How do I read HTTP status code from RestTemplate?

Question

I call Rest API using RestTemplate. Response don't has any issues.I need to get HTTP status code Like this.

Request is ok- 200

Unauthorized - 400

According to many post I met bellow answer.

RestTemplate template = new RestTemplate();
HttpEntity<String> response = template.exchange(url, HttpMethod.POST, request, String.class);

String resultString = response.getBody();
HttpHeaders headers = response.getHeaders();

In here used exchange method to get response.(template.exchange....) But I used

postForObject method

This is my code

public BalanceCheckResponse accountTotal(String counterAlias, String counterAuth, String subscriberType,
        String subscriberValue, String accessMode, String token) {
    
    BalanceCheckResponse objResponse = new BalanceCheckResponse();

    try {
        
        BalanceCheckRequest objRequest = new BalanceCheckRequest();
        objRequest.setCounterAlias(counterAlias);
        objRequest.setCounterAuth(counterAuth);
        objRequest.setSubscriberType(subscriberType);
        objRequest.setSubscriberValue(subscriberValue);
        objRequest.setAccessMode(accessMode);

        RestTemplate rstTemp = new RestTemplate();
        final String url = "https://ideabiz.lk/apicall/startpoint/v1/balanceCheck";
        List<HttpMessageConverter<?>> messageConverters = new ArrayList<HttpMessageConverter<?>>();
        MappingJackson2HttpMessageConverter map =new MappingJackson2HttpMessageConverter();
        messageConverters.add(map);
        //messageConverters.add(new StringHttpMessageConverter());
        rstTemp.setMessageConverters(messageConverters);

        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        headers.add("Authorization", "Bearer "+token);

        HttpEntity<BalanceCheckRequest> entity = new HttpEntity<BalanceCheckRequest>(objRequest,headers);
        objResponse = rstTemp.postForObject(url,entity, BalanceCheckResponse.class  );
        
        
    } catch (Exception e) {
        e.printStackTrace();
    }
    System.out.println(objResponse.getCurrentBalance());
    return objResponse;

}

In my code

objResponse.getHeaders();

show error. What can I do in here. Do you have idea?

Hi, where do you call `objResponse.getHeaders();`? It looks like `objResponse`is an `BalanceCheckRequest` object? — kkflf, Mar 28 '17 at 11:12
Its not. objResponseis is an BalanceCheckResponse object.I called it under objResponse = rstTemp.postForObject(url,entity, BalanceCheckResponse.class ); line.Thank you for your comment kkflf — Priyantha, Mar 28 '17 at 11:14

score 5 · Answer 1 · answered Mar 28 '17 at 11:18

By default, RestTemplate uses a DefaultResponseErrorHandler, which throws an exception if you do not receive back one of the responses that are considered as successful. This means that in the event of an error, your e.printStackTrace(); statement will print a stack trace. (Which will most probably go unnoticed.)

If that's not good enough for you, then there is a number of ways to circumvent that behavior, one of them is by supplying your own error handler using setErrorHandler( ResponseErrorHandler errorHandler ).

Thank you Mike Nakis.I already used e.printStackTrace();. But I needed to get that error with efferent way. — Priyantha, Mar 28 '17 at 11:32

score 3 · Answer 2 · answered Mar 28 '17 at 11:18

3

The return value of the postForObject method is the data from the received response that is deserialized to the given class, in your case BalanceCheckResponse.

If you need access to both returned data and status, use postForEntity like this:

ResponseEntity<BalanceCheckResponse> responseEntity = rstTemp.postForEntity(url, entity, BalanceCheckResponse.class);
objResponse = responseEntity.getBody();
HttpStatus status = responseEntity.getStatusCode();

answered Mar 28 '17 at 11:18

Bewusstsein

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This is true only if the call is a success – Mar 28 '17 at 11:19
Thank you Bewusstsein.You saved my time.I got answer. – Priyantha Mar 28 '17 at 11:29
Thank you RC.Your correct this is true only if the call is a success. Dou you have good an idea for this. – Priyantha Mar 29 '17 at 04:34

How do I read HTTP status code from RestTemplate?

2 Answers2