Node/Express upload POST file to AWS

imageUploads.coffee

express     = require('express')
router      = express.Router()
formidable  = require('formidable')
s3          = require('s3')

s3client = s3.createClient
  s3Options:
    accessKeyId:      process.env.AWS_KEY
    secretAccessKey:  process.env.AWS_SECRET
    region: "eu-west-1"

router.post '/upload', (req, res) ->

  form = new formidable.IncomingForm()
  form.parse req, (err, fields, files) ->

    file = files.file

    if err || !file
      res.send 400, 'Couldnt parse request or there was no file uploaded'

    params =
      localFile: file.path
      s3Params:
        Bucket        : process.env.AWS_BUCKET_IMAGE_UPLOADS
        Key           : "imageUploads/" + require('rand-token').generate(12) + "-" + file.name
        ContentType   : file.type
        ACL           : "public-read"

    s3client.uploadFile(params).on 'end', ->
      res.json url:s3.getPublicUrlHttp(params.s3Params.Bucket, params.s3Params.Key)

    .on 'error', (err) ->
      console.log err
      res.send 400, 'Error uploading image to cloud'

module.exports = router