discourse/lib/backup_restore/uploads_restorer.rb

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# frozen_string_literal: true
module BackupRestore
UploadsRestoreError = Class.new(RuntimeError)
class UploadsRestorer
delegate :log, to: :@logger, private: true
def initialize(logger)
@logger = logger
end
def restore(tmp_directory)
upload_directories = Dir.glob(File.join(tmp_directory, "uploads", "*"))
.reject { |path| File.basename(path).start_with?("PaxHeaders") }
if upload_directories.count > 1
raise UploadsRestoreError.new("Could not find uploads, because the uploads " \
"directory contains multiple folders.")
end
@tmp_uploads_path = upload_directories.first
return if @tmp_uploads_path.blank?
@previous_db_name = BackupMetadata.value_for("db_name") || File.basename(@tmp_uploads_path)
@current_db_name = RailsMultisite::ConnectionManagement.current_db
backup_contains_optimized_images = File.exist?(File.join(@tmp_uploads_path, "optimized"))
remap_uploads
restore_uploads
generate_optimized_images unless backup_contains_optimized_images
rebake_posts_with_uploads
end
protected
def restore_uploads
store = Discourse.store
if !store.respond_to?(:copy_from)
# a FileStore implementation from a plugin might not support this method, so raise a helpful error
store_name = Discourse.store.class.name
raise UploadsRestoreError.new("The current file store (#{store_name}) does not support restoring uploads.")
end
log "Restoring uploads, this may take a while..."
store.copy_from(@tmp_uploads_path)
end
# Remaps upload URLs depending on old and new configuration.
# URLs of uploads differ a little bit between local uploads and uploads stored on S3.
# Multisites are another reason why URLs can be different.
#
# Examples:
# * regular site, local storage
# /uploads/default/original/1X/63b76551662ccea1a594e161c37dd35188d77657.jpeg
#
# * regular site, S3
# //bucket-name.s3.dualstack.us-west-2.amazonaws.com/original/1X/63b76551662ccea1a594e161c37dd35188d77657.jpeg
#
# * multisite, local storage
# /uploads/<site-name>/original/1X/63b76551662ccea1a594e161c37dd35188d77657.jpeg
#
# * multisite, S3
# //bucket-name.s3.dualstack.us-west-2.amazonaws.com/uploads/<site-name>/original/1X/63b76551662ccea1a594e161c37dd35188d77657.jpeg
def remap_uploads
log "Remapping uploads..."
was_multisite = BackupMetadata.value_for("multisite") == "t"
upload_path = "/#{Discourse.store.upload_path}/"
uploads_folder = was_multisite ? "/" : upload_path
if (old_base_url = BackupMetadata.value_for("base_url")) && old_base_url != Discourse.base_url
remap(old_base_url, Discourse.base_url)
end
current_s3_base_url = SiteSetting::Upload.enable_s3_uploads ? SiteSetting::Upload.s3_base_url : nil
if (old_s3_base_url = BackupMetadata.value_for("s3_base_url")) && old_s3_base_url != current_s3_base_url
remap("#{old_s3_base_url}/", uploads_folder)
end
current_s3_cdn_url = SiteSetting::Upload.enable_s3_uploads ? SiteSetting::Upload.s3_cdn_url : nil
if (old_s3_cdn_url = BackupMetadata.value_for("s3_cdn_url")) && old_s3_cdn_url != current_s3_cdn_url
base_url = current_s3_cdn_url || Discourse.base_url
remap("#{old_s3_cdn_url}/", UrlHelper.schemaless("#{base_url}#{uploads_folder}"))
old_host = URI.parse(old_s3_cdn_url).host
new_host = URI.parse(base_url).host
remap(old_host, new_host) if old_host != new_host
end
if (old_cdn_url = BackupMetadata.value_for("cdn_url")) && old_cdn_url != Discourse.asset_host
base_url = Discourse.asset_host || Discourse.base_url
remap("#{old_cdn_url}/", UrlHelper.schemaless("#{base_url}/"))
old_host = URI.parse(old_cdn_url).host
new_host = URI.parse(base_url).host
remap(old_host, new_host) if old_host != new_host
end
if @previous_db_name != @current_db_name
remap("/uploads/#{@previous_db_name}/", upload_path)
end
rescue => ex
log "Something went wrong while remapping uploads.", ex
end
def remap(from, to)
log "Remapping '#{from}' to '#{to}'"
DbHelper.remap(from, to, verbose: true, excluded_tables: ["backup_metadata"])
end
def generate_optimized_images
log "Optimizing site icons..."
DB.exec("TRUNCATE TABLE optimized_images")
SiteIconManager.ensure_optimized!
User.where("uploaded_avatar_id IS NOT NULL").find_each do |user|
Jobs.enqueue(:create_avatar_thumbnails, upload_id: user.uploaded_avatar_id)
end
end
def rebake_posts_with_uploads
log 'Posts will be rebaked by a background job in sidekiq. You will see missing images until that has completed.'
log 'You can expedite the process by manually running "rake posts:rebake_uncooked_posts"'
DB.exec(<<~SQL)
UPDATE posts
SET baked_version = NULL
WHERE id IN (SELECT post_id FROM post_uploads)
SQL
end
end
end