Adds rel nofollow to external links (#4918)

*  Adds rel nofollow to external links

Fixes #4583

Signed-off-by: Franck Nijhof <frenck@geekchimp.com>

* 🎀 Adds support for appending nofollow to existing external links
This commit is contained in:
Franck Nijhof 2018-03-15 22:21:57 +01:00 committed by Paulus Schoutsen
parent e62bb85ba0
commit 23d593c0f4
4 changed files with 40 additions and 2 deletions

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@ -24,3 +24,4 @@ group :jekyll_plugins do
end
gem 'sinatra', '~> 1.4.2'
gem 'nokogiri'

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@ -42,6 +42,9 @@ GEM
rb-inotify (~> 0.9, >= 0.9.7)
mercenary (0.3.6)
method_source (0.8.2)
mini_portile2 (2.3.0)
nokogiri (1.8.2)
mini_portile2 (~> 2.3.0)
octopress (3.0.11)
jekyll (>= 2.0)
mercenary (~> 0.3.2)
@ -100,6 +103,7 @@ DEPENDENCIES
jekyll-redirect-from
jekyll-sitemap
jekyll-time-to-read
nokogiri
octopress (~> 3.0)
octopress-include-tag
pry
@ -113,4 +117,4 @@ RUBY VERSION
ruby 2.4.1p111
BUNDLED WITH
1.15.4
1.16.1

33
plugins/no_follow.rb Normal file
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@ -0,0 +1,33 @@
# Jekyll Auto Nofollow Plugin
# Automatically adds rel='external nofollow' to outgoing links.
require 'jekyll'
require 'nokogiri'
module Jekyll
module NoFollow
def nofollow(content)
dom = Nokogiri::HTML.fragment(content)
# Find all links
dom.css('a').each do |link|
rel = ['external', 'nofollow']
# All external links start with 'http', skip when this one does not
next unless link.get_attribute('href') =~ /\Ahttp/i
# Play nice with our own links
next if link.get_attribute('href') =~ /\Ahttps?:\/\/\w*.?home-assistant.io/i
# Play nice with links that already have a rel attribute set
rel.unshift(link.get_attribute('rel'))
# Add rel attribute to link
link.set_attribute('rel', rel.join(' ').strip)
end
dom.to_s
end
end
end
Liquid::Template.register_filter(Jekyll::NoFollow)

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@ -24,7 +24,7 @@ layout: compress
<div class="grid__item two-thirds lap-one-whole palm-one-whole">
{% endif %}
{{ content }}
{{ content | nofollow }}
</div>