Basic Authentication with Resteasy client
Consider the solution from Adam Bien:
You can attach an ClientRequestFilter
to the RESTEasy Client
, which adds the Authorization
header to the request:
public class Authenticator implements ClientRequestFilter {
private final String user;
private final String password;
public Authenticator(String user, String password) {
this.user = user;
this.password = password;
}
public void filter(ClientRequestContext requestContext) throws IOException {
MultivaluedMap<String, Object> headers = requestContext.getHeaders();
final String basicAuthentication = getBasicAuthentication();
headers.add("Authorization", basicAuthentication);
}
private String getBasicAuthentication() {
String token = this.user + ":" + this.password;
try {
return "Basic " +
DatatypeConverter.printBase64Binary(token.getBytes("UTF-8"));
} catch (UnsupportedEncodingException ex) {
throw new IllegalStateException("Cannot encode with UTF-8", ex);
}
}
}
Client client = ClientBuilder.newClient()
.register(new Authenticator(user, password));
One can use org.jboss.resteasy.client.jaxrs.BasicAuthentication
which is packaged with resteasy-client 3.x and is meant specifically for basic authentication.
Client client = ClientBuilder.newClient();
ResteasyWebTarget resteasyWebTarget = (ResteasyWebTarget)client.target("http://mywebservice/rest/api");
resteasyWebTarget.register(new BasicAuthentication("username", "passwd"));
You can add a raw authorization header to your REST client by invoking .header(HttpHeaders.AUTHORIZATION, authHeader)
in your client configuration.
The credentials must be packed in authorization header in the format of "user:pass", encoded as base64 byte array and then appended to the string "Basic " which identifies basic auth.
This is the whole snippet (inspired by this post on baeldung)
String auth = userName + ":" + password;
byte[] encodedAuth = Base64.encodeBase64(auth.getBytes(Charset.forName("ISO-8859-1")));
String authHeader = "Basic " + new String(encodedAuth);
authToken = restClient.target(restApiUrl + loginPath)
.request()
.accept(MediaType.TEXT_PLAIN)
.header(HttpHeaders.AUTHORIZATION, authHeader)
.get(String.class);
This worked for me in a Resteasy client. For information, when testing this with wget I had to use the --auth-no-challenge
flag.