[Bug]: multiple consecutive spaces in folder name breaks folder access

[mrAceT]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

I have a folder with a single quote in it ( ' ) and a plus sign in it ( + ) I expected that to be the problem, but when I created a test folder named te+s't there was not any problem in accessing that folder including its test files.

Then I noticed that the problem folder also contained two spaces. I first tested with one space "t e+s't". That also did not result in any problems. But adding a second space after the first one all access to that folder was lost via the web interface and also the desktop client gave errors (I run windows 10 desktop client version 3.14.0)

Steps to reproduce

1. create a folder with name "t e+s't" (TWO spces between the 't' and the 'e' !)
2. sync via the desktop client
3. see the errors mounting..

Expected behavior

I understand two spaces is a bit odd.. but it can happen.. and should work..

Nextcloud Server version

28

Operating system

RHEL/CentOS

PHP engine version

PHP 8.1

Web server

Apache (supported)

Database engine version

MySQL

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

No response

List of activated Apps

No response

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

I am hesitant to do more testing since I am unable to correct the problem.

I use nextcloud with S3 for data storage. The file id's are there. I simply can't access them. A problem in the DAV connector ?

[sorbaugh]

cc @Pytal also to check if this is an issue on the left side nav bar.

[Pytal]

On 28.0.9 everything seems to work fine with two spaces

Web	Desktop

Can you provide your logfile @mrAceT? I see that you mention using S3 so that might be related

[mrAceT]

That might be? I am unable to rename the folder.. I'm stuc with it.. can anyone give me a tip on how to get rid of it?

As mentionedf I use S3, is there a way to edit the database to correct this problem? It also seems to brick the sync with my workstation every now and then.. (also renaming here does not work)

[Pytal]

Could you provide the logs @mrAceT?

[mrAceT]

That's the odd thing.. I don't see any errors regarding this in the nexcloud.log? (or should I set a higher loglevel? (how?) )

[Pytal]

You can configure it in config.php, see https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/config_sample_php_parameters.html#loglevel

[mrAceT]

Which loglevel is needed?

[Pytal]

>=2 will show warnings which should be sufficient and should be the default

[Pytal]

Are you able to delete or rename the folder from the web UI?