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114 lines
2.8 KiB
114 lines
2.8 KiB
# frozen_string_literal: true |
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class Sanitize |
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module Config |
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HTTP_PROTOCOLS = %w( |
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http |
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https |
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).freeze |
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LINK_PROTOCOLS = %w( |
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http |
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https |
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dat |
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dweb |
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ipfs |
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ipns |
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ssb |
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gopher |
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xmpp |
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magnet |
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gemini |
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).freeze |
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CLASS_WHITELIST_TRANSFORMER = lambda do |env| |
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node = env[:node] |
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class_list = node['class']&.split(/[\t\n\f\r ]/) |
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return unless class_list |
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class_list.keep_if do |e| |
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next true if /^(h|p|u|dt|e)-/.match?(e) # microformats classes |
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next true if /^(mention|hashtag)$/.match?(e) # semantic classes |
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next true if /^(ellipsis|invisible)$/.match?(e) # link formatting classes |
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end |
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node['class'] = class_list.join(' ') |
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end |
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TRANSLATE_TRANSFORMER = lambda do |env| |
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node = env[:node] |
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node.remove_attribute('translate') unless node['translate'] == 'no' |
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end |
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UNSUPPORTED_HREF_TRANSFORMER = lambda do |env| |
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return unless env[:node_name] == 'a' |
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current_node = env[:node] |
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scheme = if current_node['href'] =~ Sanitize::REGEX_PROTOCOL |
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Regexp.last_match(1).downcase |
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else |
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:relative |
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end |
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current_node.replace(Nokogiri::XML::Text.new(current_node.text, current_node.document)) unless LINK_PROTOCOLS.include?(scheme) |
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end |
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UNSUPPORTED_ELEMENTS_TRANSFORMER = lambda do |env| |
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return unless %w(h1 h2 h3 h4 h5 h6).include?(env[:node_name]) |
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current_node = env[:node] |
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current_node.name = 'strong' |
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current_node.wrap('<p></p>') |
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end |
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MASTODON_STRICT ||= freeze_config( |
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elements: %w(p br span a del s pre blockquote code b strong u i em ul ol li), |
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attributes: { |
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'a' => %w(href rel class translate), |
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'span' => %w(class translate), |
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'ol' => %w(start reversed), |
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'li' => %w(value), |
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}, |
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add_attributes: { |
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'a' => { |
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'rel' => 'nofollow noopener noreferrer', |
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'target' => '_blank', |
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}, |
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}, |
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protocols: {}, |
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transformers: [ |
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CLASS_WHITELIST_TRANSFORMER, |
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TRANSLATE_TRANSFORMER, |
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UNSUPPORTED_ELEMENTS_TRANSFORMER, |
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UNSUPPORTED_HREF_TRANSFORMER, |
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] |
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) |
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MASTODON_OEMBED = freeze_config( |
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elements: %w(audio iframe source video), |
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attributes: { |
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'audio' => %w(controls), |
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'iframe' => %w(allowfullscreen frameborder height scrolling src width), |
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'source' => %w(src type), |
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'video' => %w(controls height loop width), |
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}, |
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protocols: { |
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'iframe' => { 'src' => HTTP_PROTOCOLS }, |
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'source' => { 'src' => HTTP_PROTOCOLS }, |
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}, |
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add_attributes: { |
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'iframe' => { 'sandbox' => 'allow-scripts allow-same-origin allow-popups allow-popups-to-escape-sandbox allow-forms' }, |
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} |
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) |
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end |
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end
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