There are multiple ways to add the basic HTTP authentication to the RestTemplate
.
1. For a single request
try {
// request url
String url = "https://jsonplaceholder.typicode.com/posts";
// create auth credentials
String authStr = "username:password";
String base64Creds = Base64.getEncoder().encodeToString(authStr.getBytes());
// create headers
HttpHeaders headers = new HttpHeaders();
headers.add("Authorization", "Basic " + base64Creds);
// create request
HttpEntity request = new HttpEntity(headers);
// make a request
ResponseEntity<String> response = new RestTemplate().exchange(url, HttpMethod.GET, request, String.class);
// get JSON response
String json = response.getBody();
} catch (Exception ex) {
ex.printStackTrace();
}
If you are using Spring 5.1
or higher, it is no longer required to manually set the authorization header. Use headers.setBasicAuth()
method instead:
// create headers
HttpHeaders headers = new HttpHeaders();
headers.setBasicAuth("username", "password");
2. For a group of requests
@Service
public class RestService {
private final RestTemplate restTemplate;
public RestService(RestTemplateBuilder restTemplateBuilder) {
this.restTemplate = restTemplateBuilder
.basicAuthentication("username", "password")
.build();
}
// use `restTemplate` instance here
}
3. For each and every request
@Bean
RestOperations restTemplateBuilder(RestTemplateBuilder restTemplateBuilder) {
return restTemplateBuilder.basicAuthentication("username", "password").build();
}
I hope it helps!
curl -u fred:fred
, no need for clunky manual headers. The same goes for Spring. – divanov