fix: do not get remote collabora url for own server

if you connect from your own server and it is also listed as a trusted
federation domain, there is no need to fetch the remote collabora url,
as it is the one already configured internally

Signed-off-by: Elizabeth Danzberger <lizzy7128@tutanota.de>

Author: elzody

lib/Service/FederationService.php

@@ -73,6 +73,14 @@ public function getRemoteCollaboraURL($remote) {
 		if (!$this->isTrustedRemote($remote)) {
 			throw new \Exception('Unable to determine collabora URL of remote server ' . $remote . ' - Remote is not a trusted server');
 		}
+
+		$serverProtocol = $this->request->getServerProtocol() . '://';
+		$serverHost = $this->request->getServerHost();
+		$server = $serverProtocol . $serverHost . $this->request->getRequestUri();
+		if (str_starts_with($server, $remote)) {
+			return $this->appConfig->getCollaboraUrlInternal();
+		}
+
 		$remoteCollabora = $this->cache->get('richdocuments_remote/' . $remote);
 		if ($remoteCollabora !== null) {
 			return $remoteCollabora;