How do I get the headers from a HttpResponse with Spring resttemplate and androidannotations in case of an Error?

Question

How do I get the headers from a HttpResponse with Spring resttemplate and androidannotations in case of an Error?

I know how to get them in case of no error but I need them in the errorcase because the api I want to use sends a minorstatuscode to clearify the httpstatuscode.

Answer 1

Basically I found a solution.

The RestClient

@Rest(rootUrl = "https://proji.at/japi/v1", converters = { MappingJackson2HttpMessageConverter.class }, interceptors = { HttpBasicAuthenticatorInterceptor.class })
public interface ProjiRestClient extends RestClientErrorHandling {
    RestTemplate getRestTemplate();
}

The ErrorHandler:

@EBean
public class ProjiResponseErrorHandler implements ResponseErrorHandler {
    private static final String TAG = "ProjiResponseErrorHandler";

    @Override
    public void handleError(ClientHttpResponse response) throws     IOException {
        int minor = 0;
        try {
            minor = Integer.parseInt(response.getHeaders().    getFirst("minor"));
        } catch (Exception e) {
            // TODO: handle exception
        }
        Log.i(TAG, "Response statuscode: " + response.getStatusCode() +     " minor: "
                + response.getHeaders().getFirst("minor"));

        throw new HttpMethodException(response.getStatusCode().value(),     minor);
    }

    @Override
    public boolean hasError(ClientHttpResponse response) throws     IOException {

        Log.i(TAG, "Response statuscode: " + response.getStatusCode());
        if (response.getStatusCode().value() >= 400) {
            return true;
        }
        return false;
    }

}

The Fragment that uses the RestClient:

@RestService
ProjiRestClient restClient;
@Bean
ProjiResponseErrorHandler projiErrorhandler;

@AfterInject
void afterInject() {
    restClient.getRestTemplate().setErrorHandler(projiErrorhandler);
}

And off you go calling methods from the restClient.

ResponseEntity<User> respone = restClient.getAuth(auth);

If anyone knows a better solution, I'd be pleased to hear from it.