I want to return a simple plain text string as follows:
@RestController
@RequestMapping("/test")
public class TestController {
@ResponseStatus(HttpStatus.OK)
@RequestMapping(value = "/my", method = RequestMethod.GET, produces="text/plain")
public String test() {
return "OK";
}
Problem: I also have a global ContentNegotiation filter as follows:
@Configuration
public class ContentNegotiationAdapter extends WebMvcConfigurerAdapter {
@Override
public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
configurer.favorPathExtension(false)
.favorParameter(true)
.ignoreAcceptHeader(true)
.useJaf(false)
.defaultContentType(MediaType.APPLICATION_XML);
}
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
super.configureMessageConverters(converters);
}
}
Result: whenever I access the spring controller, I'm getting the error:
Could not find acceptable representation
Question: how can I force the controller to return plain text, even though only XML was configured within content negotation (which I have to keep)?
If you remove produces="text/plain"
from the mapping, it returns plain text but the header is set to "application/xml"
. This is probably not desirable.
I tested with the latest version of Spring Boot.
If you are using the version of Spring >= 4.1.2, you can try to use defaultContentTypeStrategy
instead of defaultContentType
, to set the correct content type in the header:
configurer.favorPathExtension(false)
.favorParameter(true)
.ignoreAcceptHeader(true)
.useJaf(false)
.defaultContentTypeStrategy(new ContentNegotiationStrategy() {
@Override
public List<MediaType> resolveMediaTypes(NativeWebRequest nativeWebRequest) throws
HttpMediaTypeNotAcceptableException {
System.out.println("Description:"+nativeWebRequest.getDescription(false));
if (nativeWebRequest.getDescription(false).endsWith("/test/my")) {
return Collections.singletonList(MediaType.TEXT_PLAIN);
}
else {
return Collections.singletonList(MediaType.APPLICATION_XML);
}
}
})
//.defaultContentType(MediaType.APPLICATION_XML)
;