Using send_file to download a file from Amazon S3?

Question

I have a download link in my app from which users should be able to download files which are stored on s3. These files will be publicly accessible on urls which look somethi

Answer 1

The following is what ended up working well for me. Getting the raw data from the S3 object and then using send_data to pass that on to the browser.

Using the aws-sdk gem documentation found here http://docs.aws.amazon.com/AWSRubySDK/latest/AWS/S3/S3Object.html

full controller method

def download
  AWS.config({
    access_key_id: "SECRET_KEY",
    secret_access_key: "SECRET_ACCESS_KEY"
  })

  send_data( 
    AWS::S3.new.buckets["S3_BUCKET"].objects["FILENAME"].read, {
      filename: "NAME_YOUR_FILE.pdf", 
      type: "application/pdf", 
      disposition: 'attachment', 
      stream: 'true', 
      buffer_size: '4096'
    }
  )
end