Make Floki use fast_html

config/config.exs

@@ -612,6 +612,8 @@ config :pleroma, :modules, runtime_dir: "instance/modules"
 
 config :pleroma, configurable_from_database: false
 
+config :floki, :html_parser, Floki.HTMLParser.FastHtml
+
 # Import environment specific config. This must remain at the bottom
 # of this file so it overrides the configuration defined above.
 import_config "#{Mix.env()}.exs"

lib/pleroma/html.ex

@@ -108,6 +108,7 @@ defmodule Pleroma.HTML do
     Cachex.fetch!(:scrubber_cache, key, fn _key ->
       result =
         content
+        |> Floki.parse_fragment!()
         |> Floki.filter_out("a.mention,a.hashtag,a[rel~=\"tag\"]")
         |> Floki.attribute("a", "href")
         |> Enum.at(0)

lib/pleroma/web/activity_pub/mrf/anti_link_spam_policy.ex

@@ -17,6 +17,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.AntiLinkSpamPolicy do
   # does the post contain links?
   defp contains_links?(%{"content" => content} = _object) do
     content
+    |> Floki.parse_fragment!()
     |> Floki.filter_out("a.mention,a.hashtag,a[rel~=\"tag\"],a.zrl")
     |> Floki.attribute("a", "href")
     |> length() > 0

lib/pleroma/web/metadata/rel_me.ex

@@ -8,8 +8,10 @@ defmodule Pleroma.Web.Metadata.Providers.RelMe do
 
   @impl Provider
   def build_tags(%{user: user}) do
-    (Floki.attribute(user.bio, "link[rel~=me]", "href") ++
-       Floki.attribute(user.bio, "a[rel~=me]", "href"))
+    bio_tree = Floki.parse_fragment!(user.bio)
+
+    (Floki.attribute(bio_tree, "link[rel~=me]", "href") ++
+       Floki.attribute(bio_tree, "a[rel~=me]", "href"))
     |> Enum.map(fn link ->
       {:link, [rel: "me", href: link], []}
     end)

lib/pleroma/web/rel_me.ex

@@ -27,9 +27,10 @@ defmodule Pleroma.Web.RelMe do
   defp parse_url(url) do
     with {:ok, %Tesla.Env{body: html, status: status}} when status in 200..299 <-
            Pleroma.HTTP.get(url, [], adapter: @hackney_options),
+         {:ok, html_tree} <- Floki.parse_document(html),
          data <-
-           Floki.attribute(html, "link[rel~=me]", "href") ++
-             Floki.attribute(html, "a[rel~=me]", "href") do
+           Floki.attribute(html_tree, "link[rel~=me]", "href") ++
+             Floki.attribute(html_tree, "a[rel~=me]", "href") do
       {:ok, data}
     end
   rescue

lib/pleroma/web/rich_media/parser.ex

@@ -81,18 +81,18 @@ defmodule Pleroma.Web.RichMedia.Parser do
       {:ok, %Tesla.Env{body: html}} = Pleroma.HTTP.get(url, [], adapter: @hackney_options)
 
       html
-      |> parse_html
+      |> parse_html()
       |> maybe_parse()
       |> Map.put(:url, url)
       |> clean_parsed_data()
       |> check_parsed_data()
     rescue
       e ->
-        {:error, "Parsing error: #{inspect(e)}"}
+        {:error, "Parsing error: #{inspect(e)} #{inspect(__STACKTRACE__)}"}
     end
   end
 
-  defp parse_html(html), do: Floki.parse(html)
+  defp parse_html(html), do: Floki.parse_document!(html)
 
   defp maybe_parse(html) do
     Enum.reduce_while(parsers(), %{}, fn parser, acc ->

test/web/rich_media/parsers/twitter_card_test.exs

@@ -7,11 +7,14 @@ defmodule Pleroma.Web.RichMedia.Parsers.TwitterCardTest do
   alias Pleroma.Web.RichMedia.Parsers.TwitterCard
 
   test "returns error when html not contains twitter card" do
-    assert TwitterCard.parse("", %{}) == {:error, "No twitter card metadata found"}
+    assert TwitterCard.parse([{"html", [], [{"head", [], []}, {"body", [], []}]}], %{}) ==
+             {:error, "No twitter card metadata found"}
   end
 
   test "parses twitter card with only name attributes" do
-    html = File.read!("test/fixtures/nypd-facial-recognition-children-teenagers3.html")
+    html =
+      File.read!("test/fixtures/nypd-facial-recognition-children-teenagers3.html")
+      |> Floki.parse_document!()
 
     assert TwitterCard.parse(html, %{}) ==
              {:ok,
@@ -26,7 +29,9 @@ defmodule Pleroma.Web.RichMedia.Parsers.TwitterCardTest do
   end
 
   test "parses twitter card with only property attributes" do
-    html = File.read!("test/fixtures/nypd-facial-recognition-children-teenagers2.html")
+    html =
+      File.read!("test/fixtures/nypd-facial-recognition-children-teenagers2.html")
+      |> Floki.parse_document!()
 
     assert TwitterCard.parse(html, %{}) ==
              {:ok,
@@ -45,7 +50,9 @@ defmodule Pleroma.Web.RichMedia.Parsers.TwitterCardTest do
   end
 
   test "parses twitter card with name & property attributes" do
-    html = File.read!("test/fixtures/nypd-facial-recognition-children-teenagers.html")
+    html =
+      File.read!("test/fixtures/nypd-facial-recognition-children-teenagers.html")
+      |> Floki.parse_document!()
 
     assert TwitterCard.parse(html, %{}) ==
              {:ok,
@@ -73,7 +80,8 @@ defmodule Pleroma.Web.RichMedia.Parsers.TwitterCardTest do
         "YTQ5MF9EQVIgZXhodW1hdGlvbiBvZiBNYXJnYXJldCBDb3JiaW4gZ3JhdmUgMTkyNi5qcGciXSxbInAiLCJjb252ZXJ0IiwiIl0sWyJwIiwiY29udmVydCIsIi1xdWFsaXR5IDgxIC1hdXRvLW9" <>
         "yaWVudCJdLFsicCIsInRodW1iIiwiNjAweD4iXV0/DAR%20exhumation%20of%20Margaret%20Corbin%20grave%201926.jpg"
 
-    html = File.read!("test/fixtures/margaret-corbin-grave-west-point.html")
+    html =
+      File.read!("test/fixtures/margaret-corbin-grave-west-point.html") |> Floki.parse_document!()
 
     assert TwitterCard.parse(html, %{}) ==
              {:ok,
@@ -87,7 +95,9 @@ defmodule Pleroma.Web.RichMedia.Parsers.TwitterCardTest do
   end
 
   test "takes first founded title in html head if there is html markup error" do
-    html = File.read!("test/fixtures/nypd-facial-recognition-children-teenagers4.html")
+    html =
+      File.read!("test/fixtures/nypd-facial-recognition-children-teenagers4.html")
+      |> Floki.parse_document!()
 
     assert TwitterCard.parse(html, %{}) ==
              {:ok,