b81710c02c
Conflicts: - `CONTRIBUTING.md`: Not a real conflict, glitch-soc quotes the upstream file, which has been changed. Update the quote.
139 lines
3.5 KiB
Ruby
139 lines
3.5 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
class Sanitize
|
|
module Config
|
|
HTTP_PROTOCOLS = %w(
|
|
http
|
|
https
|
|
).freeze
|
|
|
|
LINK_PROTOCOLS = %w(
|
|
http
|
|
https
|
|
dat
|
|
dweb
|
|
ipfs
|
|
ipns
|
|
ssb
|
|
gopher
|
|
xmpp
|
|
magnet
|
|
gemini
|
|
).freeze
|
|
|
|
CLASS_WHITELIST_TRANSFORMER = lambda do |env|
|
|
node = env[:node]
|
|
class_list = node['class']&.split(/[\t\n\f\r ]/)
|
|
|
|
return unless class_list
|
|
|
|
class_list.keep_if do |e|
|
|
next true if /^(h|p|u|dt|e)-/.match?(e) # microformats classes
|
|
next true if /^(mention|hashtag)$/.match?(e) # semantic classes
|
|
next true if /^(ellipsis|invisible)$/.match?(e) # link formatting classes
|
|
end
|
|
|
|
node['class'] = class_list.join(' ')
|
|
end
|
|
|
|
IMG_TAG_TRANSFORMER = lambda do |env|
|
|
node = env[:node]
|
|
|
|
return unless env[:node_name] == 'img'
|
|
|
|
node.name = 'a'
|
|
|
|
node['href'] = node['src']
|
|
if node['alt'].present?
|
|
node.content = "[🖼 #{node['alt']}]"
|
|
else
|
|
url = node['href']
|
|
prefix = url.match(/\Ahttps?:\/\/(www\.)?/).to_s
|
|
text = url[prefix.length, 30]
|
|
text = text + "…" if url[prefix.length..-1].length > 30
|
|
node.content = "[🖼 #{text}]"
|
|
end
|
|
end
|
|
|
|
LINK_REL_TRANSFORMER = lambda do |env|
|
|
return unless env[:node_name] == 'a' and env[:node]['href']
|
|
|
|
node = env[:node]
|
|
|
|
rel = (node['rel'] || '').split(' ') & ['tag']
|
|
unless env[:config][:outgoing] && TagManager.instance.local_url?(node['href'])
|
|
rel += ['nofollow', 'noopener', 'noreferrer']
|
|
end
|
|
node['rel'] = rel.join(' ')
|
|
end
|
|
|
|
UNSUPPORTED_HREF_TRANSFORMER = lambda do |env|
|
|
return unless env[:node_name] == 'a'
|
|
|
|
current_node = env[:node]
|
|
|
|
scheme = begin
|
|
if current_node['href'] =~ Sanitize::REGEX_PROTOCOL
|
|
Regexp.last_match(1).downcase
|
|
else
|
|
:relative
|
|
end
|
|
end
|
|
|
|
current_node.replace(current_node.text) unless LINK_PROTOCOLS.include?(scheme)
|
|
end
|
|
|
|
MASTODON_STRICT ||= freeze_config(
|
|
elements: %w(p br span a abbr del pre blockquote code b strong u sub sup i em h1 h2 h3 h4 h5 ul ol li),
|
|
|
|
attributes: {
|
|
'a' => %w(href rel class title),
|
|
'span' => %w(class),
|
|
'abbr' => %w(title),
|
|
'blockquote' => %w(cite),
|
|
'ol' => %w(start reversed),
|
|
'li' => %w(value),
|
|
},
|
|
|
|
add_attributes: {
|
|
'a' => {
|
|
'target' => '_blank',
|
|
},
|
|
},
|
|
|
|
protocols: {
|
|
'a' => { 'href' => LINK_PROTOCOLS },
|
|
'blockquote' => { 'cite' => LINK_PROTOCOLS },
|
|
},
|
|
|
|
transformers: [
|
|
CLASS_WHITELIST_TRANSFORMER,
|
|
IMG_TAG_TRANSFORMER,
|
|
UNSUPPORTED_HREF_TRANSFORMER,
|
|
LINK_REL_TRANSFORMER,
|
|
]
|
|
)
|
|
|
|
MASTODON_OEMBED ||= freeze_config merge(
|
|
RELAXED,
|
|
elements: RELAXED[:elements] + %w(audio embed iframe source video),
|
|
|
|
attributes: merge(
|
|
RELAXED[:attributes],
|
|
'audio' => %w(controls),
|
|
'embed' => %w(height src type width),
|
|
'iframe' => %w(allowfullscreen frameborder height scrolling src width),
|
|
'source' => %w(src type),
|
|
'video' => %w(controls height loop width),
|
|
'div' => [:data]
|
|
),
|
|
|
|
protocols: merge(
|
|
RELAXED[:protocols],
|
|
'embed' => { 'src' => HTTP_PROTOCOLS },
|
|
'iframe' => { 'src' => HTTP_PROTOCOLS },
|
|
'source' => { 'src' => HTTP_PROTOCOLS }
|
|
)
|
|
)
|
|
end
|
|
end
|