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102 lines
2.8 KiB
Elixir
102 lines
2.8 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.RichMedia.Backfill do
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alias Pleroma.Web.RichMedia.Card
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alias Pleroma.Web.RichMedia.Parser
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alias Pleroma.Web.RichMedia.Parser.TTL
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alias Pleroma.Workers.RichMediaExpirationWorker
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require Logger
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@backfiller Pleroma.Config.get([__MODULE__, :provider], Pleroma.Web.RichMedia.Backfill.Task)
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@cachex Pleroma.Config.get([:cachex, :provider], Cachex)
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@max_attempts 3
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@retry 5_000
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def start(%{url: url} = args) when is_binary(url) do
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url_hash = Card.url_to_hash(url)
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args =
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args
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|> Map.put(:attempt, 1)
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|> Map.put(:url_hash, url_hash)
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@backfiller.run(args)
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end
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def run(%{url: url, url_hash: url_hash, attempt: attempt} = args)
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when attempt <= @max_attempts do
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case Parser.parse(url) do
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{:ok, fields} ->
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{:ok, card} = Card.create(url, fields)
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maybe_schedule_expiration(url, fields)
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if Map.has_key?(args, :activity_id) do
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stream_update(args)
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end
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warm_cache(url_hash, card)
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{:error, {:invalid_metadata, fields}} ->
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Logger.debug("Rich media incomplete or invalid metadata for #{url}: #{inspect(fields)}")
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negative_cache(url_hash)
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{:error, :body_too_large} ->
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Logger.error("Rich media error for #{url}: :body_too_large")
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negative_cache(url_hash)
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{:error, {:content_type, type}} ->
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Logger.debug("Rich media error for #{url}: :content_type is #{type}")
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negative_cache(url_hash)
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e ->
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Logger.debug("Rich media error for #{url}: #{inspect(e)}")
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:timer.sleep(@retry * attempt)
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run(%{args | attempt: attempt + 1})
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end
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end
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def run(%{url: url, url_hash: url_hash}) do
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Logger.debug("Rich media failure for #{url}")
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negative_cache(url_hash, :timer.minutes(15))
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end
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defp maybe_schedule_expiration(url, fields) do
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case TTL.process(fields, url) do
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{:ok, ttl} when is_number(ttl) ->
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timestamp = DateTime.from_unix!(ttl)
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RichMediaExpirationWorker.new(%{"url" => url}, scheduled_at: timestamp)
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|> Oban.insert()
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_ ->
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:ok
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end
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end
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defp stream_update(%{activity_id: activity_id}) do
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Pleroma.Activity.get_by_id(activity_id)
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|> Pleroma.Activity.normalize()
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|> Pleroma.Web.ActivityPub.ActivityPub.stream_out()
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end
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defp warm_cache(key, val), do: @cachex.put(:rich_media_cache, key, val)
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defp negative_cache(key, ttl \\ nil), do: @cachex.put(:rich_media_cache, key, nil, ttl: ttl)
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end
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defmodule Pleroma.Web.RichMedia.Backfill.Task do
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alias Pleroma.Web.RichMedia.Backfill
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def run(args) do
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Task.Supervisor.start_child(Pleroma.TaskSupervisor, Backfill, :run, [args],
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name: {:global, {:rich_media, args.url_hash}}
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)
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end
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end
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