send_file error: ActionController::MissingFile - Cannot read file - from S3

Question

Generated a presigned_url for a csv file on S3. If I put the url in the browser it opens without any issues.

I want the user to be able to click a link and have the file download onto their computer without touching the server if possible.

The following fails with the error:

ActionController::MissingFile at /foo/1/download
Cannot read file FILE_URL

class FooController < ApplicationController

  def download
    @foo = Foo.find_by( id: params[:id] )
    send_file( @foo.url, filename: @foo.filename )
  end

end

This redirect works without a problem and the file is displays in the browser.

class FooController < ApplicationController

  def download
    @foo = Foo.find_by( id: params[:id] )
    redirect_to @foo.url
  end

end

For anyone that finds this, you can't use send_file with files that aren't local — Curt, Aug 31 '16 at 02:38

score 4 · Accepted Answer · edited May 23 '17 at 11:33

4

To download files from s3 you need to use send_data over send_files.

see this answer for a full example

edited May 23 '17 at 11:33

Community

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answered Aug 31 '16 at 05:40

Frederic Henri

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send_file error: ActionController::MissingFile - Cannot read file - from S3

1 Answers1