[Bug]: Downloading multiple Files from recent Files in webgui results in empty Zip

[eHeinrich-wsa]

⚠️ 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

When downloading multiple Files from recent files an empty zip file gets downloaded. When downloading the same files from the actual folder it works as expected. Possibly because the download url does not include the directory for the files.
When downloading from recent files:
/apps/files/ajax/download.php?dir=/&files= etc.
When downloading from actual folder:
/apps/files/ajax/download.php?dir=/Foldername&files= etc.

Steps to reproduce

1. Go to recent Files
2. Select multiple Files
3. Click Download
4. Receive empty Zip File

Expected behavior

Download Zip Folder with selected Files

Nextcloud Server version

28

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.1

Web server

Apache (supported)

Database engine version

PostgreSQL

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

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "28.0.11.1",
        "overwriteprotocol": "https",
        "htaccess.RewriteBase": "\/",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauthtype": "PLAIN",
        "mail_smtpauth": 1,
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpsecure": "tls",
        "default_phone_region": "DE",
        "default_locale": "de_DE",
        "default_language": "de",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0
        },
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "debuglevel": 0,
        "updater.release.channel": "stable",
        "theme": "",
        "loglevel": 1,
        "log_rotate_size": 20971520,
        "maintenance": false,
        "maintenance_window_start": 1,
        "enabledPreviewProviders": {
            "0": "OC\\Preview\\Movie",
            "1": "OC\\Preview\\PNG",
            "2": "OC\\Preview\\JPEG",
            "3": "OC\\Preview\\GIF",
            "4": "OC\\Preview\\BMP",
            "5": "OC\\Preview\\XBitmap",
            "6": "OC\\Preview\\MP3",
            "7": "OC\\Preview\\MP4",
            "8": "OC\\Preview\\TXT",
            "9": "OC\\Preview\\MarkDown",
            "10": "OC\\Preview\\HEIC",
            "11": "OC\\Preview\\Font",
            "12": "OC\\Preview\\Illustrator",
            "14": "OC\\Preview\\MSOffice2003",
            "15": "OC\\Preview\\MSOffice2007",
            "16": "OC\\Preview\\MSOfficeDoc",
            "17": "OC\\Preview\\PDF",
            "18": "OC\\Preview\\Photoshop",
            "19": "OC\\Preview\\Postscript",
            "20": "OC\\Preview\\StarOffice",
            "21": "OC\\Preview\\SVG",
            "22": "OC\\Preview\\TIFF",
            "23": "OC\\Preview\\EMF",
            "24": "OC\\Preview\\OpenDocument"
        },
        "preview_libreoffice_path": "\/usr\/bin\/libreoffice",
        "preview_ffmpeg_path": "\/usr\/bin\/ffmpeg",
        "preview_max_x": 4096,
        "preview_max_y": 4096,
        "app.mail.imap.timeout": 240
    }
}

List of activated Apps

Enabled:
  - activity: 2.20.0
  - breezedark: 28.0.1
  - bruteforcesettings: 2.8.0
  - calendar: 4.7.16
  - cloud_federation_api: 1.11.0
  - comments: 1.18.0
  - contacts: 5.5.3
  - contactsinteraction: 1.9.0
  - dav: 1.29.2
  - federatedfilesharing: 1.18.0
  - files: 2.0.0
  - files_automatedtagging: 1.18.0
  - files_pdfviewer: 2.9.0
  - files_reminders: 1.1.0
  - files_retention: 1.17.2
  - files_sharing: 1.20.0
  - files_trashbin: 1.18.0
  - files_versions: 1.21.0
  - forms: 4.3.1
  - groupfolders: 16.0.10
  - guests: 3.0.1
  - impersonate: 1.15.0
  - logreader: 2.13.0
  - lookup_server_connector: 1.16.0
  - mail: 3.7.8
  - nextcloud_announcements: 1.17.0
  - notifications: 2.16.0
  - oauth2: 1.16.4
  - password_policy: 1.18.0
  - photos: 2.4.0
  - polls: 7.2.4
  - previewgenerator: 5.6.0
  - privacy: 1.12.0
  - provisioning_api: 1.18.0
  - recommendations: 2.0.0
  - related_resources: 1.3.0
  - richdocuments: 8.3.11
  - richdocumentscode: 24.4.702
  - serverinfo: 1.18.0
  - settings: 1.10.1
  - sharebymail: 1.18.0
  - support: 1.11.1
  - survey_client: 1.16.0
  - systemtags: 1.18.0
  - text: 3.9.2
  - theming: 2.3.0
  - twofactor_backupcodes: 1.17.0
  - unroundedcorners: 1.1.3
  - updatenotification: 1.18.0
  - viewer: 2.2.0
  - workflowengine: 2.10.0
Disabled:
  - admin_audit: 1.18.0 (installed 1.17.0)
  - circles: 28.0.0 (installed 24.0.0)
  - dashboard: 7.8.0 (installed 7.4.0)
  - encryption: 2.16.0
  - event_update_notification: 2.4.0 (installed 2.4.0)
  - federation: 1.18.0 (installed 1.14.0)
  - files_external: 1.20.0 (installed 1.16.1)
  - files_rightclick: 0.15.1 (installed 1.6.0)
  - firstrunwizard: 2.17.0 (installed 2.13.0)
  - suspicious_login: 6.0.0
  - twofactor_totp: 10.0.0-beta.2
  - user_ldap: 1.19.0
  - user_status: 1.8.1 (installed 1.4.0)
  - weather_status: 1.8.0 (installed 1.4.0)

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

No response

[Kieltux]

I can confirm this bug with Nextcloud 29.0.8.
Download more than one selected file from "Recent Files" results in an empty .zip file.
The download.zip is everytime just 98 bytes and without content.

[Hoeze]

Same issue here. Nextcloud Hub 9 (30.0.1), from official docker image.

[skjnldsv]

cc @susnux didn't we address that already a few weeks ago?

[joshtrichards]

Fixed in #48098

[Kieltux]

Just updated to Nextcloud 29.0.9 (Release 07.11.2024) and the result is still an empty zip.
Is this only fixed in future versions? Maybe only in Nextcloud 31, which is not released so far?
Thank you.

[joshtrichards]

Since this was resolved as part of a new feature addition, it's only in the upcoming v31 code base.

[susnux]

For 30 and before we should fix this if there is time for it and until 31 is released.

[skjnldsv]

Was it working before?
Or did we just add the feature unknowingly because of the new file action?