mirror of
https://github.com/discourse/discourse.git
synced 2024-11-29 13:03:44 +08:00
9e241e82e9
https://meta.discourse.org/t/markdown-preview-and-result-differ/263878 The result of this markdown had different results in the composer preview and the post. This is solved by updating Loofah to the latest version and using html5 fragments like our user had reported. While the change was only needed in cooked_post_processor.rb for this fix, other areas also had to be updated due to various side effects.
780 lines
25 KiB
Ruby
780 lines
25 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require "mini_racer"
|
|
require "nokogiri"
|
|
require "erb"
|
|
|
|
module PrettyText
|
|
DANGEROUS_BIDI_CHARACTERS = [
|
|
"\u202A",
|
|
"\u202B",
|
|
"\u202C",
|
|
"\u202D",
|
|
"\u202E",
|
|
"\u2066",
|
|
"\u2067",
|
|
"\u2068",
|
|
"\u2069",
|
|
].freeze
|
|
DANGEROUS_BIDI_REGEXP = Regexp.new(DANGEROUS_BIDI_CHARACTERS.join("|")).freeze
|
|
|
|
BLOCKED_HOTLINKED_SRC_ATTR = "data-blocked-hotlinked-src"
|
|
BLOCKED_HOTLINKED_SRCSET_ATTR = "data-blocked-hotlinked-srcset"
|
|
|
|
@mutex = Mutex.new
|
|
@ctx_init = Mutex.new
|
|
|
|
def self.app_root
|
|
Rails.root
|
|
end
|
|
|
|
def self.find_file(root, filename)
|
|
return filename if File.file?("#{root}#{filename}")
|
|
|
|
es6_name = "#{filename}.js.es6"
|
|
return es6_name if File.file?("#{root}#{es6_name}")
|
|
|
|
js_name = "#{filename}.js"
|
|
return js_name if File.file?("#{root}#{js_name}")
|
|
|
|
erb_name = "#{filename}.js.es6.erb"
|
|
return erb_name if File.file?("#{root}#{erb_name}")
|
|
|
|
erb_name = "#{filename}.js.erb"
|
|
return erb_name if File.file?("#{root}#{erb_name}")
|
|
end
|
|
|
|
def self.apply_es6_file(ctx, root_path, part_name)
|
|
filename = find_file(root_path, part_name)
|
|
if filename
|
|
source = File.read("#{root_path}#{filename}")
|
|
source = ERB.new(source).result(binding) if filename =~ /\.erb\z/
|
|
|
|
transpiler = DiscourseJsProcessor::Transpiler.new
|
|
transpiled = transpiler.perform(source, "#{Rails.root}/app/assets/javascripts/", part_name)
|
|
ctx.eval(transpiled)
|
|
else
|
|
# Look for vendored stuff
|
|
vendor_root = "#{Rails.root}/vendor/assets/javascripts/"
|
|
filename = find_file(vendor_root, part_name)
|
|
ctx.eval(File.read("#{vendor_root}#{filename}")) if filename
|
|
end
|
|
end
|
|
|
|
def self.ctx_load_directory(ctx, path)
|
|
root_path = "#{Rails.root}/app/assets/javascripts/"
|
|
Dir["#{root_path}#{path}/**/*"].sort.each do |f|
|
|
apply_es6_file(ctx, root_path, f.sub(root_path, "").sub(/\.js(.es6)?\z/, ""))
|
|
end
|
|
end
|
|
|
|
def self.create_es6_context
|
|
ctx = MiniRacer::Context.new(timeout: 25_000, ensure_gc_after_idle: 2000)
|
|
|
|
ctx.eval("window = {}; window.devicePixelRatio = 2;") # hack to make code think stuff is retina
|
|
|
|
ctx.attach("rails.logger.info", proc { |err| Rails.logger.info(err.to_s) })
|
|
ctx.attach("rails.logger.warn", proc { |err| Rails.logger.warn(err.to_s) })
|
|
ctx.attach("rails.logger.error", proc { |err| Rails.logger.error(err.to_s) })
|
|
ctx.eval <<~JS
|
|
console = {
|
|
prefix: "[PrettyText] ",
|
|
log: function(...args){ rails.logger.info(console.prefix + args.join(" ")); },
|
|
warn: function(...args){ rails.logger.warn(console.prefix + args.join(" ")); },
|
|
error: function(...args){ rails.logger.error(console.prefix + args.join(" ")); }
|
|
}
|
|
JS
|
|
|
|
ctx.eval("__PRETTY_TEXT = true")
|
|
|
|
PrettyText::Helpers.instance_methods.each do |method|
|
|
ctx.attach("__helpers.#{method}", PrettyText::Helpers.method(method))
|
|
end
|
|
|
|
root_path = "#{Rails.root}/app/assets/javascripts/"
|
|
ctx_load(ctx, "#{root_path}/node_modules/loader.js/dist/loader/loader.js")
|
|
ctx_load(ctx, "#{root_path}/handlebars-shim.js")
|
|
ctx_load(ctx, "#{root_path}/node_modules/xss/dist/xss.js")
|
|
ctx.load("#{Rails.root}/lib/pretty_text/vendor-shims.js")
|
|
ctx_load_directory(ctx, "pretty-text/addon")
|
|
ctx_load_directory(ctx, "pretty-text/engines/discourse-markdown")
|
|
ctx_load(ctx, "#{root_path}/node_modules/markdown-it/dist/markdown-it.js")
|
|
|
|
apply_es6_file(ctx, root_path, "discourse-common/addon/lib/get-url")
|
|
apply_es6_file(ctx, root_path, "discourse-common/addon/lib/object")
|
|
apply_es6_file(ctx, root_path, "discourse-common/addon/lib/deprecated")
|
|
apply_es6_file(ctx, root_path, "discourse-common/addon/lib/escape")
|
|
apply_es6_file(ctx, root_path, "discourse-common/addon/utils/watched-words")
|
|
apply_es6_file(ctx, root_path, "discourse/app/lib/to-markdown")
|
|
apply_es6_file(ctx, root_path, "discourse/app/lib/utilities")
|
|
|
|
ctx.load("#{Rails.root}/lib/pretty_text/shims.js")
|
|
ctx.eval("__setUnicode(#{Emoji.unicode_replacements_json})")
|
|
|
|
to_load = []
|
|
DiscoursePluginRegistry.each_globbed_asset do |a|
|
|
to_load << a if File.file?(a) && a =~ /discourse-markdown/
|
|
end
|
|
to_load.uniq.each do |f|
|
|
if f =~ %r{\A.+assets/javascripts/}
|
|
root = Regexp.last_match[0]
|
|
apply_es6_file(ctx, root, f.sub(root, "").sub(/\.js(\.es6)?\z/, ""))
|
|
end
|
|
end
|
|
|
|
DiscoursePluginRegistry.vendored_core_pretty_text.each { |vpt| ctx.eval(File.read(vpt)) }
|
|
|
|
DiscoursePluginRegistry.vendored_pretty_text.each { |vpt| ctx.eval(File.read(vpt)) }
|
|
|
|
ctx
|
|
end
|
|
|
|
def self.v8
|
|
return @ctx if @ctx
|
|
|
|
# ensure we only init one of these
|
|
@ctx_init.synchronize do
|
|
return @ctx if @ctx
|
|
@ctx = create_es6_context
|
|
end
|
|
|
|
@ctx
|
|
end
|
|
|
|
def self.reset_translations
|
|
v8.eval("__resetTranslationTree()")
|
|
end
|
|
|
|
def self.reset_context
|
|
@ctx_init.synchronize do
|
|
@ctx&.dispose
|
|
@ctx = nil
|
|
end
|
|
end
|
|
|
|
# Acceptable options:
|
|
#
|
|
# disable_emojis - Disables the emoji markdown engine.
|
|
# features - A hash where the key is the markdown feature name and the value is a boolean to enable/disable the markdown feature.
|
|
# The hash is merged into the default features set in pretty-text.js which can be used to add new features or disable existing features.
|
|
# features_override - An array of markdown feature names to override the default markdown feature set. Currently used by plugins to customize what features should be enabled
|
|
# when rendering markdown.
|
|
# markdown_it_rules - An array of markdown rule names which will be applied to the markdown-it engine. Currently used by plugins to customize what markdown-it rules should be
|
|
# enabled when rendering markdown.
|
|
# topic_id - Topic id for the post being cooked.
|
|
# user_id - User id for the post being cooked.
|
|
# force_quote_link - Always create the link to the quoted topic for [quote] bbcode. Normally this only happens
|
|
# if the topic_id provided is different from the [quote topic:X].
|
|
# hashtag_context - Defaults to "topic-composer" if not supplied. Controls the order of #hashtag lookup results
|
|
# based on registered hashtag contexts from the `#register_hashtag_search_param` plugin API
|
|
# method.
|
|
def self.markdown(text, opts = {})
|
|
# we use the exact same markdown converter as the client
|
|
# TODO: use the same extensions on both client and server (in particular the template for mentions)
|
|
baked = nil
|
|
text = text || ""
|
|
|
|
protect do
|
|
context = v8
|
|
|
|
custom_emoji = {}
|
|
Emoji.custom.map { |e| custom_emoji[e.name] = e.url }
|
|
|
|
# note, any additional options added to __optInput here must be
|
|
# also be added to the buildOptions function in pretty-text.js,
|
|
# otherwise they will be discarded
|
|
buffer = +<<~JS
|
|
__optInput = {};
|
|
__optInput.siteSettings = #{SiteSetting.client_settings_json};
|
|
#{"__optInput.disableEmojis = true" if opts[:disable_emojis]}
|
|
__paths = #{paths_json};
|
|
__optInput.getURL = __getURL;
|
|
#{"__optInput.features = #{opts[:features].to_json};" if opts[:features]}
|
|
#{"__optInput.featuresOverride = #{opts[:features_override].to_json};" if opts[:features_override]}
|
|
#{"__optInput.markdownItRules = #{opts[:markdown_it_rules].to_json};" if opts[:markdown_it_rules]}
|
|
__optInput.getCurrentUser = __getCurrentUser;
|
|
__optInput.lookupAvatar = __lookupAvatar;
|
|
__optInput.lookupPrimaryUserGroup = __lookupPrimaryUserGroup;
|
|
__optInput.formatUsername = __formatUsername;
|
|
__optInput.getTopicInfo = __getTopicInfo;
|
|
__optInput.categoryHashtagLookup = __categoryLookup;
|
|
__optInput.hashtagLookup = __hashtagLookup;
|
|
__optInput.customEmoji = #{custom_emoji.to_json};
|
|
__optInput.customEmojiTranslation = #{Plugin::CustomEmoji.translations.to_json};
|
|
__optInput.emojiUnicodeReplacer = __emojiUnicodeReplacer;
|
|
__optInput.emojiDenyList = #{Emoji.denied.to_json};
|
|
__optInput.lookupUploadUrls = __lookupUploadUrls;
|
|
__optInput.censoredRegexp = #{WordWatcher.serializable_word_matcher_regexp(:censor, engine: :js).to_json};
|
|
__optInput.watchedWordsReplace = #{WordWatcher.word_matcher_regexps(:replace, engine: :js).to_json};
|
|
__optInput.watchedWordsLink = #{WordWatcher.word_matcher_regexps(:link, engine: :js).to_json};
|
|
__optInput.additionalOptions = #{Site.markdown_additional_options.to_json};
|
|
__optInput.avatar_sizes = #{SiteSetting.avatar_sizes.to_json};
|
|
JS
|
|
|
|
buffer << "__optInput.topicId = #{opts[:topic_id].to_i};\n" if opts[:topic_id]
|
|
|
|
if opts[:force_quote_link]
|
|
buffer << "__optInput.forceQuoteLink = #{opts[:force_quote_link]};\n"
|
|
end
|
|
|
|
buffer << "__optInput.userId = #{opts[:user_id].to_i};\n" if opts[:user_id]
|
|
|
|
opts[:hashtag_context] = opts[:hashtag_context] || "topic-composer"
|
|
hashtag_types_as_js =
|
|
HashtagAutocompleteService
|
|
.ordered_types_for_context(opts[:hashtag_context])
|
|
.map { |t| "'#{t}'" }
|
|
.join(",")
|
|
buffer << "__optInput.hashtagTypesInPriorityOrder = [#{hashtag_types_as_js}];\n"
|
|
buffer << "__optInput.hashtagIcons = #{HashtagAutocompleteService.data_source_icon_map.to_json};\n"
|
|
|
|
buffer << "__textOptions = __buildOptions(__optInput);\n"
|
|
buffer << ("__pt = new __PrettyText(__textOptions);")
|
|
|
|
# Be careful disabling sanitization. We allow for custom emails
|
|
buffer << ("__pt.disableSanitizer();") if opts[:sanitize] == false
|
|
|
|
opts = context.eval(buffer)
|
|
|
|
DiscourseEvent.trigger(:markdown_context, context)
|
|
baked = context.eval("__pt.cook(#{text.inspect})")
|
|
end
|
|
|
|
baked
|
|
end
|
|
|
|
def self.paths_json
|
|
paths = { baseUri: Discourse.base_path, CDN: Rails.configuration.action_controller.asset_host }
|
|
|
|
if SiteSetting.Upload.enable_s3_uploads
|
|
paths[:S3CDN] = SiteSetting.Upload.s3_cdn_url if SiteSetting.Upload.s3_cdn_url.present?
|
|
paths[:S3BaseUrl] = Discourse.store.absolute_base_url
|
|
end
|
|
|
|
paths.to_json
|
|
end
|
|
|
|
# leaving this here, cause it invokes v8, don't want to implement twice
|
|
def self.avatar_img(avatar_template, size)
|
|
protect { v8.eval(<<~JS) }
|
|
__optInput = {};
|
|
__optInput.avatar_sizes = #{SiteSetting.avatar_sizes.to_json};
|
|
__paths = #{paths_json};
|
|
__utils.avatarImg({size: #{size.inspect}, avatarTemplate: #{avatar_template.inspect}}, __getURL);
|
|
JS
|
|
end
|
|
|
|
def self.unescape_emoji(title)
|
|
return title unless SiteSetting.enable_emoji? && title
|
|
|
|
set = SiteSetting.emoji_set.inspect
|
|
custom = Emoji.custom.map { |e| [e.name, e.url] }.to_h.to_json
|
|
|
|
protect { v8.eval(<<~JS) }
|
|
__paths = #{paths_json};
|
|
__performEmojiUnescape(#{title.inspect}, {
|
|
getURL: __getURL,
|
|
emojiSet: #{set},
|
|
emojiCDNUrl: "#{SiteSetting.external_emoji_url.blank? ? "" : SiteSetting.external_emoji_url}",
|
|
customEmoji: #{custom},
|
|
enableEmojiShortcuts: #{SiteSetting.enable_emoji_shortcuts},
|
|
inlineEmoji: #{SiteSetting.enable_inline_emoji_translation}
|
|
});
|
|
JS
|
|
end
|
|
|
|
def self.escape_emoji(title)
|
|
return unless title
|
|
|
|
replace_emoji_shortcuts = SiteSetting.enable_emoji && SiteSetting.enable_emoji_shortcuts
|
|
|
|
protect { v8.eval(<<~JS) }
|
|
__performEmojiEscape(#{title.inspect}, {
|
|
emojiShortcuts: #{replace_emoji_shortcuts},
|
|
inlineEmoji: #{SiteSetting.enable_inline_emoji_translation}
|
|
});
|
|
JS
|
|
end
|
|
|
|
def self.cook(text, opts = {})
|
|
options = opts.dup
|
|
working_text = text.dup
|
|
|
|
sanitized = markdown(working_text, options)
|
|
|
|
doc = Nokogiri::HTML5.fragment(sanitized)
|
|
|
|
add_nofollow = !options[:omit_nofollow] && SiteSetting.add_rel_nofollow_to_user_content
|
|
add_rel_attributes_to_user_content(doc, add_nofollow)
|
|
strip_hidden_unicode_bidirectional_characters(doc)
|
|
sanitize_hotlinked_media(doc)
|
|
|
|
add_mentions(doc, user_id: opts[:user_id]) if SiteSetting.enable_mentions
|
|
|
|
scrubber = Loofah::Scrubber.new { |node| node.remove if node.name == "script" }
|
|
loofah_fragment = Loofah.html5_fragment(doc.to_html)
|
|
loofah_fragment.scrub!(scrubber).to_html
|
|
end
|
|
|
|
def self.strip_hidden_unicode_bidirectional_characters(doc)
|
|
return if !DANGEROUS_BIDI_REGEXP.match?(doc.content)
|
|
|
|
doc
|
|
.css("code,pre")
|
|
.each do |code_tag|
|
|
next if !DANGEROUS_BIDI_REGEXP.match?(code_tag.content)
|
|
|
|
DANGEROUS_BIDI_CHARACTERS.each do |bidi|
|
|
next if !code_tag.content.include?(bidi)
|
|
|
|
formatted = "<U+#{bidi.ord.to_s(16).upcase}>"
|
|
code_tag.inner_html =
|
|
code_tag.inner_html.gsub(
|
|
bidi,
|
|
"<span class=\"bidi-warning\" title=\"#{I18n.t("post.hidden_bidi_character")}\">#{formatted}</span>",
|
|
)
|
|
end
|
|
end
|
|
end
|
|
|
|
def self.sanitize_hotlinked_media(doc)
|
|
return if !SiteSetting.block_hotlinked_media
|
|
|
|
allowed_pattern = allowed_src_pattern
|
|
|
|
doc
|
|
.css("img[src], source[src], source[srcset], track[src]")
|
|
.each do |el|
|
|
if el["src"] && !el["src"].match?(allowed_pattern)
|
|
el[PrettyText::BLOCKED_HOTLINKED_SRC_ATTR] = el.delete("src")
|
|
end
|
|
|
|
if el["srcset"]
|
|
srcs = el["srcset"].split(",").map { |e| e.split(" ", 2)[0].presence }
|
|
if srcs.any? { |src| !src.match?(allowed_pattern) }
|
|
el[PrettyText::BLOCKED_HOTLINKED_SRCSET_ATTR] = el.delete("srcset")
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
def self.add_rel_attributes_to_user_content(doc, add_nofollow)
|
|
allowlist = []
|
|
|
|
domains = SiteSetting.exclude_rel_nofollow_domains
|
|
allowlist = domains.split("|") if domains.present?
|
|
|
|
site_uri = nil
|
|
doc
|
|
.css("a")
|
|
.each do |l|
|
|
href = l["href"].to_s
|
|
l["rel"] = "noopener" if l["target"] == "_blank"
|
|
|
|
begin
|
|
uri = URI(UrlHelper.encode_component(href))
|
|
site_uri ||= URI(Discourse.base_url)
|
|
|
|
same_domain =
|
|
!uri.host.present? || uri.host == site_uri.host ||
|
|
uri.host.ends_with?(".#{site_uri.host}") ||
|
|
allowlist.any? { |u| uri.host == u || uri.host.ends_with?(".#{u}") }
|
|
|
|
l["rel"] = "noopener nofollow ugc" if add_nofollow && !same_domain
|
|
rescue URI::Error
|
|
# add a nofollow anyway
|
|
l["rel"] = "noopener nofollow ugc"
|
|
end
|
|
end
|
|
end
|
|
|
|
class DetectedLink < Struct.new(:url, :is_quote)
|
|
end
|
|
|
|
def self.extract_links(html)
|
|
links = []
|
|
doc = Nokogiri::HTML5.fragment(html)
|
|
|
|
# extract onebox links
|
|
doc
|
|
.css("aside.onebox[data-onebox-src]")
|
|
.each { |onebox| links << DetectedLink.new(onebox["data-onebox-src"], false) }
|
|
|
|
# remove href inside quotes & oneboxes & elided part
|
|
doc.css("aside.quote a, aside.onebox a, .elided a").remove
|
|
|
|
# remove hotlinked images
|
|
doc.css("a.onebox > img").each { |img| img.parent.remove }
|
|
|
|
# extract all links
|
|
doc
|
|
.css("a")
|
|
.each do |a|
|
|
links << DetectedLink.new(a["href"], false) if a["href"].present? && a["href"][0] != "#"
|
|
end
|
|
|
|
# extract quotes
|
|
doc
|
|
.css("aside.quote[data-topic]")
|
|
.each do |aside|
|
|
if aside["data-topic"].present?
|
|
url = +"/t/#{aside["data-topic"]}"
|
|
url << "/#{aside["data-post"]}" if aside["data-post"].present?
|
|
links << DetectedLink.new(url, true)
|
|
end
|
|
end
|
|
|
|
# extract Youtube links
|
|
doc
|
|
.css("div[data-video-id]")
|
|
.each do |div|
|
|
if div["data-video-id"].present? && div["data-provider-name"].present?
|
|
base_url =
|
|
case div["data-provider-name"]
|
|
when "youtube"
|
|
"https://www.youtube.com/watch?v="
|
|
when "vimeo"
|
|
"https://vimeo.com/"
|
|
when "tiktok"
|
|
"https://m.tiktok.com/v/"
|
|
end
|
|
links << DetectedLink.new(base_url + div["data-video-id"], false)
|
|
end
|
|
end
|
|
|
|
links
|
|
end
|
|
|
|
def self.extract_mentions(cooked)
|
|
mentions =
|
|
cooked
|
|
.css(".mention, .mention-group")
|
|
.map do |e|
|
|
if (name = e.inner_text)
|
|
name = name[1..-1]
|
|
name = User.normalize_username(name)
|
|
name
|
|
end
|
|
end
|
|
|
|
mentions =
|
|
DiscoursePluginRegistry.apply_modifier(:pretty_text_extract_mentions, mentions, cooked)
|
|
|
|
mentions.compact!
|
|
mentions.uniq!
|
|
mentions
|
|
end
|
|
|
|
def self.excerpt(html, max_length, options = {})
|
|
# TODO: properly fix this HACK in ExcerptParser without introducing XSS
|
|
doc = Nokogiri::HTML5.fragment(html)
|
|
DiscourseEvent.trigger(:reduce_excerpt, doc, options)
|
|
strip_image_wrapping(doc)
|
|
strip_oneboxed_media(doc)
|
|
|
|
if SiteSetting.enable_experimental_hashtag_autocomplete && options[:plain_hashtags]
|
|
convert_hashtag_links_to_plaintext(doc)
|
|
end
|
|
|
|
html = doc.to_html
|
|
ExcerptParser.get_excerpt(html, max_length, options)
|
|
end
|
|
|
|
def self.convert_hashtag_links_to_plaintext(doc)
|
|
doc
|
|
.css("a.hashtag-cooked")
|
|
.each { |hashtag| hashtag.replace("##{hashtag.attributes["data-slug"]}") }
|
|
end
|
|
|
|
def self.strip_links(string)
|
|
return string if string.blank?
|
|
|
|
# If the user is not basic, strip links from their bio
|
|
fragment = Nokogiri::HTML5.fragment(string)
|
|
fragment.css("a").each { |a| a.replace(a.inner_html) }
|
|
fragment.to_html
|
|
end
|
|
|
|
def self.make_all_links_absolute(doc)
|
|
site_uri = nil
|
|
doc
|
|
.css("a")
|
|
.each do |link|
|
|
href = link["href"].to_s
|
|
begin
|
|
uri = URI(href)
|
|
site_uri ||= URI(Discourse.base_url)
|
|
unless uri.host.present? || href.start_with?("mailto")
|
|
link["href"] = "#{site_uri}#{link["href"]}"
|
|
end
|
|
rescue URI::Error
|
|
# leave it
|
|
end
|
|
end
|
|
end
|
|
|
|
def self.strip_image_wrapping(doc)
|
|
doc.css(".lightbox-wrapper .meta").remove
|
|
end
|
|
|
|
def self.strip_oneboxed_media(doc)
|
|
doc.css("audio").remove
|
|
doc.css(".video-onebox,video").remove
|
|
end
|
|
|
|
def self.convert_vimeo_iframes(doc)
|
|
doc
|
|
.css("iframe[src*='player.vimeo.com']")
|
|
.each do |iframe|
|
|
if iframe["data-original-href"].present?
|
|
vimeo_url = UrlHelper.normalized_encode(iframe["data-original-href"])
|
|
else
|
|
vimeo_id = iframe["src"].split("/").last.sub("?h=", "/")
|
|
vimeo_url = "https://vimeo.com/#{vimeo_id}"
|
|
end
|
|
iframe.replace Nokogiri::HTML5.fragment("<p><a href='#{vimeo_url}'>#{vimeo_url}</a></p>")
|
|
end
|
|
end
|
|
|
|
def self.strip_secure_uploads(doc)
|
|
# images inside a lightbox or other link
|
|
doc
|
|
.css("a[href]")
|
|
.each do |a|
|
|
next if !Upload.secure_uploads_url?(a["href"])
|
|
|
|
non_image_media = %w[video audio].include?(a&.parent&.name)
|
|
target = non_image_media ? a.parent : a
|
|
if target.to_s.include?("stripped-secure-view-media") ||
|
|
target.to_s.include?("stripped-secure-view-upload")
|
|
next
|
|
end
|
|
|
|
next if a.css("img[src]").empty? && !non_image_media
|
|
|
|
if a.classes.include?("lightbox")
|
|
img = a.css("img[src]").first
|
|
srcset = img&.attributes["srcset"]&.value
|
|
if srcset
|
|
# if available, use the first image from the srcset here
|
|
# so we get the optimized image instead of the possibly huge original
|
|
url = srcset.split(",").first
|
|
else
|
|
url = img["src"]
|
|
end
|
|
a.add_next_sibling secure_uploads_placeholder(
|
|
doc,
|
|
url,
|
|
width: img["width"],
|
|
height: img["height"],
|
|
)
|
|
a.remove
|
|
else
|
|
width = non_image_media ? nil : a.at_css("img").attr("width")
|
|
height = non_image_media ? nil : a.at_css("img").attr("height")
|
|
target.add_next_sibling secure_uploads_placeholder(
|
|
doc,
|
|
a["href"],
|
|
width: width,
|
|
height: height,
|
|
)
|
|
target.remove
|
|
end
|
|
end
|
|
|
|
# images by themselves or inside a onebox
|
|
doc
|
|
.css("img[src]")
|
|
.each do |img|
|
|
url =
|
|
if img.parent.classes.include?("aspect-image") && img.attributes["srcset"].present?
|
|
# we are using the first image from the srcset here so we get the
|
|
# optimized image instead of the original, because an optimized
|
|
# image may be used for the onebox thumbnail
|
|
srcset = img.attributes["srcset"].value
|
|
srcset.split(",").first
|
|
else
|
|
img["src"]
|
|
end
|
|
|
|
width = img["width"]
|
|
height = img["height"]
|
|
onebox_type = nil
|
|
|
|
if img.ancestors.css(".onebox-body").any?
|
|
if img.classes.include?("onebox-avatar-inline")
|
|
onebox_type = "avatar-inline"
|
|
else
|
|
onebox_type = "thumbnail"
|
|
end
|
|
end
|
|
|
|
# we always want this to be tiny and without any special styles
|
|
if img.classes.include?("site-icon")
|
|
onebox_type = nil
|
|
width = 16
|
|
height = 16
|
|
end
|
|
|
|
if Upload.secure_uploads_url?(url)
|
|
img.add_next_sibling secure_uploads_placeholder(
|
|
doc,
|
|
url,
|
|
onebox_type: onebox_type,
|
|
width: width,
|
|
height: height,
|
|
)
|
|
img.remove
|
|
end
|
|
end
|
|
end
|
|
|
|
def self.secure_uploads_placeholder(doc, url, onebox_type: false, width: nil, height: nil)
|
|
data_width = width ? "data-width=#{width}" : ""
|
|
data_height = height ? "data-height=#{height}" : ""
|
|
data_onebox_type = onebox_type ? "data-onebox-type='#{onebox_type}'" : ""
|
|
<<~HTML
|
|
<div class="secure-upload-notice" data-stripped-secure-upload="#{url}" #{data_onebox_type} #{data_width} #{data_height}>
|
|
#{I18n.t("emails.secure_uploads_placeholder")} <a class='stripped-secure-view-upload' href="#{url}">#{I18n.t("emails.view_redacted_media")}</a>.
|
|
</div>
|
|
HTML
|
|
end
|
|
|
|
def self.format_for_email(html, post = nil)
|
|
doc = Nokogiri::HTML5.fragment(html)
|
|
DiscourseEvent.trigger(:reduce_cooked, doc, post)
|
|
strip_secure_uploads(doc) if post&.with_secure_uploads?
|
|
strip_image_wrapping(doc)
|
|
convert_vimeo_iframes(doc)
|
|
make_all_links_absolute(doc)
|
|
doc.to_html
|
|
end
|
|
|
|
protected
|
|
|
|
class JavaScriptError < StandardError
|
|
attr_accessor :message, :backtrace
|
|
|
|
def initialize(message, backtrace)
|
|
@message = message
|
|
@backtrace = backtrace
|
|
end
|
|
end
|
|
|
|
def self.protect
|
|
rval = nil
|
|
@mutex.synchronize { rval = yield }
|
|
rval
|
|
end
|
|
|
|
def self.ctx_load(ctx, *files)
|
|
files.each { |file| ctx.load(app_root + file) }
|
|
end
|
|
|
|
private
|
|
|
|
USER_TYPE ||= "user"
|
|
GROUP_TYPE ||= "group"
|
|
GROUP_MENTIONABLE_TYPE ||= "group-mentionable"
|
|
|
|
def self.add_mentions(doc, user_id: nil)
|
|
elements = doc.css("span.mention")
|
|
names = elements.map { |element| element.text[1..-1] }
|
|
|
|
mentions = lookup_mentions(names, user_id: user_id)
|
|
|
|
elements.each do |element|
|
|
name = element.text[1..-1]
|
|
name.downcase!
|
|
|
|
if type = mentions[name]
|
|
element.name = "a"
|
|
|
|
element.children = PrettyText::Helpers.format_username(element.children.text)
|
|
|
|
case type
|
|
when USER_TYPE
|
|
element["href"] = "#{Discourse.base_path}/u/#{UrlHelper.encode_component(name)}"
|
|
when GROUP_MENTIONABLE_TYPE
|
|
element["class"] = "mention-group notify"
|
|
element["href"] = "#{Discourse.base_path}/groups/#{UrlHelper.encode_component(name)}"
|
|
when GROUP_TYPE
|
|
element["class"] = "mention-group"
|
|
element["href"] = "#{Discourse.base_path}/groups/#{UrlHelper.encode_component(name)}"
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
def self.lookup_mentions(names, user_id: nil)
|
|
return {} if names.blank?
|
|
|
|
sql = <<~SQL
|
|
(
|
|
SELECT
|
|
:user_type AS type,
|
|
username_lower AS name
|
|
FROM users
|
|
WHERE username_lower IN (:names) AND staged = false
|
|
)
|
|
UNION
|
|
(
|
|
SELECT
|
|
:group_type AS type,
|
|
lower(name) AS name
|
|
FROM groups
|
|
)
|
|
UNION
|
|
(
|
|
SELECT
|
|
:group_mentionable_type AS type,
|
|
lower(name) AS name
|
|
FROM groups
|
|
WHERE lower(name) IN (:names) AND (#{Group.mentionable_sql_clause(include_public: false)})
|
|
)
|
|
ORDER BY type
|
|
SQL
|
|
|
|
user = User.find_by(id: user_id)
|
|
names.each(&:downcase!)
|
|
|
|
results =
|
|
DB.query(
|
|
sql,
|
|
names: names,
|
|
user_type: USER_TYPE,
|
|
group_type: GROUP_TYPE,
|
|
group_mentionable_type: GROUP_MENTIONABLE_TYPE,
|
|
levels: Group.alias_levels(user),
|
|
user_id: user_id,
|
|
)
|
|
|
|
mentions = {}
|
|
results.each { |result| mentions[result.name] = result.type }
|
|
mentions
|
|
end
|
|
|
|
def self.allowed_src_pattern
|
|
allowed_src_prefixes = [
|
|
Discourse.base_path,
|
|
Discourse.base_url,
|
|
GlobalSetting.s3_cdn_url,
|
|
GlobalSetting.cdn_url,
|
|
SiteSetting.external_emoji_url.presence,
|
|
*SiteSetting.block_hotlinked_media_exceptions.split("|"),
|
|
]
|
|
|
|
patterns =
|
|
allowed_src_prefixes.compact.map do |url|
|
|
pattern = Regexp.escape(url)
|
|
|
|
# If 'https://example.com' is allowed, ensure 'https://example.com.blah.com' is not
|
|
pattern += '(?:/|\z)' if !pattern.ends_with?("\/")
|
|
|
|
pattern
|
|
end
|
|
|
|
/\A(data:|#{patterns.join("|")})/
|
|
end
|
|
end
|