PDF viewer problems

[Blaupause]

Hey,

We’re having a problem displaying PDF files in the browser and in the app.

Some files work. The majority, however, don’t. When you download the files, you can open and view them normally. I can’t see any errors.

As a test, I completely disabled encryption. I also disabled and re-enabled the PDF viewer.

I see the following message in the developer console:

Invalid or corrupted PDF file

PDF.js v3.11.174 (build: ce8716743)
Message: Invalid PDF structure.

We’re working with Nextcloud Hub 9 (30.0.5)

What can we do?

Best regards,
Matthias

[rakekniven]

Hey,

please update to latest NC 30.x release.
PDF viewer is part of the server bundle.

Mozilla put a lot of effort into pdf.js

See date of Release v3.11.174 · mozilla/pdf.js · GitHub

Just an idea and report back.

Cheers

[Blaupause]

Hey rakekniven,

I successfully installed the latest version (31.0.3).

Unfortunately, the error message persists:

Invalid or corrupted PDF file

PDF.js v4.0.189 (Build: 50f52b43a)
Message: Invalid PDF structure.

What else can I do?

Regards
Matthias

[jtr]

Can you confirm you have the same problem when using pdf.js via the demo:

PDF.js viewer

Click in the upper right (may need to expand the menu) and select Open.

[Blaupause]

I can open the link normally. A PDF opens in the Edge browser.

[jtr]

Did you use the demo to try opening one of the problematic PDF documents?

[Blaupause]

Sorry, I don’t think I understand exactly what I’m supposed to do.
Can you explain it to me again?

[jtr]

When you visit the demo link for PDF.js I posted, use the Open menu option in it to try to open up one of the PDF files that you are experiencing problems with.

[Blaupause]

I’ve since found the problem. A NAS server was using an app to upload data to the Nextcloud server, and the data was also encrypted during transport. After disabling it, it now works perfectly. Thank you!