You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
73 lines
2.6 KiB
73 lines
2.6 KiB
# frozen_string_literal: true
|
|
|
|
class FetchLinkCardService < BaseService
|
|
include HttpHelper
|
|
|
|
URL_PATTERN = %r{https?://\S+}
|
|
|
|
def call(status)
|
|
# Get first http/https URL that isn't local
|
|
url = status.text.match(URL_PATTERN).to_a.reject { |uri| TagManager.instance.local_url?(uri) }.first
|
|
|
|
return if url.nil?
|
|
|
|
card = PreviewCard.where(status: status).first_or_initialize(status: status, url: url)
|
|
attempt_opengraph(card, url) unless attempt_oembed(card, url)
|
|
end
|
|
|
|
private
|
|
|
|
def attempt_oembed(card, url)
|
|
response = OEmbed::Providers.get(url)
|
|
|
|
card.type = response.type
|
|
card.title = response.respond_to?(:title) ? response.title : ''
|
|
card.author_name = response.respond_to?(:author_name) ? response.author_name : ''
|
|
card.author_url = response.respond_to?(:author_url) ? response.author_url : ''
|
|
card.provider_name = response.respond_to?(:provider_name) ? response.provider_name : ''
|
|
card.provider_url = response.respond_to?(:provider_url) ? response.provider_url : ''
|
|
card.width = 0
|
|
card.height = 0
|
|
|
|
case card.type
|
|
when 'link'
|
|
card.image = URI.parse(response.thumbnail_url) if response.respond_to?(:thumbnail_url)
|
|
when 'photo'
|
|
card.url = response.url
|
|
card.width = response.width.presence || 0
|
|
card.height = response.height.presence || 0
|
|
when 'video'
|
|
card.width = response.width.presence || 0
|
|
card.height = response.height.presence || 0
|
|
card.html = Formatter.instance.sanitize(response.html, Sanitize::Config::MASTODON_OEMBED)
|
|
when 'rich'
|
|
# Most providers rely on <script> tags, which is a no-no
|
|
return false
|
|
end
|
|
|
|
card.save_with_optional_image!
|
|
rescue OEmbed::NotFound
|
|
false
|
|
end
|
|
|
|
def attempt_opengraph(card, url)
|
|
response = http_client.get(url)
|
|
|
|
return if response.code != 200 || response.mime_type != 'text/html'
|
|
|
|
page = Nokogiri::HTML(response.to_s)
|
|
|
|
card.type = :link
|
|
card.title = meta_property(page, 'og:title') || page.at_xpath('//title')&.content
|
|
card.description = meta_property(page, 'og:description') || meta_property(page, 'description')
|
|
card.image = URI.parse(Addressable::URI.parse(meta_property(page, 'og:image')).normalize.to_s) if meta_property(page, 'og:image')
|
|
|
|
return if card.title.blank?
|
|
|
|
card.save_with_optional_image!
|
|
end
|
|
|
|
def meta_property(html, property)
|
|
html.at_xpath("//meta[@property=\"#{property}\"]")&.attribute('content')&.value || html.at_xpath("//meta[@name=\"#{property}\"]")&.attribute('content')&.value
|
|
end
|
|
end
|
|
|