index.js

const fs = require('fs');
const { google } = require('googleapis');
const express = require('express')
const app = express()
const port = 3000


//https://docs.google.com/presentation/d/HERE_IS_THE_FILE_ID
const slideId = "1gieOtIvgm3fm7-WvLdScVPCuVKvwFZVmhEaa39rfOdE"

app.get('/', (req, res) => {
    var data = '';
    const drive = google.drive({ version: 'v3', auth: 'YOUR_API_KEY' });
    const fileStream = fs.createWriteStream('./output.pdf')
    res.contentType('application/pdf')
    drive.files.export({ fileId: slideId, mimeType: 'application/pdf' }, { responseType: 'stream' }, (err, response) => {
        response.data.on('data', function(chunk) {
            data += chunk;
            res.write(chunk)
          });
        
          response.data.on('end', function() {
            res.end(undefined, 'binary')
          });
    })
})

app.listen(port, () => console.log(`Example app listening on port ${port}!`))