The purpose of this project is to demonstrate an encoding problem introduced in grails 4.0.4.

In general, this is a blank application using all defaults. It was created with grails create-app.

Important files

• index.gsp - This should output "Test(line break)String"
• gradle.properties - Change version from 4.0.3 to 4.0.4 to reproduce problem
• DemoCodec - A simple codec that outputs HTML
• application.yml - Sets default output encoding around line 78

General Approach

Change grails version in gradle.properties. No other changes are needed.

grails-4.0.3

• Run the application with run-app and note that the index page shows "Test(line break)String" on two lines. The HTML output from the codec is not encoded.
• Run gradle tasks clean (just to be sure) and assemble. Run the resulting jar. Note that the index page shows the same thing as before.

grails-4.0.4

• Same output from run-app
• When using clean, assemble, and running the resulting jar, the index page output shows the text "Test<br/>String" with the HTML encoded.