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