lib/pleroma/html.ex: Use a function as a variable (broken for some reason)

[akkoma] / lib / pleroma / html.ex

diff --git a/lib/pleroma/html.ex b/lib/pleroma/html.ex
index 107784e70496219156c616e17561e0285a94fd3d..8a5ede614247f90a8d56efb4552c0d6e1a0a11f4 100644 (file)
--- a/lib/pleroma/html.ex
+++ b/lib/pleroma/html.ex
@@ -3,11 +3,47 @@ defmodule Pleroma.HTML do
 
   @markup Application.get_env(:pleroma, :markup)
 
-  def filter_tags(html) do
-    scrubber = Keyword.get(@markup, :scrub_policy)
+  def valid_schemes() do
+    [
+      "https://",
+      "http://",
+      "dat://",
+      "dweb://",
+      "gopher://",
+      "ipfs://",
+      "ipns://",
+      "irc:",
+      "ircs:",
+      "magnet:",
+      "mailto:",
+      "mumble:",
+      "ssb://",
+      "xmpp:"
+    ]
+  end
+
+  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
+    Keyword.get(@markup, :scrub_policy)
+    |> get_scrubbers
+  end
+
+  def filter_tags(html, nil) do
+    get_scrubbers()
+    |> Enum.reduce(html, fn scrubber, html ->
+      filter_tags(html, scrubber)
+    end)
+  end
+
+  def filter_tags(html, scrubber) do
     html |> Scrubber.scrub(scrubber)
   end
 
+  def filter_tags(html), do: filter_tags(html, nil)
+
   def strip_tags(html) do
     html |> Scrubber.scrub(Scrubber.StripTags)
   end
@@ -22,13 +58,13 @@ defmodule Pleroma.HTML.Scrubber.TwitterText do
   require HtmlSanitizeEx.Scrubber.Meta
   alias HtmlSanitizeEx.Scrubber.Meta
 
-  @valid_schemes ["http", "https"]
+  alias Pleroma.HTML
 
   Meta.remove_cdata_sections_before_scrub()
   Meta.strip_comments()
 
   # links
-  Meta.allow_tag_with_uri_attributes("a", ["href"], @valid_schemes)
+  Meta.allow_tag_with_uri_attributes("a", ["href"], HTML.valid_schemes())
   Meta.allow_tag_with_these_attributes("a", ["name", "title"])
 
   # paragraphs and linebreaks
@@ -43,7 +79,7 @@ defmodule Pleroma.HTML.Scrubber.TwitterText do
   @allow_inline_images Keyword.get(@markup, :allow_inline_images)
 
   if @allow_inline_images do
-    Meta.allow_tag_with_uri_attributes("img", ["src"], @valid_schemes)
+    Meta.allow_tag_with_uri_attributes("img", ["src"], HTML.valid_schemes())
 
     Meta.allow_tag_with_these_attributes("img", [
       "width",
@@ -52,6 +88,8 @@ defmodule Pleroma.HTML.Scrubber.TwitterText do
       "alt"
     ])
   end
+
+  Meta.strip_everything_not_covered()
 end
 
 defmodule Pleroma.HTML.Scrubber.Default do
@@ -60,12 +98,12 @@ defmodule Pleroma.HTML.Scrubber.Default do
   require HtmlSanitizeEx.Scrubber.Meta
   alias HtmlSanitizeEx.Scrubber.Meta
 
-  @valid_schemes ["http", "https"]
+  alias Pleroma.HTML
 
   Meta.remove_cdata_sections_before_scrub()
   Meta.strip_comments()
 
-  Meta.allow_tag_with_uri_attributes("a", ["href"], @valid_schemes)
+  Meta.allow_tag_with_uri_attributes("a", ["href"], HTML.valid_schemes())
   Meta.allow_tag_with_these_attributes("a", ["name", "title"])
 
   Meta.allow_tag_with_these_attributes("b", [])
@@ -88,7 +126,7 @@ defmodule Pleroma.HTML.Scrubber.Default do
   @allow_inline_images Keyword.get(@markup, :allow_inline_images)
 
   if @allow_inline_images do
-    Meta.allow_tag_with_uri_attributes("img", ["src"], @valid_schemes)
+    Meta.allow_tag_with_uri_attributes("img", ["src"], HTML.valid_schemes())
 
     Meta.allow_tag_with_these_attributes("img", [
       "width",
@@ -127,3 +165,34 @@ defmodule Pleroma.HTML.Scrubber.Default do
 
   Meta.strip_everything_not_covered()
 end
+
+defmodule Pleroma.HTML.Transform.MediaProxy do
+  @moduledoc "Transforms inline image URIs to use MediaProxy."
+
+  alias Pleroma.Web.MediaProxy
+
+  def before_scrub(html), do: html
+
+  def scrub_attribute("img", {"src", "http" <> target}) do
+    media_url =
+      ("http" <> target)
+      |> MediaProxy.url()
+
+    {"src", media_url}
+  end
+
+  def scrub_attribute(tag, attribute), do: attribute
+
+  def scrub({"img", attributes, children}) do
+    attributes =
+      attributes
+      |> Enum.map(fn attr -> scrub_attribute("img", attr) end)
+      |> Enum.reject(&is_nil(&1))
+
+    {"img", attributes, children}
+  end
+
+  def scrub({tag, attributes, children}), do: {tag, attributes, children}
+  def scrub({tag, children}), do: children
+  def scrub(text), do: text
+end