Scrape Images from a web page.

scrape_images.rb

# Add the line to the Gemfile of your application.
gem 'rest-client', '~> 1.6.7'

# In your code, we take website www.designbombs.com as an example to scrape all images.
rs = []
RestClient.get('http://www.designbombs.com/') do |response, _req, _res| 
  if response.code == 200
    response.to_s.scan(/<img[^>]+src\s*=\s*['"]([^'"]+)['"][^>]*>/) do |url|
      rs << url
    end
  end
end
# Then we save all url addresses to the database.

# Or you may want to fetch the file content and save them locally
rs.each do |url|
  RestClient.get(url) do |response, _req, _result|
    # save with paperclip or s3
  end 
end