index.js

// About
// This script exports all stories as XML in a specific folder
// -------
// How to install?
// 1. Create a folder for the project and inside a "data" folder
// 2. $ npm init
// 3. $ npm install storyblok-js-client --save
// 4. Exchange SPACE_ID and TOKEN and startWith
// 5. $ node index.js

const StoryblokClient = require('storyblok-js-client')
const fs = require('fs')
const startWith = 'fr/'
const spaceId = 'SPACE_ID'
const oAuthToken = 'TOKEN'

let Storyblok = new StoryblokClient({
  headers: {'Authorization': oAuthToken}
})

var StoryblokExporter = {
  getAll(page) {
    return Storyblok.get('spaces/' + spaceId + '/stories', {
      per_page: 25,
      search: startWith,
      page: page
    })
  },
  export(id) {
    return Storyblok.get('spaces/' + spaceId + '/stories/' + id + '/export.xml')
  }
}

async function getAllStories(){
  var page = 1
  var res = await StoryblokExporter.getAll(page)
  var all = res.data.stories
  var total = res.total
  var lastPage = Math.ceil((res.total / 25))

  while (page < lastPage){
    page++
    res = await StoryblokExporter.getAll(page)
    res.data.stories.forEach((story) => {
      all.push(story)
    })
  }

  for (var i = 0; i < all.length; i++) {
    exportResult = await StoryblokExporter.export(all[i].id)
    console.log('Saving ' + all[i].id)
    fs.writeFile('./data/' + all[i].id + '.xml', exportResult.data, (err) => {  
      if (err) throw err
    })
  }

  return all
}

getAllStories().then((result) => {
  console.log('Finished')
})