Thymeleaf: "Template mode "TEXT" has not been configured

spring-boot:1.5.2 w/ spring-boot-starter-thymeleaf

I need to write an @Controller that will deliver a .txt file to a third party commercial application. This seems harder than it should.

According to https://docs.spring.io/spring-boot/docs/current/reference/html/common-application-properties.html under # THYMELEAF I require the following properties:

--spring.thymelead.content-type=text/plain
--spring.thymeleaf.mode=TEXT
--spring.thymeleaf.suffix=.txt

This does not result in the downloading of my src/main/resources/templates/updates.txt with run-time values applied but an error page telling me that “TEXT” has not been configured.

I was hoping given the available configuration properties and thymeleaf’s claim that everything works “out of the box” this would be all that was required. It seems not 😦

[jmkgreen]

For anyone else hitting this problem it is because spring-boot:1.5 depends on thymeleaf 2.x which does not support more than XML and HTML.

[philwebb]

Or https://docs.spring.io/spring-boot/docs/1.5.x/reference/htmlsingle/ is you want the latest 1.5 release.