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DEV: Move hotlinked image information into a dedicated table (#16585) 

This will make future changes to the 'pull hotlinked images' system easier. This commit should not introduce any functional change.

For now, the old post_custom_field data is kept in the database. This will be dropped in a future commit.
This commit is contained in:
David Taylor 2022-05-03 13:53:32 +01:00 committed by GitHub
parent d8ce4228da
commit c1db968740
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GPG Key ID: 4AEE18F83AFDEB23
9 changed files with 164 additions and 58 deletions
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66
app/jobs/regular/pull_hotlinked_images.rb
View File

@ -21,15 +21,9 @@ module Jobs
raw = post.raw.dup
start_raw = raw.dup
large_image_urls = post.custom_fields[Post::LARGE_IMAGES] || []
broken_image_urls = post.custom_fields[Post::BROKEN_IMAGES] || []
downloaded_image_ids = post.custom_fields[Post::DOWNLOADED_IMAGES] || {}
hotlinked_map = post.post_hotlinked_media.map { |r| [r.url, r] }.to_h
upload_records = Upload.where(id: downloaded_image_ids.values)
upload_records = Hash[upload_records.map { |u| [u.id, u] }]
downloaded_images = {}
downloaded_image_ids.each { |url, id| downloaded_images[url] = upload_records[id] }
changed_hotlink_records = false
extract_images_from(post.cooked).each do |node|
download_src = original_src = node['src'] || node['href']
@ -38,19 +32,32 @@ module Jobs
next if !should_download_image?(download_src, post)
begin
already_attempted_download = downloaded_images.include?(normalized_src) || large_image_urls.include?(normalized_src) || broken_image_urls.include?(normalized_src)
if !already_attempted_download
downloaded_images[normalized_src] = attempt_download(download_src, post.user_id)
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
rescue ImageTooLargeError
large_image_urls << normalized_src
rescue ImageBrokenError
broken_image_urls << normalized_src
end
if hotlink_record.changed?
changed_hotlink_records = true
hotlink_record.save!
end
# have we successfully downloaded that file?
if upload = downloaded_images[normalized_src]
if upload = hotlink_record&.upload
raw = replace_in_raw(original_src: original_src, upload: upload, raw: raw)
end
rescue => e
@ -58,26 +65,6 @@ module Jobs
log(:error, "Failed to pull hotlinked image (#{download_src}) post: #{@post_id}\n" + e.message + "\n" + e.backtrace.join("\n"))
end
large_image_urls.uniq!
broken_image_urls.uniq!
downloaded_images.compact!
post.custom_fields[Post::LARGE_IMAGES] = large_image_urls
post.custom_fields[Post::BROKEN_IMAGES] = broken_image_urls
downloaded_image_ids = {}
downloaded_images.each { |url, upload| downloaded_image_ids[url] = upload.id }
post.custom_fields[Post::DOWNLOADED_IMAGES] = downloaded_image_ids
[Post::LARGE_IMAGES, Post::BROKEN_IMAGES, Post::DOWNLOADED_IMAGES].each do |key|
post.custom_fields.delete(key) if !post.custom_fields[key].present?
end
custom_fields_updated = !post.custom_fields_clean?
# only save custom fields if they changed
post.save_custom_fields if custom_fields_updated
# If post changed while we were downloading images, never apply edits
post.reload
post_changed_elsewhere = (start_raw != post.raw)
@ -86,7 +73,7 @@ module Jobs
if !post_changed_elsewhere && raw_changed_here
changes = { raw: raw, edit_reason: I18n.t("upload.edit_reason") }
post.revise(Discourse.system_user, changes, bypass_bump: true, skip_staff_log: true)
elsif custom_fields_updated
elsif changed_hotlink_records
post.trigger_post_process(
bypass_bump: true,
skip_pull_hotlinked_images: true # Avoid an infinite loop of job scheduling
@ -127,6 +114,7 @@ module Jobs
class ImageTooLargeError < StandardError; end
class ImageBrokenError < StandardError; end
class UploadCreateError < StandardError; end
def attempt_download(src, user_id)
# secure-media-uploads endpoint prevents anonymous downloads, so we
@ -145,7 +133,7 @@ module Jobs
upload
else
log(:info, "Failed to persist downloaded hotlinked image for post: #{@post_id}: #{src} - #{upload.errors.full_messages.join("\n")}")
nil
raise UploadCreateError
end
end

8
app/models/post.rb
View File

@ -62,6 +62,8 @@ class Post < ActiveRecord::Base
belongs_to :image_upload, class_name: "Upload"
has_many :post_hotlinked_media, dependent: :destroy, class_name: "PostHotlinkedMedia"
validates_with PostValidator, unless: :skip_validation
after_commit :index_search
@ -78,6 +80,8 @@ class Post < ActiveRecord::Base
SHORT_POST_CHARS ||= 1200
# TODO: Drop the data from these three custom fields,
# drop the indexes, and remove the relavent constants
register_custom_field_type(LARGE_IMAGES, :json)
register_custom_field_type(BROKEN_IMAGES, :json)
register_custom_field_type(DOWNLOADED_IMAGES, :json)
@ -714,8 +718,8 @@ class Post < ActiveRecord::Base
end
if invalidate_broken_images
custom_fields.delete(BROKEN_IMAGES)
save_custom_fields
post_hotlinked_media.download_failed.destroy_all
post_hotlinked_media.upload_create_failed.destroy_all
end
# Extracts urls from the body

29
app/models/post_hotlinked_media.rb Normal file
View File

@ -0,0 +1,29 @@
# frozen_string_literal: true
class PostHotlinkedMedia < ActiveRecord::Base
belongs_to :post
belongs_to :upload
enum status: {
downloaded: "downloaded",
too_large: "too_large",
download_failed: "download_failed",
upload_create_failed: "upload_create_failed"
}
end
# == Schema Information
#
# Table name: post_hotlinked_media
#
# id :bigint not null, primary key
# post_id :bigint not null
# url :string not null
# status :enum not null
# upload_id :bigint
# created_at :datetime not null
# updated_at :datetime not null
#
# Indexes
#
# index_post_hotlinked_media_on_post_id_and_url (post_id,url) UNIQUE
#

2
app/models/upload.rb
View File

@ -27,6 +27,8 @@ class Upload < ActiveRecord::Base
has_many :post_uploads, dependent: :destroy
has_many :posts, through: :post_uploads
has_many :post_hotlinked_media, dependent: :destroy, class_name: "PostHotlinkedMedia"
has_many :optimized_images, dependent: :destroy
has_many :user_uploads, dependent: :destroy
has_many :topic_thumbnails

75
db/migrate/20220428094026_create_post_hotlinked_media.rb Normal file
View File

@ -0,0 +1,75 @@
# frozen_string_literal: true
class CreatePostHotlinkedMedia < ActiveRecord::Migration[6.1]
def change
reversible do |dir|
dir.up do
execute <<~SQL
CREATE TYPE hotlinked_media_status AS ENUM('downloaded', 'too_large', 'download_failed', 'upload_create_failed')
SQL
end
dir.down do
execute <<~SQL
DROP TYPE hotlinked_media_status
SQL
end
end
create_table :post_hotlinked_media do |t|
t.bigint :post_id, null: false
t.string :url, null: false
t.column :status, :hotlinked_media_status, null: false
t.bigint :upload_id
t.timestamps
t.index [:post_id, :url], unique: true
end
reversible do |dir|
dir.up do
execute <<~SQL
INSERT INTO post_hotlinked_media (post_id, url, status, upload_id, created_at, updated_at)
SELECT
post_id,
obj.key AS url,
'downloaded',
obj.value::bigint AS upload_id,
pcf.created_at,
pcf.updated_at
FROM post_custom_fields pcf
JOIN json_each_text(pcf.value::json) obj ON true
JOIN uploads ON obj.value::bigint = uploads.id
WHERE name='downloaded_images'
SQL
execute <<~SQL
INSERT INTO post_hotlinked_media (post_id, url, status, upload_id, created_at, updated_at)
SELECT
post_id,
url.value,
'download_failed',
NULL,
pcf.created_at,
pcf.updated_at
FROM post_custom_fields pcf
JOIN json_array_elements_text(pcf.value::json) url ON true
WHERE name='broken_images'
SQL
execute <<~SQL
INSERT INTO post_hotlinked_media (post_id, url, status, upload_id, created_at, updated_at)
SELECT
post_id,
url.value,
'too_large',
NULL,
pcf.created_at,
pcf.updated_at
FROM post_custom_fields pcf
JOIN json_array_elements_text(pcf.value::json) url ON true
WHERE name='large_images'
SQL
end
end
end
end

6
lib/cooked_post_processor.rb
View File

@ -146,15 +146,15 @@ class CookedPostProcessor
end
def large_images
@large_images ||= @post&.custom_fields[Post::LARGE_IMAGES].presence || []
@large_images ||= @post&.post_hotlinked_media.select { |r| r.too_large? }.map(&:url)
end
def broken_images
@broken_images ||= @post&.custom_fields[Post::BROKEN_IMAGES].presence || []
@broken_images ||= @post&.post_hotlinked_media.select { |r| r.download_failed? }.map(&:url)
end
def downloaded_images
@downloaded_images ||= @post&.downloaded_images || []
@downloaded_images ||= @post&.post_hotlinked_media.select { |r| r.downloaded? }.map { |r| [r.url, r.upload_id] }.to_h
end
def convert_to_link!(img)

26
spec/lib/cooked_post_processor_spec.rb
View File

@ -1080,8 +1080,7 @@ describe CookedPostProcessor do
post = Fabricate(:post, raw: url)
upload.update!(url: "https://test.s3.amazonaws.com/something.png")
post.custom_fields[Post::DOWNLOADED_IMAGES] = { "//image.com/avatar.png": upload.id }
post.save_custom_fields
PostHotlinkedMedia.create!(url: "//image.com/avatar.png", post: post, status: 'downloaded', upload: upload)
cpp = CookedPostProcessor.new(post, invalidate_oneboxes: true)
stub_image_size(width: 100, height: 200)
@ -1113,8 +1112,7 @@ describe CookedPostProcessor do
post = Fabricate(:post, raw: url)
upload.update!(url: "https://test.s3.amazonaws.com/something.png")
post.custom_fields[Post::DOWNLOADED_IMAGES] = { "//image.com/avatar.png": upload.id }
post.save_custom_fields
PostHotlinkedMedia.create!(url: "//image.com/avatar.png", post: post, status: 'downloaded', upload: upload)
cooked_url = "https://localhost/secure-media-uploads/test.png"
UrlHelper.expects(:cook_url).with(upload.url, secure: true).returns(cooked_url)
@ -1137,8 +1135,7 @@ describe CookedPostProcessor do
post = Fabricate(:post, raw: url)
post.custom_fields[Post::LARGE_IMAGES] = ["//image.com/avatar.png"]
post.save_custom_fields
PostHotlinkedMedia.create!(url: "//image.com/avatar.png", post: post, status: 'too_large')
cpp = CookedPostProcessor.new(post, invalidate_oneboxes: true)
cpp.post_process
@ -1146,6 +1143,23 @@ describe CookedPostProcessor do
expect(cpp.doc.to_s).to match(/<div class="large-image-placeholder">/)
expect(cpp.doc.to_s).to include(I18n.t("upload.placeholders.too_large_humanized", max_size: "4 MB"))
end
it "replaces broken image placeholder" do
url = 'https://image.com/my-avatar'
image_url = 'https://image.com/avatar.png'
Oneboxer.stubs(:onebox).with(url, anything).returns("<img class='onebox' src='#{image_url}' />")
post = Fabricate(:post, raw: url)
PostHotlinkedMedia.create!(url: "//image.com/avatar.png", post: post, status: 'download_failed')
cpp = CookedPostProcessor.new(post, invalidate_oneboxes: true)
cpp.post_process
expect(cpp.doc.to_s).to have_tag("span.broken-image")
expect(cpp.doc.to_s).to include(I18n.t("post.image_placeholder.broken"))
end
end
context "#post_process_oneboxes removes nofollow if add_rel_nofollow_to_user_content is disabled" do

5
spec/models/post_spec.rb
View File

@ -1447,11 +1447,6 @@ describe Post do
context "#link_post_uploads" do
it "finds all the uploads in the post" do
post.custom_fields[Post::DOWNLOADED_IMAGES] = {
"/#{upload_path}/original/1X/1/1234567890123456.csv": attachment_upload.id
}
post.save_custom_fields
post.link_post_uploads
expect(PostUpload.where(post: post).pluck(:upload_id)).to contain_exactly(

5
spec/requests/posts_controller_spec.rb
View File

@ -793,11 +793,10 @@ describe PostsController do
it "will invalidate broken images cache" do
sign_in(moderator)
post.custom_fields[Post::BROKEN_IMAGES] = ["https://example.com/image.jpg"]
post.save_custom_fields
PostHotlinkedMedia.create!(url: "https://example.com/image.jpg", post: post, status: 'download_failed')
put "/posts/#{post.id}/rebake.json"
post.reload
expect(post.custom_fields[Post::BROKEN_IMAGES]).to be_nil
expect(post.post_hotlinked_media).to eq([])
end
end
end