Uploading series of large files in node to a web API - node.js

Question

I am trying to create a node script to traverse a folder of large files (mp3s containing 1 hour music sets) and upload them to Mixcloud via their API. It works except in the case where it hits the API rate limit and needs to wait x seconds - I set a timeout and loop back to beginning, but after the set amount of time, the process exits and doesn't log any useful output. Is this due to a bug in my code, or the way I'm running it? I'm currently running it with sudo nohup node index.js > log.log, is this incorrect? my end goal is a script that can be run at the end of every day of our radio station and upload the archived files.
const restler = require('restler');
const fs = require('fs');
const readDir = require('readdir');
const powerOff = require('power-off');
const options = {
folder: 'files',
completefolder: 'complete',
accesstoken: 'xxxxxxxxxxxxxxxxxxxxxxx'
}
// shut down computer
const shutDown = () => {powerOff((err, stderr, stdout) => {
if(!err && !stderr) {
console.log(stdout);
}
})
};
// uploadFile uploads file with restler to mixcloud, if api returns rate limiting object, try again in x seconds
const uploadFile = (folder, filename) => {
const filepath = `./${folder}/${filename}`
fs.stat(`./${folder}/${filename}`, function(err, stats) {
const size = stats.size;
restler.post(`https://api.mixcloud.com/upload/?access_token=${options.accesstoken}`, {
multipart: true,
data: {
"mp3": restler.file(`./${folder}/${filename}`, null, size, null, 'audio/mpeg'),
"name": filename,
// "unlisted": true
// more data can be added here depending on changes in workflow, automate images etc
}
}).on("complete", function(data) {
const returned = JSON.parse(data);
if (returned.error) {
if (returned.error.type == "RateLimitException") {
// try again in x seconds
console.log(`uploading too fast, retrying upload of ${filename}after ${returned.error.retry_after} seconds`);
setTimeout(() => {(folder, filename) => uploadFile}, returned.error.retry_after*1000);
}
else {
console.log('non-rate-limiting error');
console.log(returned);
}
}
else {
console.log('Success!');
console.log(returned);
// move uploaded files into completed folder
fs.rename(`./${folder}/${filename}`, `./${options.completefolder}/${filename}`, (err)=> {
if (err) {
console.log(err)
}
else {
counter += 1;
console.log(counter);
if (counter === files.length) {
console.log('done');
shutDown();
}
}
})
}
});
});
};
// get all mp3s and upload all of them
const files = readDir.readSync(`./${options.folder}`, ['**.mp3'] );
let counter = 0;
for (var i = 0; i < files.length; i++) {
uploadFile(options.folder, files[i])
};