From a98cda77580ead154dd2cb020c6d4ebc1e719d86 Mon Sep 17 00:00:00 2001
From: Egor Kislitsyn <egor@kislitsyn.com>
Date: Fri, 29 Nov 2019 15:49:35 +0700
Subject: [PATCH] Fix Pleroma.HTML.extract_first_external_url/2

---
 lib/pleroma/html.ex |  1 +
 test/html_test.exs  | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/lib/pleroma/html.ex b/lib/pleroma/html.ex
index 997e965f0..4acd46253 100644
--- a/lib/pleroma/html.ex
+++ b/lib/pleroma/html.ex
@@ -91,6 +91,7 @@ defmodule Pleroma.HTML do
     Cachex.fetch!(:scrubber_cache, key, fn _key ->
       result =
         content
+        |> HtmlEntities.decode()
         |> Floki.filter_out("a.mention,a.hashtag,a[rel~=\"tag\"]")
         |> Floki.attribute("a", "href")
         |> Enum.at(0)
diff --git a/test/html_test.exs b/test/html_test.exs
index f0869534c..c918dbe20 100644
--- a/test/html_test.exs
+++ b/test/html_test.exs
@@ -228,5 +228,16 @@ defmodule Pleroma.HTMLTest do
 
       assert url == "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=72255140"
     end
+
+    test "does not crash when there is an HTML entity in a link" do
+      user = insert(:user)
+
+      {:ok, activity} =
+        CommonAPI.post(user, %{"status" => "\"http://cofe.com/?boomer=ok&foo=bar\""})
+
+      object = Object.normalize(activity)
+
+      assert {:ok, nil} = HTML.extract_first_external_url(object, object.data["content"])
+    end
   end
 end