Force Spring RestTemplate to use XmlConverter

Question

We are integrating with a third party that is sending xml with the content-type header as text/html. We were planning on using Spring\'s RestTemplate to map it to classes we

Answer 1

I did not see an example posted of how to actually do this with a custom interceptor, so here is one for reference sake:

public class MyXmlInterceptor implements ClientHttpRequestInterceptor {

@Override
public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException {
    ClientHttpResponse response = execution.execute(request, body);
    HttpHeaders headers = response.getHeaders();

    // you'd want to check if the value needs to be changed
    if (headers.containsKey("Content-Type")) {
        headers.remove("Content-Type");
    }

    headers.add("Content-Type", "application/xml");

    return response;
}

Then, you would need to add the interceptor to your RestTemplate object:

RestTemplate t = new RestTemplate();
t.getInterceptors().add(new MyXmlInterceptor());

Answer 2

Can you change the content-type header before unmarshalling happens, by adding a custom interceptor http://static.springsource.org/spring/docs/current/javadoc-api/org/springframework/http/client/ClientHttpRequestInterceptor.html ?

Answer 3

The solution we implemented was to add a Jaxb2RootElementHttpMessageConverter with MediaType.TEXT_HTML to the RestTemplate HttpMessageConverters. It's not ideal since it creates a redundant jaxb message converter but it works.

RestTemplate restTemplate = new RestTemplate();
List<HttpMessageConverter<?>> messageConverters = new ArrayList<HttpMessageConverter<?>>();
Jaxb2RootElementHttpMessageConverter jaxbMessageConverter = new Jaxb2RootElementHttpMessageConverter();
List<MediaType> mediaTypes = new ArrayList<MediaType>();
mediaTypes.add(MediaType.TEXT_HTML);
jaxbMessageConverter.setSupportedMediaTypes(mediaTypes);
messageConverters.add(jaxbMessageConverter);
restTemplate.setMessageConverters(messageConverters);