48 lines
1.2 KiB
Ruby
48 lines
1.2 KiB
Ruby
# frozen_string_literal: true
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module HTMLProofer
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class Check
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class Favicon < HTMLProofer::Check
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def run
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found = false
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@html.css("link").each do |node|
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@favicon = create_element(node)
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next if @favicon.ignore?
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break if (found = @favicon.node["rel"].split.last.eql?("icon"))
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end
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return if immediate_redirect?
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if found
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if @favicon.url.protocol_relative?
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add_failure(
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"favicon link #{@favicon.url} is a protocol-relative URL, use explicit https:// instead",
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element: @favicon,
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)
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elsif @favicon.url.remote?
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add_to_external_urls(@favicon.url, @favicon.line)
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elsif !@favicon.url.exists?
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add_failure(
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"internal favicon #{@favicon.url.raw_attribute} does not exist",
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element: @favicon,
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)
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end
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else
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add_failure("no favicon provided")
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end
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end
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private
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# allow any instant-redirect meta tag
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def immediate_redirect?
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@html.xpath("//meta[@http-equiv='refresh']").attribute("content").value.start_with?("0;")
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rescue StandardError
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false
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end
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end
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end
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end
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