33 lines
678 B
Ruby
33 lines
678 B
Ruby
require 'html/pipeline/filter'
|
|
|
|
module Banzai
|
|
module Filter
|
|
# HTML Filter to add a `rel="nofollow"` attribute to external links
|
|
#
|
|
class ExternalLinkFilter < HTML::Pipeline::Filter
|
|
def call
|
|
doc.search('a').each do |node|
|
|
link = node.attr('href')
|
|
|
|
next unless link
|
|
|
|
# Skip non-HTTP(S) links
|
|
next unless link.start_with?('http')
|
|
|
|
# Skip internal links
|
|
next if link.start_with?(internal_url)
|
|
|
|
node.set_attribute('rel', 'nofollow')
|
|
end
|
|
|
|
doc
|
|
end
|
|
|
|
private
|
|
|
|
def internal_url
|
|
@internal_url ||= Gitlab.config.gitlab.url
|
|
end
|
|
end
|
|
end
|
|
end
|