 'express';
import request from 'request';
import { fromExpress } from 'webtask-tools';
import bodyParser from 'body-parser';

const app = express();

app.use(bodyParser.json());

function spotifyGet (url) {
  return new Promise(resolve => {
    var authOptions = {
      url: 'https://accounts.spotify.com/api/token',
      headers: {
        'Authorization': '/* insert API crd here */'
      },
      form: {
        grant_type: 'client_credentials'
      },
      json: true
    };

    request.post(authOptions, function(error, response, body) {
      if (!error && response.statusCode === 200) {

        // use the access token to access the Spotify Web API
        var token = body.access_token;
        var options = {
          url,
          headers: {
            'Authorization': 'Bearer ' + token
          },
          json: true
        };

        request.get(options, function(error, response, body) {
          resolve(body);
        });
      }
    });
  });
}

app.get('/:spotifyTrackId', (req, res) => {
  const { spotifyTrackId } = req.params;

  spotifyGet(`https://api.spotify.com/v1/tracks/${spotifyTrackId}`).then(json => {
    res.redirect(json.album.images[0].url);
  });
});

module.exports = fromExpress(app);