Challenges with purifier module and HTMLPurifier

[gene1wood]

I had challenges getting gallery3 (galleryrevival) working due to the purifier module.

I ended up just removing the gallery3/modules/purifier directory and got it working. I thought I'd report it here in case it is an actual problem.

I followed the steps in the Dockerfile to integrate the gallery3-contrib modules and themes into the installation.

When I run gallery3 though, visiting the site produces this error in the logs

2022-12-03 23:34:24 -08:00 --- error: Error [ 0 ]: Class "HTMLPurifier_Config" not found
/config/gallery3/modules/purifier/helpers/purifier.php [ 24 ]
#0 /config/gallery3/modules/gallery/libraries/SafeString.php(157): purifier::purify()
#1 /config/gallery3/modules/gallery/libraries/SafeString.php(56): SafeString_Core::_purify_for_html()
#2 /config/gallery3/modules/gallery/helpers/MY_html.php(46): SafeString_Core::purify()
#3 /config/gallery3/themes/wind/views/page.html.php(13): html::purify()
#4 /config/gallery3/system/libraries/View.php(318): include('...')
#5 /config/gallery3/system/libraries/View.php(260): View_Core->load_view()
#6 /config/gallery3/modules/gallery/libraries/MY_View.php(75): View_Core->render()
#7 /config/gallery3/system/libraries/View.php(226): View->render()
#8 /config/gallery3/modules/gallery/controllers/albums.php(77): View_Core->__toString()
#9 /config/gallery3/modules/gallery/controllers/albums.php(22): Albums_Controller->show()
#10 [internal function]: Albums_Controller->index()
#11 /config/gallery3/system/core/Kohana.php(302): ReflectionMethod->invokeArgs()
#12 /config/gallery3/system/core/Event.php(208): Kohana_Core::instance()
#13 /config/gallery3/application/Bootstrap.php(67): Event_Core::run()
#14 /config/gallery3/index.php(124): require('...')
#15 {main}

I tried working around this based on this note in the module.info

Enable XSS protection using HTMLPurifier; add ezyang/htmlpurifier: ^4.13 to composer.json and run composer update

By adding it to composer.json and installing it.

This didn't resolve the error for me though.

7 also tried copying the vendored HTMLPurifier from the original gallery3-contribs into the gallery3/modules/purifier/vendor directory. This also didn't work for me.

Finally I tried extracting the standalone package of HTMLPurifier into the gallery3/vendor directory. But I gave up on trying to figure out how to get autoload.php to load in this standalone package.