Redmine

module Redmine

  module WikiFormatting

    # Combination of SanitizationFilter and ExternalLinksFilter

    class HtmlSanitizer

      Pipeline = HTML::Pipeline.new([

        Redmine::WikiFormatting::CommonMark::SanitizationFilter,

        Redmine::WikiFormatting::CommonMark::ExternalLinksFilter,

      ], {})

      def self.call(html)

        result = Pipeline.call html

        result[:output].to_s

      end

    end

  end

end

# frozen_string_literal: true

# Redmine - project management software

# Copyright (C) 2006-2021  Jean-Philippe Lang

#

# This program is free software; you can redistribute it and/or

# modify it under the terms of the GNU General Public License

# as published by the Free Software Foundation; either version 2

# of the License, or (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

require File.expand_path('../../../../../test_helper', __FILE__)

class Redmine::WikiFormatting::HtmlSanitizerTest < ActiveSupport::TestCase

  def setup

    @sanitizer = Redmine::WikiFormatting::HtmlSanitizer

  end

  def test_should_allow_links_with_safe_url_schemes_and_append_external_class

    %w(http https ftp ssh foo).each do |scheme|

      input = %(<a href="#{scheme}://example.org/">foo</a>)

      assert_equal %(<a href="#{scheme}://example.org/" class="external">foo</a>), @sanitizer.call(input)

    end

  end

  def test_should_reject_links_with_unsafe_url_schemes

    input = %(<a href="javascript:alert('hello');">foo</a>)

    assert_equal "<a>foo</a>", @sanitizer.call(input)

  end

end