From 46236d1d873473d95b11cd7bfdcaa284ea55a9ad Mon Sep 17 00:00:00 2001
From: rinpatch <rinpatch@sdf.org>
Date: Wed, 2 Sep 2020 12:42:25 +0300
Subject: [PATCH] html.ex: optimize external url extraction

By using a :not() selector and only extracting attributes from the
first match.
---
 lib/pleroma/html.ex | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/pleroma/html.ex b/lib/pleroma/html.ex
index dc1b9b840..20b02f091 100644
--- a/lib/pleroma/html.ex
+++ b/lib/pleroma/html.ex
@@ -109,8 +109,9 @@ def extract_first_external_url(object, content) do
       result =
         content
         |> Floki.parse_fragment!()
-        |> Floki.filter_out("a.mention,a.hashtag,a.attachment,a[rel~=\"tag\"]")
-        |> Floki.attribute("a", "href")
+        |> Floki.find("a:not(.mention,.hashtag,.attachment,[rel~=\"tag\"])")
+        |> Enum.take(1)
+        |> Floki.attribute("href")
         |> Enum.at(0)
 
       {:commit, {:ok, result}}