From f9a6d22c30938cb73ad2d79c22ce49f37b0fb966 Mon Sep 17 00:00:00 2001
From: Christian Schneider
Date: Wed, 4 Sep 2024 14:36:24 +0200
Subject: Allow data urls and do not encode as it can break them

---
 it_html.class | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/it_html.class b/it_html.class
index ec1e1ce..e9c1c67 100644
--- a/it_html.class
+++ b/it_html.class
@@ -506,7 +506,7 @@ static function U(...$args)
 	if (it::match('javascript', $u['scheme']))
 		$u['scheme'] = '';
 
-	$schemepart = $hostpart ? ($u['scheme'] ? $u['scheme'] . ":" : "") . "//$hostpart" : ($u['scheme'] == "mailto" ? $u['scheme'] . ":" : "");
+	$schemepart = $hostpart ? ($u['scheme'] ? $u['scheme'] . ":" : "") . "//$hostpart" : ($u['scheme'] == "data" || $u['scheme'] == "mailto" ? $u['scheme'] . ":" : "");
 
 	# remove strings that will be interpreted as scheme from path
 	if (!$schemepart && !$hostpart)
@@ -515,7 +515,7 @@ static function U(...$args)
 	# sanitize path and fragment
 	$u['path'] = preg_replace('|\\\\|', '/', $u['path']); # turn \ to /
 	foreach (['path', 'query', 'fragment'] as $key)
-		$u[$key] = preg_replace_callback('/[^-a-z0-9_.+!*(),:?@&=\/~$%#]|%(?![0-9a-f]{2})/i', function($m) { return rawurlencode($m[0]); }, $u[$key]);
+		$u[$key] = preg_replace_callback('/[^-a-z0-9_.+!*(),:?@&=\/~$%#]|%(?![0-9a-f]{2})/i', fn($m) => $u['scheme'] != 'data' ? rawurlencode($m[0]) : $m[0], $u[$key]);
 
 	# convert empty http url path to /
 	if (!$u['path'] && $hostpart && preg_match('/^(https?)?$/', $u['scheme']))
-- 
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