Topic on Extension talk:PdfHandler

PDFHandler extension is supposed to allow viewing of pdf files. However, this does not appear to be working as advertised.

We've gone through the troubleshooting area of MediaWiki for this plugin and double-checked the paths to PDF converters. We re-ran the maint scripts for images and image meta. We checked the logs.

There is no indication of errors other than the images not showing up.

MediaWiki 1.35.5
PHP 7.4.27 (fpm-fcgi)
MySQL 5.7.37-0ubuntu0.18.04.1-log
ICU 60.2
Lua 5.1.5
PDF Handler – (16eda4b) 20:58, 2022 January 23

Any help or suggestions would be appreciated.

Wild guess: Some Linux distributions (for example openSUSE) have disabled rendering of PDF files in their default ImageMagick config because it has been a steady source of security issues (for example "ImageTragick"). In openSUSE, you'd need to install the ImageMagick-config-7-upstream package to enable rendering of PDF files.

Note: I don't know if Ubuntu did something similar with the ImageMagick config.

If unsure, test if converting a PDF to an image in the shell works: convert foo.pdf foo.png

I have done this, and still can't get the extension to work. Any other ideas?

..check /etc/ImageMagick-<your_version>/policy.xml 

if <policy domain="coder" rights="none" pattern="PDF" /> means convert is not allowed to perform its job..

you might change rights="read | write"

but you should be aware and responsible of the security risks this might bring (as Cbolts mentioned)