X-Git-Url: http://git.squeep.com/?a=blobdiff_plain;ds=sidebyside;f=lib%2Fpleroma%2Fweb%2Frich_media%2Fparser.ex;h=1d4cad0100e2ebcb8092b96555f5b5dfa938fa70;hb=63ce25f32c9bd0dfd5a4db9ad14b6b773c9b05a9;hp=33f6f1fa1bba2aab9ce02476af39499747066c92;hpb=5c4ff5c73ce41f252e99a3c5c445efcecaa43dfe;p=akkoma
diff --git a/lib/pleroma/web/rich_media/parser.ex b/lib/pleroma/web/rich_media/parser.ex
index 33f6f1fa1..1d4cad010 100644
--- a/lib/pleroma/web/rich_media/parser.ex
+++ b/lib/pleroma/web/rich_media/parser.ex
@@ -1,10 +1,12 @@
# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors
+# Copyright © 2017-2021 Pleroma Authors
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.RichMedia.Parser do
require Logger
+ @cachex Pleroma.Config.get([:cachex, :provider], Cachex)
+
defp parsers do
Pleroma.Config.get([:rich_media, :parsers])
end
@@ -13,43 +15,68 @@ defmodule Pleroma.Web.RichMedia.Parser do
if Pleroma.Config.get(:env) == :test do
@spec parse(String.t()) :: {:ok, map()} | {:error, any()}
- def parse(url), do: parse_url(url)
+ def parse(url), do: parse_with_timeout(url)
else
@spec parse(String.t()) :: {:ok, map()} | {:error, any()}
def parse(url) do
with {:ok, data} <- get_cached_or_parse(url),
{:ok, _} <- set_ttl_based_on_image(data, url) do
{:ok, data}
- else
- {:error, {:invalid_metadata, data}} = e ->
- Logger.debug(fn -> "Incomplete or invalid metadata for #{url}: #{inspect(data)}" end)
- e
-
- error ->
- Logger.error(fn -> "Rich media error for #{url}: #{inspect(error)}" end)
- error
end
end
defp get_cached_or_parse(url) do
- case Cachex.fetch!(:rich_media_cache, url, fn _ -> {:commit, parse_url(url)} end) do
- {:ok, _data} = res ->
- res
-
- {:error, :body_too_large} = e ->
- e
-
- {:error, {:content_type, _}} = e ->
- e
-
- # The TTL is not set for the errors above, since they are unlikely to change
- # with time
- {:error, _} = e ->
- ttl = Pleroma.Config.get([:rich_media, :failure_backoff], 60_000)
- Cachex.expire(:rich_media_cache, url, ttl)
- e
+ case @cachex.fetch(:rich_media_cache, url, fn ->
+ case parse_with_timeout(url) do
+ {:ok, _} = res ->
+ {:commit, res}
+
+ {:error, reason} = e ->
+ # Unfortunately we have to log errors here, instead of doing that
+ # along with ttl setting at the bottom. Otherwise we can get log spam
+ # if more than one process was waiting for the rich media card
+ # while it was generated. Ideally we would set ttl here as well,
+ # so we don't override it number_of_waiters_on_generation
+ # times, but one, obviously, can't set ttl for not-yet-created entry
+ # and Cachex doesn't support returning ttl from the fetch callback.
+ log_error(url, reason)
+ {:commit, e}
+ end
+ end) do
+ {action, res} when action in [:commit, :ok] ->
+ case res do
+ {:ok, _data} = res ->
+ res
+
+ {:error, reason} = e ->
+ if action == :commit, do: set_error_ttl(url, reason)
+ e
+ end
+
+ {:error, e} ->
+ {:error, {:cachex_error, e}}
end
end
+
+ defp set_error_ttl(_url, :body_too_large), do: :ok
+ defp set_error_ttl(_url, {:content_type, _}), do: :ok
+
+ # The TTL is not set for the errors above, since they are unlikely to change
+ # with time
+
+ defp set_error_ttl(url, _reason) do
+ ttl = Pleroma.Config.get([:rich_media, :failure_backoff], 60_000)
+ @cachex.expire(:rich_media_cache, url, ttl)
+ :ok
+ end
+
+ defp log_error(url, {:invalid_metadata, data}) do
+ Logger.debug(fn -> "Incomplete or invalid metadata for #{url}: #{inspect(data)}" end)
+ end
+
+ defp log_error(url, reason) do
+ Logger.warn(fn -> "Rich media error for #{url}: #{inspect(reason)}" end)
+ end
end
@doc """
@@ -81,7 +108,7 @@ defmodule Pleroma.Web.RichMedia.Parser do
{:ok, ttl} when is_number(ttl) ->
ttl = ttl * 1000
- case Cachex.expire_at(:rich_media_cache, url, ttl) do
+ case @cachex.expire_at(:rich_media_cache, url, ttl) do
{:ok, true} -> {:ok, ttl}
{:ok, false} -> {:error, :no_key}
end
@@ -114,6 +141,21 @@ defmodule Pleroma.Web.RichMedia.Parser do
end
end
+ def parse_with_timeout(url) do
+ try do
+ task =
+ Task.Supervisor.async_nolink(Pleroma.TaskSupervisor, fn ->
+ parse_url(url)
+ end)
+
+ Task.await(task, 5000)
+ catch
+ :exit, {:timeout, _} ->
+ Logger.warn("Timeout while fetching rich media for #{url}")
+ {:error, :timeout}
+ end
+ end
+
defp maybe_parse(html) do
Enum.reduce_while(parsers(), %{}, fn parser, acc ->
case parser.parse(html, acc) do