如何在 POST 请求中传递 Headers 和 request body？

Question

I am using RestTemplate restTemplate.exchange method to POST request to an endpoint. I have OAuth Header and HttpEntity in different file which I want to pass to POST request, in addition to this I also want to pass request to the endpoint.

I was able to successfully pass the headers and request, but not Http entity which contains credentials

 ResponseEntity<String> result = restTemplate.exchange(uri, HttpMethod.POST,
                new HttpEntity<>(request, dataRepo.getHeader()), String.class);

Is there any way I can pass all 3 things

1. HttpEntity

2. HttpHeaders

3. request

Here is my code

@RunWith(MockitoJUnitRunner.class)
@TestPropertySource
public class DataTest {
    @Inject
    private Oauth oauth;

    @Mock
    private DataRepo dataRepo;
    RestTemplate restTemplate = new RestTemplate();

    @Qualifier(OAuth2HttpHeadersBuilder.BEAN_NAME)
    NewHttpHeader headersBuilder;

    @Test
    public void testAddEmployeeSuccess() throws URISyntaxException {

        URI uri = new URI(url);
        Set<String> mockData = Stream.of("A","B").collect(Collectors.toSet());
        String onsString = String.join(",", mockData);

        Map<String, String> requestBody = new HashMap<>();
        requestBody.put("name", onsString);
        JSONObject jsonObject = new JSONObject(requestBody);

        HttpEntity<String> request = new HttpEntity<>(jsonObject.toString(), null);

        ResponseEntity<String> result = restTemplate.exchange(uri, HttpMethod.POST,
                new HttpEntity<>(request, dataRepo.getHeader()), String.class);

        Assert.assertEquals(201, result.getStatusCodeValue());
    }

The below code is in NewHttpHeader.java file which contains Header and HttpEntity

     private HttpEntity<MultiValueMap<String,String>> getHttpEntity() {
            MultiValueMap<String, String> store = new LinkedMultiValueMap<>();
            store.add( "pas", "password" );
            store.add( "name", config.getVaultServiceAccountName() );
            return new HttpEntity<>( store, getHeader() );
        }


        private HttpHeaders getHeader() {
            HttpHeaders httpHeaders = headersBuilder.build();

            httpHeaders.add( HttpHeaders.ACCEPT, ContentType.APPLICATION_JSON.getMimeType() );
            httpHeaders.add( HttpHeaders.CONTENT_TYPE, ContentType.APPLICATION_FORM_URLENCODED.getMimeType() );

            return httpHeaders;
        }
    }

Answer 1

Quoting question:

Is there any way I can pass all 3 things

1. HttpEntity
2. HttpHeaders
3. request

Quoting javadoc of HttpEntity :

Represents an HTTP request or response entity, consisting of headers and body .

So the answer to your question is: Yes , you can pass all 3, since the first is nothing but a combination of the other two.

Just merge your two HttpEntity objects.

Before

HttpEntity<String> request = new HttpEntity<>(jsonObject.toString(), null);

ResponseEntity<String> result = restTemplate.exchange(uri, HttpMethod.POST,
        new HttpEntity<>(request, dataRepo.getHeader()), String.class);

After

HttpEntity<String> request = new HttpEntity<>(jsonObject.toString(), dataRepo.getHeader());

ResponseEntity<String> result = restTemplate.exchange(uri, HttpMethod.POST,
        request, String.class);