From 03d06062ab8feffbf7b03ecb7ff86c4a42af79ef Mon Sep 17 00:00:00 2001 From: Alexander Strizhakov Date: Tue, 1 Sep 2020 19:12:45 +0300 Subject: [PATCH] don't fail on url fetch --- lib/pleroma/web/rich_media/parser.ex | 44 ++++++++++++---------- .../web/rich_media/parsers/ttl/aws_signed_url.ex | 15 +++----- test/web/rich_media/aws_signed_url_test.exs | 2 +- test/web/rich_media/parser_test.exs | 26 +++++++++---- 4 files changed, 49 insertions(+), 38 deletions(-) diff --git a/lib/pleroma/web/rich_media/parser.ex b/lib/pleroma/web/rich_media/parser.ex index ca592833f..e9aa2dd03 100644 --- a/lib/pleroma/web/rich_media/parser.ex +++ b/lib/pleroma/web/rich_media/parser.ex @@ -3,6 +3,8 @@ # SPDX-License-Identifier: AGPL-3.0-only defmodule Pleroma.Web.RichMedia.Parser do + require Logger + defp parsers do Pleroma.Config.get([:rich_media, :parsers]) end @@ -10,18 +12,19 @@ defmodule Pleroma.Web.RichMedia.Parser do def parse(nil), do: {:error, "No URL provided"} if Pleroma.Config.get(:env) == :test do + @spec parse(String.t()) :: {:ok, map()} | {:error, any()} def parse(url), do: parse_url(url) else + @spec parse(String.t()) :: {:ok, map()} | {:error, any()} def parse(url) do - try do - Cachex.fetch!(:rich_media_cache, url, fn _ -> - {:commit, parse_url(url)} - end) - |> set_ttl_based_on_image(url) - rescue - e -> - {:error, "Cachex error: #{inspect(e)}"} - end + Cachex.fetch!(:rich_media_cache, url, fn _ -> + with {:ok, data} <- parse_url(url) do + {:commit, {:ok, data}} + else + error -> {:ignore, error} + end + end) + |> set_ttl_based_on_image(url) end end @@ -47,9 +50,11 @@ defmodule Pleroma.Web.RichMedia.Parser do config :pleroma, :rich_media, ttl_setters: [MyModule] """ + @spec set_ttl_based_on_image({:ok, map()} | {:error, any()}, String.t()) :: + {:ok, map()} | {:error, any()} def set_ttl_based_on_image({:ok, data}, url) do with {:ok, nil} <- Cachex.ttl(:rich_media_cache, url), - ttl when is_number(ttl) <- get_ttl_from_image(data, url) do + {:ok, ttl} when is_number(ttl) <- get_ttl_from_image(data, url) do Cachex.expire_at(:rich_media_cache, url, ttl * 1000) {:ok, data} else @@ -58,8 +63,14 @@ defmodule Pleroma.Web.RichMedia.Parser do end end + def set_ttl_based_on_image({:error, _} = error, _) do + Logger.error("parsing error: #{inspect(error)}") + error + end + defp get_ttl_from_image(data, url) do - Pleroma.Config.get([:rich_media, :ttl_setters]) + [:rich_media, :ttl_setters] + |> Pleroma.Config.get() |> Enum.reduce({:ok, nil}, fn module, {:ok, _ttl} -> module.ttl(data, url) @@ -70,23 +81,16 @@ defmodule Pleroma.Web.RichMedia.Parser do end defp parse_url(url) do - try do - {:ok, %Tesla.Env{body: html}} = Pleroma.Web.RichMedia.Helpers.rich_media_get(url) - + with {:ok, %Tesla.Env{body: html}} <- Pleroma.Web.RichMedia.Helpers.rich_media_get(url), + {:ok, html} <- Floki.parse_document(html) do html - |> parse_html() |> maybe_parse() |> Map.put("url", url) |> clean_parsed_data() |> check_parsed_data() - rescue - e -> - {:error, "Parsing error: #{inspect(e)} #{inspect(__STACKTRACE__)}"} end end - defp parse_html(html), do: Floki.parse_document!(html) - defp maybe_parse(html) do Enum.reduce_while(parsers(), %{}, fn parser, acc -> case parser.parse(html, acc) do diff --git a/lib/pleroma/web/rich_media/parsers/ttl/aws_signed_url.ex b/lib/pleroma/web/rich_media/parsers/ttl/aws_signed_url.ex index 0dc1efdaf..c5aaea2d4 100644 --- a/lib/pleroma/web/rich_media/parsers/ttl/aws_signed_url.ex +++ b/lib/pleroma/web/rich_media/parsers/ttl/aws_signed_url.ex @@ -10,20 +10,15 @@ defmodule Pleroma.Web.RichMedia.Parser.TTL.AwsSignedUrl do |> parse_query_params() |> format_query_params() |> get_expiration_timestamp() + else + {:error, "Not aws signed url #{inspect(image)}"} end end - defp is_aws_signed_url(""), do: nil - defp is_aws_signed_url(nil), do: nil - - defp is_aws_signed_url(image) when is_binary(image) do + defp is_aws_signed_url(image) when is_binary(image) and image != "" do %URI{host: host, query: query} = URI.parse(image) - if String.contains?(host, "amazonaws.com") and String.contains?(query, "X-Amz-Expires") do - image - else - nil - end + String.contains?(host, "amazonaws.com") and String.contains?(query, "X-Amz-Expires") end defp is_aws_signed_url(_), do: nil @@ -46,6 +41,6 @@ defmodule Pleroma.Web.RichMedia.Parser.TTL.AwsSignedUrl do |> Map.get("X-Amz-Date") |> Timex.parse("{ISO:Basic:Z}") - Timex.to_unix(date) + String.to_integer(Map.get(params, "X-Amz-Expires")) + {:ok, Timex.to_unix(date) + String.to_integer(Map.get(params, "X-Amz-Expires"))} end end diff --git a/test/web/rich_media/aws_signed_url_test.exs b/test/web/rich_media/aws_signed_url_test.exs index b30f4400e..a21f3c935 100644 --- a/test/web/rich_media/aws_signed_url_test.exs +++ b/test/web/rich_media/aws_signed_url_test.exs @@ -21,7 +21,7 @@ defmodule Pleroma.Web.RichMedia.TTL.AwsSignedUrlTest do expire_time = Timex.parse!(timestamp, "{ISO:Basic:Z}") |> Timex.to_unix() |> Kernel.+(valid_till) - assert expire_time == Pleroma.Web.RichMedia.Parser.TTL.AwsSignedUrl.ttl(metadata, url) + assert {:ok, expire_time} == Pleroma.Web.RichMedia.Parser.TTL.AwsSignedUrl.ttl(metadata, url) end test "s3 signed url is parsed and correct ttl is set for rich media" do diff --git a/test/web/rich_media/parser_test.exs b/test/web/rich_media/parser_test.exs index 420a612c6..1e09cbf84 100644 --- a/test/web/rich_media/parser_test.exs +++ b/test/web/rich_media/parser_test.exs @@ -5,6 +5,8 @@ defmodule Pleroma.Web.RichMedia.ParserTest do use ExUnit.Case, async: true + alias Pleroma.Web.RichMedia.Parser + setup do Tesla.Mock.mock(fn %{ @@ -48,23 +50,29 @@ defmodule Pleroma.Web.RichMedia.ParserTest do %{method: :get, url: "http://example.com/empty"} -> %Tesla.Env{status: 200, body: "hello"} + + %{method: :get, url: "http://example.com/malformed"} -> + %Tesla.Env{status: 200, body: File.read!("test/fixtures/rich_media/malformed-data.html")} + + %{method: :get, url: "http://example.com/error"} -> + {:error, :overload} end) :ok end test "returns error when no metadata present" do - assert {:error, _} = Pleroma.Web.RichMedia.Parser.parse("http://example.com/empty") + assert {:error, _} = Parser.parse("http://example.com/empty") end test "doesn't just add a title" do - assert Pleroma.Web.RichMedia.Parser.parse("http://example.com/non-ogp") == + assert Parser.parse("http://example.com/non-ogp") == {:error, "Found metadata was invalid or incomplete: %{\"url\" => \"http://example.com/non-ogp\"}"} end test "parses ogp" do - assert Pleroma.Web.RichMedia.Parser.parse("http://example.com/ogp") == + assert Parser.parse("http://example.com/ogp") == {:ok, %{ "image" => "http://ia.media-imdb.com/images/rock.jpg", @@ -77,7 +85,7 @@ defmodule Pleroma.Web.RichMedia.ParserTest do end test "falls back to when ogp:title is missing" do - assert Pleroma.Web.RichMedia.Parser.parse("http://example.com/ogp-missing-title") == + assert Parser.parse("http://example.com/ogp-missing-title") == {:ok, %{ "image" => "http://ia.media-imdb.com/images/rock.jpg", @@ -90,7 +98,7 @@ defmodule Pleroma.Web.RichMedia.ParserTest do end test "parses twitter card" do - assert Pleroma.Web.RichMedia.Parser.parse("http://example.com/twitter-card") == + assert Parser.parse("http://example.com/twitter-card") == {:ok, %{ "card" => "summary", @@ -103,7 +111,7 @@ defmodule Pleroma.Web.RichMedia.ParserTest do end test "parses OEmbed" do - assert Pleroma.Web.RichMedia.Parser.parse("http://example.com/oembed") == + assert Parser.parse("http://example.com/oembed") == {:ok, %{ "author_name" => "‮‭‬bees‬", @@ -132,6 +140,10 @@ defmodule Pleroma.Web.RichMedia.ParserTest do end test "rejects invalid OGP data" do - assert {:error, _} = Pleroma.Web.RichMedia.Parser.parse("http://example.com/malformed") + assert {:error, _} = Parser.parse("http://example.com/malformed") + end + + test "returns error if getting page was not successful" do + assert {:error, :overload} = Parser.parse("http://example.com/error") end end