ruby-on-railsrubypaperclipuser-agentopen-uri

Rewrite User-Agent to all Open URI Request

Using Rails 4.2.10

I would like to open image from URL thanks to mongoid papaerclip and open_uri

It perfectly works in 95% of use cases but some website send me a 404 when they see the user-agent of the request is Ruby.

The problem is with the lib paperclip=> paperclip/io_adapters/uri_adapter.rb in download_content at line 48

def download_content
    options = { read_timeout: Paperclip.options[:read_timeout] }.compact

    open(@target, **options)
end

If I could add here an option it would be great but I don't think it's possible so I would like to add a default header with my user-agentto all request done by open_uri

Solution

  • Luckily for your use case there is no such thing as a class being closed against modification in ruby.

    Add a patch to your rails app in an initializer. The structure is roughly as follows:

    In config/initializers/some_arbitrary_name.rb

    module UriAdapterPatch
  def open(url, options)
    # alter the objects however you want
    super(altered_or_original_url, altered_or_original_options)
  end
end

Paperclip::UriAdapter.prepend(UriAdapterPatch)