Image files with repeated extension jpeg/jpg or upper case extension JPG/JPEG files are converted to PNG after editing

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 DXP FP63, 7.0.X, 7.1.1 CE GA2, 7.1.X, Master
• Fix Version/s: 7.0.0 DXP FP67, 7.0.X, 7.1.10 DXP FP5, 7.1.10.1 SP1, 7.1.2 CE GA3, 7.1.X, Master
• Component/s: Image Editor
• Labels:
  • QA-V
  • ee-ts
  • liferay-dxp-70-sp10
  • liferay-dxp-71-sp1
  • liferay-fixpack-de-67-7010
  • liferay-fixpack-dxp-5-7110
• Branch Version/s:
  7.1.x, 7.0.x
• Backported to Branch:
  Committed
• Story Points: 0.25
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/65446

Repeat the following steps with the attached three same Chevrolet images.
The difference are, one has upper case extension name; one has repeated extension name; one has regular extension name;

1. Go to Document and Media Admin
2. Add a basic document with the Chevroletfile, and save
3. Verify that in $LIFERAY_HOME/data/document_library/xxxx/$SITE_ID/$LATEST_FOLDER, there is file of version 1.0.
4. use any image viewer to check it's MIMEType, should be JPEG/JPG
5. Come back to DM, click the 3 dots of the image file, and select edit with image editor
6. Do any editing, for example, cropping, and save

Expected: go to step 3, there should a new version of the file 1.1, use any image viewer to check it's MIMEType, should also be JPEG/JPG
Real: go to step 3, there should a new version of the file 1.1, use any image viewer to check it's MIMEType, is PNG

The ones with upper case extension and repeated extension are converted to PNG files.