Module: Softcover::Sanitizer

Extended by:
Sanitizer
Included in:
Sanitizer
Defined in:
lib/softcover/sanitizer.rb

Instance Method Summary collapse

Instance Method Details

#clean(html) ⇒ Object

Sanitization suitable for displaying untrusted generated html, while retaining useful tags and attributes.



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# File 'lib/softcover/sanitizer.rb', line 10

def clean(html)
  return unless html

  # Make a whitelist of acceptable elements and attributes.
  sanitize_options = {
    elements: %w{div span p a ul ol li h1 h2 h3 h4
                 pre em sup table tbody thead tr td img code strong
                 blockquote small br section aside},
    remove_contents: %w{script},
    attributes: {
      'div' => %w{id class data-tralics-id data-number data-chapter},
      'a'    => %w{id class href target rel},
      'span' => %w{id class style},
      'ol'   => %w{id class},
      'ul'   => %w{id class},
      'li'   => %w{id class},
      'sup'  => %w{id class},
      'h1'   => %w{id class},
      'h2'   => %w{id class},
      'h3'   => %w{id class},
      'h4'   => %w{id class},
      'img'  => %w{id class src alt},
      'em'   => %w{id class},
      'code' => %w{id class},
      'section' => %w{id class},
      'aside' => %w{id class},
      'blockquote' => %w{id class},
      'br' => %w{id class},
      'strong' => %w{id class},
      'table'   => %w{id class},
      'tbody'   => %w{id class},
      'tr'   => %w{id class},
      'td'   => %w{id class colspan}
    },
    css: {
      properties: %w{color height width}
    },
    protocols: {
      'a'   => {'href' => [:relative, 'http', 'https', 'mailto']},
      'img' => {'src'  => [:relative, 'http', 'https']}
    },
    output: :xhtml
  }

  Sanitize.clean(html.force_encoding("UTF-8"), sanitize_options)
end