mirror of
https://github.com/discourse/discourse.git
synced 2024-11-25 18:13:38 +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
86 lines
1.8 KiB
Ruby
86 lines
1.8 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require_dependency 'retrieve_title'
|
|
|
|
class InlineOneboxer
|
|
|
|
MIN_TITLE_LENGTH = 2
|
|
|
|
def initialize(urls, opts = nil)
|
|
@urls = urls
|
|
@opts = opts || {}
|
|
end
|
|
|
|
def process
|
|
@urls.map { |url| InlineOneboxer.lookup(url, @opts) }.compact
|
|
end
|
|
|
|
def self.purge(url)
|
|
Rails.cache.delete(cache_key(url))
|
|
end
|
|
|
|
def self.cache_lookup(url)
|
|
Rails.cache.read(cache_key(url))
|
|
end
|
|
|
|
def self.lookup(url, opts = nil)
|
|
opts ||= {}
|
|
opts = opts.with_indifferent_access
|
|
|
|
unless opts[:skip_cache] || opts[:invalidate]
|
|
cached = cache_lookup(url)
|
|
return cached if cached.present?
|
|
end
|
|
|
|
return unless url
|
|
|
|
if route = Discourse.route_for(url)
|
|
if route[:controller] == "topics" &&
|
|
route[:action] == "show" &&
|
|
topic = Topic.where(id: route[:topic_id].to_i).first
|
|
|
|
return onebox_for(url, topic.title, opts) if Guardian.new.can_see?(topic)
|
|
end
|
|
end
|
|
|
|
always_allow = SiteSetting.enable_inline_onebox_on_all_domains
|
|
domains = SiteSetting.inline_onebox_domains_whitelist&.split('|') unless always_allow
|
|
|
|
if always_allow || domains
|
|
uri = begin
|
|
URI(url)
|
|
rescue URI::Error
|
|
end
|
|
|
|
if uri.present? &&
|
|
uri.hostname.present? &&
|
|
(always_allow || domains.include?(uri.hostname))
|
|
title = RetrieveTitle.crawl(url)
|
|
title = nil if title && title.length < MIN_TITLE_LENGTH
|
|
return onebox_for(url, title, opts)
|
|
end
|
|
end
|
|
|
|
nil
|
|
end
|
|
|
|
private
|
|
|
|
def self.onebox_for(url, title, opts)
|
|
onebox = {
|
|
url: url,
|
|
title: title && Emoji.gsub_emoji_to_unicode(title)
|
|
}
|
|
unless opts[:skip_cache]
|
|
Rails.cache.write(cache_key(url), onebox, expires_in: 1.day)
|
|
end
|
|
|
|
onebox
|
|
end
|
|
|
|
def self.cache_key(url)
|
|
"inline_onebox:#{url}"
|
|
end
|
|
|
|
end
|