zoom-index.js

const express = require('express')
const app = express()
const config = require('./config');
const request = require('request');

app.get('/', (req, res) => {
  //this will check if the code parameter is in the url, if not the
  //most likely case is that this is the user's inital visit to oauth
  //and we need to redirect them (Step 1) if there is a code, it most
  //likely means they were redirected here from zoom oauth screen
  if (req.query.code) {

    let url = 'https://zoom.us/oauth/token?grant_type=authorization_code' +
        '&code=' + req.query.code +
        '&redirect_uri=' + config.redirectUrl;

    //STEP 3
    //we need to exchange the code for a oauth token
    request.post(url, function (error, response, body) {

      //the response should be a JSON payload
      body = JSON.parse(body);

      //get refresh token
      let refresh_token = body.refresh_token

      if (body.access_token) {
        //STEP 4
        //we can now use the access token to make API calls
        request.get('https://api.zoom.us/v2/tsp', function (error, response, body) {
          if(error) {
            console.log('Error in API ', error)
            res.send('Not OK!');
            return 'Not OK!';
          } else {
            body = JSON.parse(body);
            console.log('API call ', body);
            //do something with the data this is most likely where you
            //want to connect the zoom user to the calendly user,
            //there will be a zoom user id add where you'll want to
            //store the access token for future requests
            res.send(body);
            return 'OK!';
          }
        }).auth(null, null, true, body.access_token);
      } else {
        //handle error, something went wrong
      }

    }).auth(config.clientID, config.clientSecret);

    return;
  }

  //STEP 2
  //no code provided, so redirect the user to get the code
  res.redirect('https://zoom.us/oauth/authorize?response_type=code' +
               '&client_id=' + config.clientID +
               '&redirect_uri=' + config.redirectUrl);
});

app.listen(3000, () => console.log('Zoom api oauth sample app listening on port 3000!'))