Store information from JSON in a temp file

uri = URI('https://api.catalog.com/v2/products')

Net::HTTP.start(uri.host, uri.port, :use_ssl => uri.scheme == 'https') do |http|
  request = Net::HTTP::Get.new uri
  request.basic_auth 'user', 'pass'

  http.request request do |response|
    open 'temp_file_name', 'wb' do |io|
      response.read_body do |chunk|
        io.write chunk
      end
    end
  end
end