Resttemplate url response giving Invalid mime type

Question

I am callling a url like below, but in the response i am getting the Invalid mime type "JSON; charset=utf-8": does not contain '/'

   @RequestMapping("/")
       public String hello(){

           HttpHeaders headers = new HttpHeaders();
           UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl("http://XXXX/Query.ashx");
           HttpEntity<?> entity = new HttpEntity<>(headers);
           RestTemplate restTemplate = new RestTemplate();
           HttpEntity<String> response = restTemplate.exchange(
                   builder.toUriString(),
                   HttpMethod.GET,
                   entity,
                   String.class);

           return  response.getBody() ;
       }

From postman i checked the response headers of the api, there we are getting Content-Type: JSON; charset=utf-8, which i am getting here. How to handle this?, we we just want plain json response.

Answer 1

Use '@RestController' annotation

Answer 2

@Himanshu Kindly provide complete class information which contain class level annotations. Along with that question is Are you getting exception while calling shown api or restTemplate.exchange? . Update your answer with complete stacktrace to find that.

I would prefer to use @GetMapping which is default to Json Response. Please try that

Answer 3

You can completely control request/response parameters using RestTemplate interceptor(s):

public class MimeInterceptor implements ClientHttpRequestInterceptor {

    @Override
    public ClientHttpResponse intercept(final HttpRequest request, final byte[] body,
            final ClientHttpRequestExecution execution) throws IOException {
        request.getHeaders().add(HttpHeaders.CONTENT_TYPE, MediaType.<what you want>);
        ClientHttpResponse response = execution.execute(request, body);
        response.getHeaders().add(HttpHeaders.CONTENT_TYPE, MediaType.<what you want>);
        return response;
    }
}

And in code:

...
RestTemplate restTemplate = new RestTemplate();
restTemplate.setInterceptors(List.of(new MimeInterceptor());
...