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rel="me" check should be case-insenstive (#32238)

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This commit is contained in:
Christian Schmidt
2024-11-21 15:37:25 +01:00
committed by GitHub
parent dbddd40c1c
commit 7385016837
5 changed files with 30 additions and 3 deletions
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2
app/lib/link_details_extractor.rb
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@@ -237,7 +237,7 @@ class LinkDetailsExtractor
end
def link_tag(name)
document.xpath("//link[@rel=\"#{name}\"]").pick('href')
document.xpath("//link[nokogiri:link_rel_include(@rel, '#{name}')]", NokogiriHandler).pick('href')
end
def opengraph_tag(name)

12
app/lib/nokogiri_handler.rb Normal file
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@@ -0,0 +1,12 @@
# frozen_string_literal: true
class NokogiriHandler
class << self
# See "set of space-separated tokens" in the HTML5 spec.
WHITE_SPACE = /[ \x09\x0A\x0C\x0D]+/
def link_rel_include(token_list, token)
token_list.to_s.downcase.split(WHITE_SPACE).include?(token.downcase)
end
end
end

2
app/services/fetch_resource_service.rb
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@@ -74,7 +74,7 @@ class FetchResourceService < BaseService
def process_html(response)
page = Nokogiri::HTML5(response.body_with_limit)
json_link = page.xpath('//link[@rel="alternate"]').find { |link| ACTIVITY_STREAM_LINK_TYPES.include?(link['type']) }
json_link = page.xpath('//link[nokogiri:link_rel_include(@rel, "alternate")]', NokogiriHandler).find { |link| ACTIVITY_STREAM_LINK_TYPES.include?(link['type']) }
process(json_link['href'], terminal: true) unless json_link.nil?
end

2
app/services/verify_link_service.rb
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@@ -26,7 +26,7 @@ class VerifyLinkService < BaseService
def link_back_present?
return false if @body.blank?
links = Nokogiri::HTML5(@body).css("a[rel~='me'],link[rel~='me']")
links = Nokogiri::HTML5(@body).xpath('(//a|//link)[@rel][nokogiri:link_rel_include(@rel, "me")]', NokogiriHandler)
if links.any? { |link| link['href']&.downcase == @link_back.downcase }
true

15
spec/services/verify_link_service_spec.rb
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@@ -46,6 +46,21 @@ RSpec.describe VerifyLinkService do
end
end
context 'when a link contains an <a rel=ME> back' do
let(:html) do
<<~HTML
<!doctype html>
<body>
<a href="#{ActivityPub::TagManager.instance.url_for(account)}" rel=ME>Follow me on Mastodon</a>
</body>
HTML
end
it 'marks the field as verified' do
expect(field.verified?).to be true
end
end
context 'when a link contains a <link> back' do
let(:html) do
<<~HTML