rich_media_worker.ex
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rich_media_worker.ex
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	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Workers.RichMediaWorker do
	alias Pleroma.Config
	alias Pleroma.Web.RichMedia.Backfill
	alias Pleroma.Web.RichMedia.Card

	use Oban.Worker, queue: :background, max_attempts: 3, unique: [period: :infinity]

	@impl true
	def perform(%Job{args: %{"op" => "expire", "url" => url} = _args}) do
	Card.delete(url)
	end

	def perform(%Job{args: %{"op" => "backfill", "url" => _url} = args}) do
	case Backfill.run(args) do
	:ok ->
	:ok

	{:error, type}
	when type in [:invalid_metadata, :body_too_large, :content_type, :validate, :get, :head] ->
	{:cancel, type}

	error ->
	{:error, error}
	end
	end

	# There is timeout value enforced by Tesla.Middleware.Timeout
	# which can be found in the RichMedia.Helpers module to allow us to detect
	# a slow/infinite data stream and insert a negative cache entry for the URL
	# We pad it by 2 seconds to be certain a slow connection is detected and we
	# can inject a negative cache entry for the URL
	@impl true
	def timeout(_job) do
	Config.get!([:rich_media, :timeout]) + :timer.seconds(2)
	end
	end