nrfcloud message downloader

downloader.js

import fetch from 'node-fetch'
import * as querystring from 'querystring'

const f = (pageNextToken, messages = []) => fetch(`https://api.nrfcloud.com/v1/messages?${querystring.stringify({
    inclusiveStart: '2019-01-01T00:00:00Z',
    exclusiveEnd: new Date().toISOString(),
    pageSort: 'desc',
    pageLimit: 100,
    ...(pageNextToken ? { pageNextToken } : {}),
})}`, {
    headers: {
        'Authorization': 'Bearer <your API key>'
    }
})
    .then(res => res.json())
    .then(({ items, nextStartKey }) => {
        messages.push(...items)
        if (nextStartKey) {
            console.error('.')
            return f(nextStartKey, messages)
        }
        return messages
    })

f()
    .then(messages => {
        console.log(JSON.stringify(messages))
    })