How to pass http headers to GET request in Spring RestTemplate

Question

I am writing client side REST GET call using Spring RestTemplate. I need to pass http headers to the GET call.

Please find the code snippet:

String url = "http://<hostname>:7001/api?id=231";
ResponseEntity<ResponseObject> getEntity = this.restTemplate.getForEntity(url, ResponseObject.class);
return getEntity .getBody();

org.springframework.http.HttpHeaders headers = new org.springframework.http.HttpHeaders();
headers.set("Accept", "application/xml");
headers.set("username", "ABC");

I need to pass above headers like Accept and username in this REST get call. What code changes are needed for the same so that i can pass headers in RestTemplate.

score 1 · Answer 1 · answered Mar 12 '19 at 08:51

1

getForEntity doesn't support setting headers. Use exchange instead:

HttpHeaders headers = new HttpHeaders();
headers.set("Accept", "application/xml");
headers.set("username", "ABC");

HttpEntity entity = new HttpEntity(headers);

ResponseEntity<ResponseObject> response = restTemplate.exchange(
    url, HttpMethod.GET, entity,ResponseObject.class);

answered Mar 12 '19 at 08:51

Aditya Narayan Dixit

2,105
11
23

This also works. – azaveri7 Mar 12 '19 at 10:19

Sudip Bolakhe · Accepted Answer · 2019-03-12T09:01:57.630

0

Use your code as:

org.springframework.http.HttpHeaders headers = new 
org.springframework.http.HttpHeaders();
headers.set("Accept", "application/xml");
headers.set("username", "ABC");

String url = "http://<hostname>:7001/api?id=231";
ResponseEntity<ResponseObject> getEntity = 
this.restTemplate.exchange(url,HttpMethod.GET,new HttpEntity<>( headers),ResponseObject.class);
return getEntity .getBody();

edited Mar 12 '19 at 09:01

answered Mar 12 '19 at 08:17

Sudip Bolakhe

513
5
16

There is no variation of getForEntity (String, httpHeaders, Object). They have one with passing a Map. I am trying to test getForEntity(String, ResponseObject.class, headers) – azaveri7 Mar 12 '19 at 08:41
Let me edit the solution, please check it. – Sudip Bolakhe Mar 12 '19 at 09:01

score 0 · Answer 3 · answered Mar 12 '19 at 09:56

Generic rest template executor method:

public <T, E extends TIBCOResponse> E executeRequest(HttpMethod method, 
        HttpHeaders httpHeaders, 
        String url,
        T requestBody,
        Map<String, String> paramters, 
        Class<E> clazz) {

    HttpEntity<T> entity = new HttpEntity<>(requestBody, httpHeaders);

    RestTemplate restTemplate = new RestTemplate();

    ResponseEntity<E> response = restTemplate.exchange(url, method, entity, clazz, paramters);

    return response.getBody();
}

Service Method Implementation:

public ResponseObject FuncCallerInsideRest(IntegrationDTO integrationDTO) {

    String OPERATION_URL = "/FindAccountInfo?accountNumber="+integrationDTO.getAccountNumber();
    Map<String, String> parameters = new HashMap<>();
    httpHeaders = new HttpHeaders();

    httpHeaders.set("RetryLimit", "2");
    httpHeaders.set("Authorization", "abcd");
    httpHeaders.set("SessionID", integrationDTO.getSessionID());

    ResponseObject ResponseObject = this.executeRequest(HttpMethod.GET, httpHeaders,
            BASE_URL.concat(PATH_URL.concat(OPERATION_URL)), null, parameters,
            ResponseObject.class);

    return ResponseObject;
}

How to pass http headers to GET request in Spring RestTemplate

3 Answers3