Wrong public WOPI url when collabora runs with non-empty net.service_root

Describe the bug

Our organisations only allows traffic through one webproxy domain to reach the containers such as nextcloud and collabora.

Hence, we have the two containers exposed like this:

• https://inbound-gate.com/department/nextcloud
• https://inbound-gate.com/department/collabora

On top, the k8s cluster sets up an internal network, so that the containers can talk directly to each other.

Collabora container has set:

extra_params: --o:ssl.enable=false --o:ssl.termination=true --o:ssl.ssl_verification=false --o:fetch_update_check=0 --o:user_interface.mode=tabbed --o:remote_font_config.url=[…]/fonts.json --o:net.proto=IPv4 --o:net.service_root=/department/collabora

server_name: inbound-gate.com:443

To Reproduce

php occ richdocuments:setup --wopi-url http://$COLLABORA_SERVICE_HOST:$COLLABORA_SERVICE_PORT/edps/collabora --callback-url http://$NEXTCLOUD_SERVICE_HOST:$NEXTCLOUD_SERVICE_PORT/edps/cloud

php occ config:list richdocuments

Notice that the public_wopi_url is https://inbound-gate.com instead of https://inbound-gate.com/department/collabora

Expected behavior

The public_wopi_url is https://inbound-gate.com/department/collabora

Version of the richdocuments app

8.5.6

Version of Collabora Online

24.04.9.1

How to fix this

I believe the problem comes from here:

https://github.com/nextcloud/richdocuments/blob/3dbbe03d4e6a5cf5b0dacc584b3ce47973ab28c8/lib/Service/ConnectivityService.php#L58-L61

Excerpt:

		$determinedUrl = $this->parser->getUrlSrcValue('application/vnd.openxmlformats-officedocument.wordprocessingml.document');
		$detectedUrl = $this->appConfig->domainOnly($determinedUrl);
		$this->appConfig->setAppValue('public_wopi_url', $detectedUrl);

Instead of extracting domainOnly, also the path needs to be extracted.

Start in lib/Service/ConnectivityService.php at the shown public_wopi_url assignment and inspect how the parser result is reduced to a domain. Reproduce the setup with the provided php occ commands, then verify that the stored public_wopi_url preserves /department/collabora instead of only https://inbound-gate.com.