index.js

let express = require('express');
let app = express();
let request = require('request');

let eventbriteOAuth = process.env.EVENTBRITE_OAUTH;
let eventfulOAuth = process.env.EVENTFUL_OAUTH;

app.use(express.static('public'));

app.get('/events/eventbrite', (eventRequest, eventResponse) => {
  let params = {
    'location.latitude': eventRequest.query.lat,
    'location.longitude': eventRequest.query.long,
    'location.within': eventRequest.query.radius + 'km',
    'start_date.keyword': 'next_week',
    'page': eventRequest.query.page,
  };
  let query = Object.entries(params).map(val => val.join('=')).join('&');
  let options = {
    url: 'https://www.eventbriteapi.com/v3/events/search/?' + query,
    headers: {
      'Authorization': 'Bearer ' + eventbriteOAuth,
    },
  };

  request.get(options, (err, res, body) => {
    if (err) {
      eventResponse.send(err);
      return;
    }

    eventResponse.send(body || res);
  });
});

app.get('/events/eventful', (eventRequest, eventResponse) => {
  let params = {
    'app_key': eventfulOAuth,
    'location': eventRequest.query.lat + ',' + eventRequest.query.long,
    'within': eventRequest.query.radius,
    'units': 'km',
    'date': 'next%20week',
    'include': 'categories',
    'page_number': eventRequest.query.page,
  };
  let query = Object.entries(params).map(val => val.join('=')).join('&');
  let url = 'https://api.eventful.com/json/events/search/?' + query;

  request.get(url, (err, res, body) => {
    if (err) {
      eventResponse.send(err);
      return;
    }

    eventResponse.send(body || res);
  });
});

let port = process.env.PORT || 5000
app.listen(port, () => {
  console.log(`listening on *:${port}`);
  console.log(`running locally? try http://127.0.0.1:${port}`);
});