Session closed error when performing subsequence requests to client via Spring RestTemplate

Question

I'm trying to use spring rest template to do a post request to login in.

RestTemplate restTemplate = new RestTemplate();

HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);

LinkedMultiValueMap<String, Object> mvm = new LinkedMultiValueMap<String, Object>();
mvm.add("LoginForm_Login", "login");
mvm.add("LoginForm_Password", "password");

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

all goes well, but when I try to send a second request, It generates an error saying :

Business Manager closes your session after 15 minutes

What can I do to solve this problem ?!

Answer 1

When you receive the response in your first request you should store your session id which is received via cookie. You will retrieve it in a set-cookie response header which you can get via:

//first request
RestTemplate template = new RestTemplate();
ResponseEntity<String> forEntity = template.getForEntity("http://google.bg", String.class);
forEntity.getHeaders().get("Set-Cookie").stream().forEach(System.out::println);

then in every subsequent request you should set the Cookie request header with the values received in the first request:

//subsequent request
RestTemplate restTemplate = new RestTemplate();
HttpHeaders headers = new HttpHeaders();
headers.set("Cookie",cookies.stream().collect(Collectors.joining(";")));
HttpEntity<String> entity = new HttpEntity<String>(headers);
restTemplate.exchange("http://url", HttpMethod.POST, entity, String.class);