I'm trying to have spring automatically return HTTP Status 204 when the controller method response type is void
. Ex:
Let's say I have a controller method like this:
@DeleteMapping(value = "/{heroId}")
public void delete(@PathVariable Long heroId) {
heroService.delete(heroId);
}
I'm looking for a way to automatically return 204 without having to annotate the method with @ResponseStatus(value = HttpStatus.NO_CONTENT)
.
Is it possible to do this with a handler or AOP or some other facility?
PS. I see this answer, Return HTTP 204 on null with spring @RestController , but does not answer my specific question on how this can be implemented for methods with a void
return type. Also, this method should work with a method that has no input arguments.
I was able to implement a solution based on the link provided by Yoshua. I'm not 100% sure on the implementation details, but it's working for me.
This captures the response from all of the controller methods that have a return type of void
and changes their HTTP Status to 204.
import org.springframework.core.MethodParameter;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;
@ControllerAdvice
public class NoContentControllerAdvice implements ResponseBodyAdvice<Void> {
@Override
public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
if(returnType.getParameterType().isAssignableFrom(void.class)) {
return true;
}
return false;
}
@Override
public Void beforeBodyWrite(Void body, MethodParameter returnType, MediaType mediaType,
Class<? extends HttpMessageConverter<?>> converterType, ServerHttpRequest request, ServerHttpResponse response) {
if(returnType.getParameterType().isAssignableFrom(void.class)) {
response.setStatusCode(HttpStatus.NO_CONTENT);
}
return body;
}
}
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