Support image upload plugin for CKEditor5

I've created a MR to resolve this; https://git.drupalcode.org/project/clamav/-/merge_requests/7. The CKEditor plugin doesn't pass through the tmp path in the file object but we can access the same values from the request object.

This appears to be a core issue, and should probably be patched in there.

Also:

+    if (!is_resource($file_handler)) {
+      // @see Drupal\ckeditor5\Controller\CKEditor5ImageController
+      $upload = \Drupal::request()->files->get('upload');
+      $file_handler = fopen($upload->getRealPath(), 'r');
+    }
+

Seems like it'd throw an exception if $upload doesn't resolve to an object.

A MR and patch for core targetting D10.1 is available here 📌 Make CKEditor5ImageController reuse FileUploadHandler Active .