Apache HttpClient Digest authentication

Question

Basically what I need to do is to perform digest authentication. First thing I tried is the official example available here. But when I try to execute it(with some small ch

Answer 1

private static byte[] downloadFileWithDigitAuth(String url, String username, String password) {
    byte[] bytes = null;
    CloseableHttpClient httpClient = HttpClientBuilder.create().build();
    HttpGet httpGet = new HttpGet(url);
    HttpContext httpContext = new BasicHttpContext();
    CloseableHttpResponse httpResponse = null;
    try {
        httpResponse = httpClient.execute(httpGet, httpContext);

        if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_UNAUTHORIZED) {
            Header authHeader = httpResponse.getFirstHeader(AUTH.WWW_AUTH);
            DigestScheme digestScheme = new DigestScheme();

            /*
            override values if need
            No need override values such as nonce, opaque, they are generated by server side
            */
            digestScheme.overrideParamter("realm", "User Login Required !!");
            digestScheme.processChallenge(authHeader);

            UsernamePasswordCredentials creds = new UsernamePasswordCredentials(username, password);
            httpGet.addHeader(digestScheme.authenticate(creds, httpGet, httpContext));

            httpResponse.close();
            httpResponse = httpClient.execute(httpGet);
        }
        bytes = IOUtils.toByteArray(httpResponse.getEntity().getContent());
    } catch (IOException | MalformedChallengeException | AuthenticationException e) {
        e.printStackTrace();
    }
    finally {
        if (httpResponse != null) {
            try {
                httpResponse.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return bytes;
}

Gradle :

compile group: 'org.apache.httpcomponents', name: 'httpclient', version: '4.5.12'
compile group: 'commons-io', name: 'commons-io', version: '2.6'