S3_Large_File_Uploader.js

// Dynamic Flags
let args = {};process.argv.forEach(function (val, index, array) {let valsplit = val.split("=");args[valsplit[0]] = valsplit[1]});
// Speedometer
function formatBytes(a,b=2,k=1024){with(Math){let d=floor(log(a)/log(k));return 0==a?"0 Bytes":parseFloat((a/pow(k,d)).toFixed(max(0,b)))+" "+["Bytes","KB","MB","GB","TB","PB","EB","ZB","YB"][d]}}

var fs = require('fs');
var AWS = require('aws-sdk');
const StreamSpeed = require('streamspeed');

// File
if(args['--filename'] == null){
  console.log("File name not specified \n Hint: Use `--filename=` to specify the file to be uploaded")
  process.exit(1)
}
var fileName = args['--filename'];
var filePath = './' + fileName;

if(args['--bucket'] == null){
  console.log("Bucket name not specified \n Hint: Use `--bucket=` to specify the bucket to upload to")
  process.exit(1)
}

if(args['--region'] == null){
  console.log("Region name not specified \n Hint: Use `--region=` to specify the bucket region to upload to")
  process.exit(1)
}

const REGION = args['--region'];
var s3 = new AWS.S3({
  accessKeyId: process.env.AWS_S3_IAM_USER_KEY,
  secretAccessKey: process.env.AWS_S3_IAM_USER_SECRET,
  Bucket: args['--bucket'],
});
// S3 Upload options
var bucket = args['--bucket'];

// node largeUpload.js --filename=<Something Big> --bucket=<bucket> --region=<AWS Region>
// ---------------------------------------------------------------------------------------- CONFIGS

var uploadParams = {Bucket: bucket, Key: '', Body: ''};

var fileStream = fs.createReadStream(fileName);  

let ss = new StreamSpeed();
ss.add(fileStream);

let size = fs.statSync(filePath).size;
let humanReadableSize = formatBytes(size)
let prog = 0;

fileStream.on('data', function(d){
    prog += d.length
})
ss.on('speed', (speed) => {
  process.stdout.clearLine(1);
  process.stdout.cursorTo(0);
  process.stdout.write(`  📁 ${fileName} - (${humanReadableSize}) | 📤 Upload Progress: ${Number((prog / size) * 100).toFixed(0)} % - (${formatBytes(prog)}) | 🚀 Speed: ${formatBytes(speed)}/s  `);
});

fileStream.on('end', function(){
  process.stdout.write(`\n`);
})

fileStream.on('error', function(err) {
  console.log('File Error', err);
});

uploadParams.Body = fileStream;
var path = require('path');
uploadParams.Key = path.basename(fileName);

// call S3 to retrieve upload file to specified bucket
s3.upload (uploadParams, function (err, data) {
  if (err) {
    console.log("Error", err);
  } if (data) {
    console.log("Upload Success:", data.Location);
  }
});