mirror of
https://github.com/discourse/discourse.git
synced 2024-11-23 03:16:41 +08:00
30990006a9
This reduces chances of errors where consumers of strings mutate inputs and reduces memory usage of the app. Test suite passes now, but there may be some stuff left, so we will run a few sites on a branch prior to merging
296 lines
8.5 KiB
Ruby
296 lines
8.5 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require 'uri'
|
|
require_dependency "onebox/discourse_onebox_sanitize_config"
|
|
require_dependency 'final_destination'
|
|
|
|
Dir["#{Rails.root}/lib/onebox/engine/*_onebox.rb"].sort.each { |f| require f }
|
|
|
|
module Oneboxer
|
|
ONEBOX_CSS_CLASS = "onebox"
|
|
|
|
# keep reloaders happy
|
|
unless defined? Oneboxer::Result
|
|
Result = Struct.new(:doc, :changed) do
|
|
def to_html
|
|
doc.to_html
|
|
end
|
|
|
|
def changed?
|
|
changed
|
|
end
|
|
end
|
|
end
|
|
|
|
def self.ignore_redirects
|
|
@ignore_redirects ||= ['http://www.dropbox.com', 'http://store.steampowered.com', Discourse.base_url]
|
|
end
|
|
|
|
def self.force_get_hosts
|
|
@force_get_hosts ||= ['http://us.battle.net']
|
|
end
|
|
|
|
def self.allowed_post_types
|
|
@allowed_post_types ||= [Post.types[:regular], Post.types[:moderator_action]]
|
|
end
|
|
|
|
def self.preview(url, options = nil)
|
|
options ||= {}
|
|
invalidate(url) if options[:invalidate_oneboxes]
|
|
onebox_raw(url, options)[:preview]
|
|
end
|
|
|
|
def self.onebox(url, options = nil)
|
|
options ||= {}
|
|
invalidate(url) if options[:invalidate_oneboxes]
|
|
onebox_raw(url, options)[:onebox]
|
|
end
|
|
|
|
def self.cached_onebox(url)
|
|
if c = Rails.cache.read(onebox_cache_key(url))
|
|
c[:onebox]
|
|
end
|
|
rescue => e
|
|
invalidate(url)
|
|
Rails.logger.warn("invalid cached onebox for #{url} #{e}")
|
|
""
|
|
end
|
|
|
|
def self.cached_preview(url)
|
|
if c = Rails.cache.read(onebox_cache_key(url))
|
|
c[:preview]
|
|
end
|
|
rescue => e
|
|
invalidate(url)
|
|
Rails.logger.warn("invalid cached preview for #{url} #{e}")
|
|
""
|
|
end
|
|
|
|
def self.invalidate(url)
|
|
Rails.cache.delete(onebox_cache_key(url))
|
|
end
|
|
|
|
# Parse URLs out of HTML, returning the document when finished.
|
|
def self.each_onebox_link(string_or_doc, extra_paths: [])
|
|
doc = string_or_doc
|
|
doc = Nokogiri::HTML::fragment(doc) if doc.is_a?(String)
|
|
|
|
onebox_links = doc.css("a.#{ONEBOX_CSS_CLASS}", *extra_paths)
|
|
if onebox_links.present?
|
|
onebox_links.each do |link|
|
|
yield(link['href'], link) if link['href'].present?
|
|
end
|
|
end
|
|
|
|
doc
|
|
end
|
|
|
|
HTML5_BLOCK_ELEMENTS ||= %w{address article aside blockquote canvas center dd div dl dt fieldset figcaption figure footer form h1 h2 h3 h4 h5 h6 header hgroup hr li main nav noscript ol output p pre section table tfoot ul video}
|
|
|
|
def self.apply(string_or_doc, extra_paths: nil)
|
|
doc = string_or_doc
|
|
doc = Nokogiri::HTML::fragment(doc) if doc.is_a?(String)
|
|
changed = false
|
|
|
|
each_onebox_link(doc, extra_paths: extra_paths) do |url, element|
|
|
onebox, _ = yield(url, element)
|
|
|
|
if onebox
|
|
parsed_onebox = Nokogiri::HTML::fragment(onebox)
|
|
next unless parsed_onebox.children.count > 0
|
|
|
|
if element&.parent&.node_name&.downcase == "p" &&
|
|
element.parent.children.count == 1 &&
|
|
HTML5_BLOCK_ELEMENTS.include?(parsed_onebox.children[0].node_name.downcase)
|
|
element = element.parent
|
|
end
|
|
|
|
changed = true
|
|
element.swap parsed_onebox.to_html
|
|
end
|
|
end
|
|
|
|
# strip empty <p> elements
|
|
doc.css("p").each { |p| p.remove if p.children.empty? }
|
|
|
|
Result.new(doc, changed)
|
|
end
|
|
|
|
def self.is_previewing?(user_id)
|
|
$redis.get(preview_key(user_id)) == "1"
|
|
end
|
|
|
|
def self.preview_onebox!(user_id)
|
|
$redis.setex(preview_key(user_id), 1.minute, "1")
|
|
end
|
|
|
|
def self.onebox_previewed!(user_id)
|
|
$redis.del(preview_key(user_id))
|
|
end
|
|
|
|
def self.engine(url)
|
|
Onebox::Matcher.new(url).oneboxed
|
|
end
|
|
|
|
private
|
|
|
|
def self.preview_key(user_id)
|
|
"onebox:preview:#{user_id}"
|
|
end
|
|
|
|
def self.blank_onebox
|
|
{ preview: "", onebox: "" }
|
|
end
|
|
|
|
def self.onebox_cache_key(url)
|
|
"onebox__#{url}"
|
|
end
|
|
|
|
def self.onebox_raw(url, opts = {})
|
|
url = URI(url).to_s
|
|
local_onebox(url, opts) || external_onebox(url)
|
|
rescue => e
|
|
# no point warning here, just cause we have an issue oneboxing a url
|
|
# we can later hunt for failed oneboxes by searching logs if needed
|
|
Rails.logger.info("Failed to onebox #{url} #{e} #{e.backtrace}")
|
|
# return a blank hash, so rest of the code works
|
|
blank_onebox
|
|
end
|
|
|
|
def self.local_onebox(url, opts = {})
|
|
return unless route = Discourse.route_for(url)
|
|
|
|
html =
|
|
case route[:controller]
|
|
when "uploads" then local_upload_html(url)
|
|
when "topics" then local_topic_html(url, route, opts)
|
|
when "users" then local_user_html(url, route)
|
|
end
|
|
|
|
html = html.presence || "<a href='#{url}'>#{url}</a>"
|
|
{ onebox: html, preview: html }
|
|
end
|
|
|
|
def self.local_upload_html(url)
|
|
case File.extname(URI(url).path || "")
|
|
when /^\.(mov|mp4|webm|ogv)$/i
|
|
"<video width='100%' height='100%' controls><source src='#{url}'><a href='#{url}'>#{url}</a></video>"
|
|
when /^\.(mp3|ogg|wav|m4a)$/i
|
|
"<audio controls><source src='#{url}'><a href='#{url}'>#{url}</a></audio>"
|
|
end
|
|
end
|
|
|
|
def self.local_topic_html(url, route, opts)
|
|
return unless current_user = User.find_by(id: opts[:user_id])
|
|
|
|
if current_category = Category.find_by(id: opts[:category_id])
|
|
return unless Guardian.new(current_user).can_see_category?(current_category)
|
|
end
|
|
|
|
if current_topic = Topic.find_by(id: opts[:topic_id])
|
|
return unless Guardian.new(current_user).can_see_topic?(current_topic)
|
|
end
|
|
|
|
topic = Topic.find_by(id: route[:topic_id])
|
|
|
|
return unless topic
|
|
return if topic.private_message?
|
|
|
|
if current_category&.id != topic.category_id
|
|
return unless Guardian.new.can_see_topic?(topic)
|
|
end
|
|
|
|
post_number = route[:post_number].to_i
|
|
|
|
post = post_number > 1 ?
|
|
topic.posts.where(post_number: post_number).first :
|
|
topic.ordered_posts.first
|
|
|
|
return if !post || post.hidden || !allowed_post_types.include?(post.post_type)
|
|
|
|
if post_number > 1 && current_topic&.id == topic.id
|
|
excerpt = post.excerpt(SiteSetting.post_onebox_maxlength)
|
|
excerpt.gsub!(/[\r\n]+/, " ")
|
|
excerpt.gsub!("[/quote]", "[quote]") # don't break my quote
|
|
|
|
quote = "[quote=\"#{post.user.username}, topic:#{topic.id}, post:#{post.post_number}\"]\n#{excerpt}\n[/quote]"
|
|
|
|
PrettyText.cook(quote)
|
|
else
|
|
args = {
|
|
topic_id: topic.id,
|
|
post_number: post.post_number,
|
|
avatar: PrettyText.avatar_img(post.user.avatar_template, "tiny"),
|
|
original_url: url,
|
|
title: PrettyText.unescape_emoji(CGI::escapeHTML(topic.title)),
|
|
category_html: CategoryBadge.html_for(topic.category),
|
|
quote: PrettyText.unescape_emoji(post.excerpt(SiteSetting.post_onebox_maxlength)),
|
|
}
|
|
|
|
template = File.read("#{Rails.root}/lib/onebox/templates/discourse_topic_onebox.hbs")
|
|
Mustache.render(template, args)
|
|
end
|
|
end
|
|
|
|
def self.local_user_html(url, route)
|
|
username = route[:username] || ""
|
|
|
|
if user = User.find_by(username_lower: username.downcase)
|
|
|
|
name = user.name if SiteSetting.enable_names
|
|
|
|
args = {
|
|
user_id: user.id,
|
|
username: user.username,
|
|
avatar: PrettyText.avatar_img(user.avatar_template, "extra_large"),
|
|
name: name,
|
|
bio: user.user_profile.bio_excerpt(230),
|
|
location: user.user_profile.location,
|
|
joined: I18n.t('joined'),
|
|
created_at: user.created_at.strftime(I18n.t('datetime_formats.formats.date_only')),
|
|
website: user.user_profile.website,
|
|
website_name: UserSerializer.new(user).website_name,
|
|
original_url: url
|
|
}
|
|
|
|
template = File.read("#{Rails.root}/lib/onebox/templates/discourse_user_onebox.hbs")
|
|
Mustache.render(template, args)
|
|
else
|
|
nil
|
|
end
|
|
end
|
|
|
|
def self.blacklisted_domains
|
|
SiteSetting.onebox_domains_blacklist.split("|")
|
|
end
|
|
|
|
def self.preserve_fragment_url_hosts
|
|
@preserve_fragment_url_hosts ||= ['http://github.com']
|
|
end
|
|
|
|
def self.external_onebox(url)
|
|
Rails.cache.fetch(onebox_cache_key(url), expires_in: 1.day) do
|
|
fd = FinalDestination.new(url, ignore_redirects: ignore_redirects, ignore_hostnames: blacklisted_domains, force_get_hosts: force_get_hosts, preserve_fragment_url_hosts: preserve_fragment_url_hosts)
|
|
uri = fd.resolve
|
|
return blank_onebox if uri.blank? || blacklisted_domains.map { |hostname| uri.hostname.match?(hostname) }.any?
|
|
|
|
options = {
|
|
cache: {},
|
|
max_width: 695,
|
|
sanitize_config: Sanitize::Config::DISCOURSE_ONEBOX
|
|
}
|
|
|
|
options[:cookie] = fd.cookie if fd.cookie
|
|
|
|
if Rails.env.development? && SiteSetting.port.to_i > 0
|
|
Onebox.options = { allowed_ports: [80, 443, SiteSetting.port.to_i] }
|
|
end
|
|
|
|
r = Onebox.preview(uri.to_s, options)
|
|
|
|
{ onebox: r.to_s, preview: r&.placeholder_html.to_s }
|
|
end
|
|
end
|
|
|
|
end
|