39 lines
985 B
Ruby
39 lines
985 B
Ruby
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require 'html/pipeline/filter'
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require 'html/pipeline/sanitization_filter'
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module Gitlab
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module Markdown
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# Sanitize HTML
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#
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# Extends HTML::Pipeline::SanitizationFilter with a custom whitelist.
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class SanitizationFilter < HTML::Pipeline::SanitizationFilter
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def whitelist
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whitelist = HTML::Pipeline::SanitizationFilter::WHITELIST
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# Allow `class` and `id` on all elements
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whitelist[:attributes][:all].push('class', 'id')
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# Allow table alignment
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whitelist[:attributes]['th'] = %w(style)
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whitelist[:attributes]['td'] = %w(style)
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# Allow span elements
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whitelist[:elements].push('span')
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# Remove `rel` attribute from `a` elements
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whitelist[:transformers].push(remove_rel)
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whitelist
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end
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def remove_rel
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lambda do |env|
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if env[:node_name] == 'a'
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env[:node].remove_attribute('rel')
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end
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end
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end
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end
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end
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end
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