File upload from Node.js to Amazon S3 with the REST API and the minimal aws4 npm package

s3-upload

#!/usr/bin/env node

// This script uploads a local file to S3
// Depends on the aws4 npm package for AWS signatures
// Usage:
// AWS_ACCESS_KEY_ID=... AWS_SECRET_ACCESS_KEY=... s3-upload

const fs = require('fs')
const https = require('https')
const aws4 = require('aws4') // Handles complex AWS signatures: http://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-header-based-auth.html

const FILE_PATH = '...'
const BUCKET = '...'
const REGION = '...'
const S3_PATH = '...'
const ACL = 'public-read'

const data = fs.readFileSync(FILE_PATH)

const opts = {
  host: `${BUCKET}.s3.amazonaws.com`,
  service: 's3',
  region: REGION,
  path: S3_PATH,
  method: 'PUT',
  headers: {
    'x-amz-acl': ACL
  },
  body: data
}

aws4.sign(opts)

console.log(`Uploading file...`)
const req = https.request(opts, function(res) {
  console.log(`File upload complete status=${res.statusCode}`)
  res.pipe(process.stdout)
})
req.end(data)