Bug: External Share Links - Files Cannot Be Viewed/Previewed in Browser

[hakunamatata]

Summary

When a personal folder is shared via a public link, external recipients can view the folder structure and download files, but they cannot preview or open files within the browser. Attempting to do so triggers server errors, broken image links, or forced downloads.

Environment

Instance: Cubby 2.7.5
Integration: Collabora Online 25.04.9.2.1
OS: Mac OS Tahoe 26.3
Browser: Safari / Brave Browser

Steps to Reproduce

• Create a new personal folder and upload various file types (PDF, Image, Excel).
• Generate a public share link for the folder.
• Open the link in an Incognito/Private browser window (simulating an external entity).
• Attempt to open/view any of the files directly in the browser.

Actual Results

PDF Files: Fails to open with a JSON error:

Images: The image fails to render, showing only a broken image/missing asset icon.

Excel/Office Files: The browser prompts for a download immediately instead of opening the file in the connected Collabora instance.

Expected Results

External users should be able to preview PDFs and images directly in the browser and view Office documents via the Collabora integration without being forced to download them first.

[nebulon]

Thanks for all the issue reports. So far the app was mostly developed for my own use-cases, but always with the intention to support a wide variety, so you are hitting those paths which I don't use. But we will fix all those.

[nebulon]

This is mostly fixed now with https://git.cloudron.io/apps/cubby/-/commit/cc04b78f7117d32d2b019ab2849c5c8ef3c4483e

Still fixing the ability for an external user to rename toplevel files in a share.

[nebulon]

Currently sharing folders/files for external users via share link, always creates read-only shares. To add read-write ability I have created https://git.cloudron.io/apps/cubby/-/issues/101

[nebulon]

New package is published with those things fixed.

[hakunamatata]

Thanks for the quick turnaround! PDFs and image are working fine but office files are still prompting a download instead of opening. I wonder if this is a limitation of Collabora or if there is permission issue somewhere? I have tried both read only and read-write external share links.

[nebulon]

good catch, haven't tested the collabora integration, but probably just an oversight. Will fix this also