Fix radio streaming from URL containing no path and no trailing '/'

The radio streaming and metadata fetching didn't work for such stream URL
where there was only the domain and possibly a port number but no any kind of
path after that. If there was even the "empty path" denoted with a trailing
slash ('/'), then things worked fine.

As a working example, https://runder.org:8000 is a stream URL where this bug
used to show.

CHANGELOG.md

@@ -10,6 +10,7 @@
   * Clicking the previously played song didn't play it again after stopping the playback with the keyboard 'stop' media key
 - Radio stream relaying not working on some redirecting stream URLs, depending on the headers
   [#1194](https://github.com/owncloud/music/issues/1194)
+- Radio stream playback failing when the stream URL has only the domain part without any path and no trailing '/' (like http://abc.somedomain.xyz)
 
 ## 2.1.1 - 2025-01-03
 

lib/Utility/RadioService.php

@@ -59,7 +59,7 @@ private static function parseStreamUrl(string $url) : array {
 
 		$ret['scheme'] = $parse_url['scheme'];
 		$ret['hostname'] = $parse_url['host'];
-		$ret['pathname'] = $parse_url['path'];
+		$ret['pathname'] = $parse_url['path'] ?? '/';
 
 		if (isset($parse_url['query'])) {
 			$ret['pathname'] .= "?" . $parse_url['query'];
@@ -276,7 +276,7 @@ public function resolveStreamUrl(string $url) : array {
 		$isHls = false;
 
 		$urlParts = \parse_url($url);
-		$lcPath = \mb_strtolower($urlParts['path']);
+		$lcPath = \mb_strtolower($urlParts['path'] ?? '/');
 
 		$isPls = Util::endsWith($lcPath, '.pls');
 		$isM3u = !$isPls && (Util::endsWith($lcPath, '.m3u') || Util::endsWith($lcPath, '.m3u8'));