elcorteingles.rb

require 'nokogiri'
require 'open-uri'

Encoding.default_external = 'UTF-8'
query = params['query'] || 'banana'
page = (params['page'] || 0).to_i

url = "https://www.elcorteingles.pt/supermercado/pesquisar/" + (page > 0 ? "#{page}" : "") + "?term=#{query}&search=text"
document = Nokogiri::HTML(open(url, read_timeout: 30))

{
  query: query,
  url: url,
  document: document
}