Alternative to OpenURI for Rails Active Storage

readme.md

Ruby's OpenURI is dangerous and should not be used in production. This is an alternative.

attach_file.rb

def attach_file(url)
  with_downloaded_file(url) do |file|
    my_model.attach(io: file, filename: "filename.jpg")
  end
end

# this example requires the 'httparty' gem
def with_downloaded_file(url)
  file = Tempfile.new
  file.binmode

  begin
    file.write HTTParty.get(url).body
    file.rewind
    yield file if block_given?
  ensure
    file.close
    file.unlink
  end
end