From 85fa2fbce4ee315a15b517fae4bc9b5474d1db5a Mon Sep 17 00:00:00 2001
From: Sachin Joshi <satchin.joshi@gmail.com>
Date: Wed, 1 May 2019 01:37:17 +0545
Subject: [PATCH] add scrubber for html special char

---
 lib/pleroma/html.ex                           | 27 +++++++++++++++----
 .../web/twitter_api/views/activity_view.ex    |  2 +-
 2 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/lib/pleroma/html.ex b/lib/pleroma/html.ex
index cf6c0ee0a..eb33d12d9 100644
--- a/lib/pleroma/html.ex
+++ b/lib/pleroma/html.ex
@@ -28,12 +28,18 @@ 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_activity(content, scrubbers, activity, key \\ "") do
+  def get_cached_scrubbed_html_for_activity(
+        content,
+        scrubbers,
+        activity,
+        key \\ "",
+        callback \\ fn x -> x end
+      ) do
     key = "#{key}#{generate_scrubber_signature(scrubbers)}|#{activity.id}"
 
     Cachex.fetch!(:scrubber_cache, key, fn _key ->
       object = Pleroma.Object.normalize(activity)
-      ensure_scrubbed_html(content, scrubbers, object.data["fake"] || false)
+      ensure_scrubbed_html(content, scrubbers, object.data["fake"] || false, callback)
     end)
   end
 
@@ -42,16 +48,27 @@ def get_cached_stripped_html_for_activity(content, activity, key) do
       content,
       HtmlSanitizeEx.Scrubber.StripTags,
       activity,
-      key
+      key,
+      &HtmlEntities.decode/1
     )
   end
 
   def ensure_scrubbed_html(
         content,
         scrubbers,
-        false = _fake
+        fake,
+        callback
       ) do
-    {:commit, filter_tags(content, scrubbers)}
+    content =
+      content
+      |> filter_tags(scrubbers)
+      |> callback.()
+
+    if fake do
+      {:ignore, content}
+    else
+      {:commit, content}
+    end
   end
 
   def ensure_scrubbed_html(
diff --git a/lib/pleroma/web/twitter_api/views/activity_view.ex b/lib/pleroma/web/twitter_api/views/activity_view.ex
index 1007a2a48..c64152da8 100644
--- a/lib/pleroma/web/twitter_api/views/activity_view.ex
+++ b/lib/pleroma/web/twitter_api/views/activity_view.ex
@@ -289,7 +289,7 @@ def render(
       "uri" => object.data["id"],
       "user" => UserView.render("show.json", %{user: user, for: opts[:for]}),
       "statusnet_html" => html,
-      "text" => HtmlEntities.decode(text),
+      "text" => text,
       "is_local" => activity.local,
       "is_post_verb" => true,
       "created_at" => created_at,