Basic Authentication with RestTemplate - compilation error - The constructor HttpClient() is not visible

basic-authentication, http-headers, java, rest, spring

Solution

in the end its much easier to run Basic Authentication using :

restTemplate.exchange()

and not

restTemplate.getForObject()

my code snippet :

private HttpHeaders createHeaders(final String username, final String password ){
    HttpHeaders headers =  new HttpHeaders(){
          {
             String auth = username + ":" + password;
             byte[] encodedAuth = Base64.encodeBase64(
                auth.getBytes(Charset.forName("US-ASCII")) );
             String authHeader = "Basic " + new String( encodedAuth );
             set( "Authorization", authHeader );
          }
       };
       headers.add("Content-Type", "application/xml");
       headers.add("Accept", "application/xml");

       return headers;
}


    RestTemplate restTemplate = new RestTemplate();
    ResponseEntity<MyClass> response;
    httpHeaders = this.createHeaders("user", "pass");

    String url = "www.example.com"
    response = restTemplate.exchange(url, HttpMethod.GET, new HttpEntity<Object>(httpHeaders), MyClass.class);

and it works !

Problem

trying to add basic auth to restTemplate problem I encounter is that i cant initialize : (with both the imports in the code snippet) ``` HttpClient client = new HttpClient(); ``` This code resolves in a compilation error (with no suggestion available from eclipse to fix this issue) 1) what is the problem ? 2) Am i importing the wrong class ? my code snippet : ``` import org.apache.http.client.HttpClient; //OR (not together) import sun.net.www.http.HttpClient; HttpClient client = new HttpClient(); //this line dosent compile UsernamePasswordCredentials credentials = new UsernamePasswordCredentials("USERNAME","PASS"); client.getState().setCredentials( new AuthScope("www.example.com", 9090, AuthScope.ANY_REALM), credentials); CommonsClientHttpRequestFactory commons = new CommonsClientHttpRequestFactory(client); RestTemplate template = new RestTemplate(commons); SomeObject result = template.getForObject( "http://www.example.com:9090/",SomeObject.class ); ``` Running this get the Exception : ``` > failed due to an unhandled exception: java.lang.Error: Unresolved > compilation problems: The constructor HttpClient() is not visible > The method getState() is undefined for the type HttpClient > CommonsClientHttpRequestFactory cannot be resolved to a type > CommonsClientHttpRequestFactory cannot be resolved to a type > SomeObject cannot be resolved to a type The method > getForObject(String, Class<SomeObject>, Object...) from the type > RestTemplate refers to the missing type SomeObject SomeObject cannot > be resolved to a type ```

Original source