Updated processed images are not used

[hannesbochmann]

Bug description We have RTE fields which contain images with a src like "fileadmin/processed/9/f/csm_image_b87be79882.png". If the image got updated meanwhile and for example the modification date changed, the newly processed file will have a new path as the checksum changes. But this new path is not used if the src attribute doesn't start with a slash.

Steps to reproduce To reproduce the problem:

• create content element with a image in RTE
• make sure the src attribute doesn't start with a slash
• update image through filelist for example by exchanging the file
• remove processed file (e.g. fileadmin/processed/9/f/csm_image_b87be79882.png)
• reload page in FE
• TYPO3 will create a new processed file but ImageRenderingController will return the old deleted processd file leading to a brokem image tag

Expected behavior ImageRenderingController should return the newly processed file.

Environment

• TYPO3 version: 11.5
• PHP version: 8.0
• Extension version: 11.0.9

Documentation Have you checked the readme/documentation?

• [x] Yes, but I couldn't find anything helpful

The problem is caused by the last changes from #197 when the leading slash is added if only a path is given and the file object has another public URL than the src attribute. In this case $imageSource variable needs to be updated with the URL of the newly processed file or the initial src attribute is used. I will provide a PR.

[Gitsko]

The problem should be fixed with version 11.0.14 #233.