# Pleroma: A lightweight social networking server
-# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.HTML do
alias HtmlSanitizeEx.Scrubber
+ defp get_scrubbers(scrubber) when is_atom(scrubber), do: [scrubber]
+ defp get_scrubbers(scrubbers) when is_list(scrubbers), do: scrubbers
+ defp get_scrubbers(_), do: [Pleroma.HTML.Scrubber.Default]
+
+ def get_scrubbers() do
+ Pleroma.Config.get([:markup, :scrub_policy])
+ |> get_scrubbers
+ end
+
+ def filter_tags(html, nil) do
+ filter_tags(html, get_scrubbers())
+ end
+
def filter_tags(html, scrubbers) when is_list(scrubbers) do
Enum.reduce(scrubbers, html, fn scrubber, html ->
filter_tags(html, scrubber)
def filter_tags(html, scrubber), do: Scrubber.scrub(html, scrubber)
def filter_tags(html), do: filter_tags(html, nil)
def strip_tags(html), do: Scrubber.scrub(html, Scrubber.StripTags)
+
+ def get_cached_scrubbed_html_for_object(content, scrubbers, object) do
+ key = "#{generate_scrubber_signature(scrubbers)}|#{object.id}"
+ Cachex.fetch!(:scrubber_cache, key, fn _key -> ensure_scrubbed_html(content, scrubbers) end)
+ end
+
+ def get_cached_stripped_html_for_object(content, object) do
+ get_cached_scrubbed_html_for_object(content, HtmlSanitizeEx.Scrubber.StripTags, object)
+ end
+
+ def ensure_scrubbed_html(
+ content,
+ scrubbers
+ ) do
+ {:commit, filter_tags(content, scrubbers)}
+ end
+
+ defp generate_scrubber_signature(scrubber) when is_atom(scrubber) do
+ generate_scrubber_signature([scrubber])
+ end
+
+ defp generate_scrubber_signature(scrubbers) do
+ Enum.reduce(scrubbers, "", fn scrubber, signature ->
+ # If a scrubber does not have a version(e.g HtmlSanitizeEx.Scrubber.StripTags) it is assumed it is always 0)
+ version =
+ if Kernel.function_exported?(scrubber, :version, 0) do
+ scrubber.version
+ else
+ 0
+ end
+
+ "#{signature}#{to_string(scrubber)}#{version}"
+ end)
+ end
end
defmodule Pleroma.HTML.Scrubber.TwitterText do
defmodule Pleroma.HTML.Transform.MediaProxy do
@moduledoc "Transforms inline image URIs to use MediaProxy."
+ alias Pleroma.Web.MediaProxy
+
def version do
0
end
- alias Pleroma.Web.MediaProxy
-
def before_scrub(html), do: html
def scrub_attribute("img", {"src", "http" <> target}) do