Pseudo code for uploading attachments to AWS S3

attachment_processor.rb

# if there are attachments...
if @email.attachments.present?
  # ...loop over each one...
  @email.attachments.each do |attachment|

  # ... and upload to storage provider
  response = storage.put_object($BUCKET_NAME, # S3 bucket
      attachment.original_filename,           # filename
      attachment,                             # the ActionDispatch::Http::UploadedFile object returned by Griddler
      $OPTIONS                                # things like Content-Type headers, S3 acl go here
  )
end