Class: Jobs::PullHotlinkedImages
- Inherits:
-
Base
- Object
- Base
- Jobs::PullHotlinkedImages
show all
- Defined in:
- app/jobs/regular/pull_hotlinked_images.rb
Defined Under Namespace
Classes: ImageBrokenError, ImageTooLargeError, UploadCreateError
Instance Method Summary
collapse
Methods inherited from Base
acquire_cluster_concurrency_lock!, clear_cluster_concurrency_lock!, cluster_concurrency, cluster_concurrency_redis_key, delayed_perform, #error_context, get_cluster_concurrency, #last_db_duration, #perform, #perform_immediately
Constructor Details
Returns a new instance of PullHotlinkedImages.
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# File 'app/jobs/regular/pull_hotlinked_images.rb', line 7
def initialize
@max_size = SiteSetting.max_image_size_kb.kilobytes
end
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Instance Method Details
#attempt_download(src, user_id) ⇒ Object
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# File 'app/jobs/regular/pull_hotlinked_images.rb', line 120
def attempt_download(src, user_id)
src = Upload.signed_url_from_secure_uploads_url(src) if Upload.secure_uploads_url?(src)
hotlinked = download(src)
raise ImageBrokenError if !hotlinked
raise ImageTooLargeError if File.size(hotlinked.path) > @max_size
filename = File.basename(URI.parse(src).path)
filename << File.extname(hotlinked.path) unless filename["."]
upload = UploadCreator.new(hotlinked, filename, origin: src).create_for(user_id)
if upload.persisted?
upload
else
log(
:info,
"Failed to persist downloaded hotlinked image for post: #{@post_id}: #{src} - #{upload.errors.full_messages.join("\n")}",
)
raise UploadCreateError
end
end
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#download(src) ⇒ Object
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# File 'app/jobs/regular/pull_hotlinked_images.rb', line 80
def download(src)
downloaded = nil
begin
retries ||= 3
if SiteSetting.verbose_upload_logging
Rails.logger.warn("Verbose Upload Logging: Downloading hotlinked image from #{src}")
end
downloaded =
FileHelper.download(
src,
max_file_size: @max_size,
retain_on_max_file_size_exceeded: true,
tmp_file_name: "discourse-hotlinked",
follow_redirect: true,
read_timeout: 15,
)
rescue => e
if SiteSetting.verbose_upload_logging
Rails.logger.warn("Verbose Upload Logging: Error '#{e.message}' while downloading #{src}")
end
if (retries -= 1) > 0 && !Rails.env.test?
sleep 1
retry
end
end
downloaded
end
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#execute(args) ⇒ Object
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# File 'app/jobs/regular/pull_hotlinked_images.rb', line 11
def execute(args)
disable_if_low_on_disk_space
@post_id = args[:post_id]
raise Discourse::InvalidParameters.new(:post_id) if @post_id.blank?
post = Post.find_by(id: @post_id)
return if post.nil? || post.topic.nil?
hotlinked_map = post.post_hotlinked_media.map { |r| [r.url, r] }.to_h
changed_hotlink_records = false
(post.cooked).each do |node|
download_src =
original_src = node["src"] || node[PrettyText::BLOCKED_HOTLINKED_SRC_ATTR] || node["href"]
download_src = replace_encoded_src(download_src)
download_src =
"#{SiteSetting.force_https ? "https" : "http"}:#{original_src}" if original_src.start_with?(
"//",
)
normalized_src = normalize_src(download_src)
next if !should_download_image?(download_src, post)
hotlink_record = hotlinked_map[normalized_src]
if hotlink_record.nil?
hotlinked_map[normalized_src] = hotlink_record =
PostHotlinkedMedia.new(post: post, url: normalized_src)
begin
hotlink_record.upload = attempt_download(download_src, post.user_id)
hotlink_record.status = :downloaded
rescue ImageTooLargeError
hotlink_record.status = :too_large
rescue ImageBrokenError
hotlink_record.status = :download_failed
rescue UploadCreateError
hotlink_record.status = :upload_create_failed
end
end
if hotlink_record.changed?
changed_hotlink_records = true
hotlink_record.save!
end
rescue => e
raise e if Rails.env.test?
log(
:error,
"Failed to pull hotlinked image (#{download_src}) post: #{@post_id}\n" + e.message +
"\n" + e.backtrace.join("\n"),
)
end
if changed_hotlink_records
post.trigger_post_process(
bypass_bump: true,
skip_pull_hotlinked_images: true, )
end
if hotlinked_map.size > 0
Jobs.cancel_scheduled_job(:update_hotlinked_raw, post_id: post.id)
update_raw_delay = SiteSetting.editing_grace_period + 1
Jobs.enqueue_in(update_raw_delay, :update_hotlinked_raw, post_id: post.id)
end
end
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# File 'app/jobs/regular/pull_hotlinked_images.rb', line 144
def (html)
doc = Nokogiri::HTML5.fragment(html)
doc.css("img[src], [#{PrettyText::BLOCKED_HOTLINKED_SRC_ATTR}], a.lightbox[href]") -
doc.css("img.avatar") - doc.css(".lightbox img[src]")
end
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#log(log_level, message) ⇒ Object
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# File 'app/jobs/regular/pull_hotlinked_images.rb', line 193
def log(log_level, message)
Rails.logger.public_send(
log_level,
"#{RailsMultisite::ConnectionManagement.current_db}: #{message}",
)
end
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#should_download_image?(src, post = nil) ⇒ Boolean
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# File 'app/jobs/regular/pull_hotlinked_images.rb', line 151
def should_download_image?(src, post = nil)
return false unless src.present?
local_bases =
[Discourse.base_url, Discourse.asset_host, SiteSetting.external_emoji_url.presence].compact
.map { |s| normalize_src(s) }
if Discourse.store.has_been_uploaded?(src) || normalize_src(src).start_with?(*local_bases) ||
src =~ %r{\A/[^/]}i
return false if !(src =~ %r{/uploads/} || Upload.secure_uploads_url?(src))
upload = Upload.consider_for_reuse(Upload.get_from_url(src), post)
return !upload.present?
end
return false unless SiteSetting.download_remote_images_to_local?
begin
uri = URI.parse(src)
rescue URI::Error
return false
end
hostname = uri.hostname
return false unless hostname
SiteSetting.should_download_images?(src)
end
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