public class GetRequest {

public static String generateAuthHeader(String dataToSign, String secret) {

String hash = "";

try {

Mac sha256_HMAC = Mac.getInstance("HmacSHA256");

SecretKeySpec secret_key = new SecretKeySpec(secret.getBytes(), "HmacSHA256");

sha256_HMAC.init(secret_key);

hash = Base64.encodeBase64String(sha256_HMAC.doFinal(dataToSign.getBytes()));

} catch (Exception e) {

System.out.println("Error");

}

return (hash);

}

// A simple request to create a Case using Http Get

public static void main(String[] args) throws Exception {

CloseableHttpClient httpclient = HttpClients.createDefault();

try {

Date now = new Date();

//format for date string Mon, 27 Mar 2017 15:19:36 GMT

DateFormat df = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z");

df.setTimeZone(TimeZone.getTimeZone("GMT"));

String date = df.format(now);

String gatewayurl = "/v2/";

String gatewayhost = "api-worldcheck.refinitiv.com";

String apikey = "XXXXXXXXX-XXXX-XXXX-XXXXX-e5ac69bef305";

String apisecret = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";

String dataToSign = "(request-target): get " + gatewayurl + "groups\n"

+ "host: " + gatewayhost + "\n"

+ "date: " + date;

String hmac = generateAuthHeader(dataToSign, apisecret);

String authorisation = "Signature keyId=\"" + apikey + "\",algorithm=\"hmac-sha256\",headers=\"(request-target) host date\",signature=\"" + hmac + "\"";

System.out.println("dataToSign " + dataToSign + "-----------------");

System.out.println("hmac " + hmac);

//System.out.println(authorisation);

HttpGet httpGet = new HttpGet("https://api-worldcheck.refinitiv.com/v2/groups");

httpGet.addHeader("Authorization", authorisation);

httpGet.addHeader("Cache-Control", "no-cache");

httpGet.addHeader("date", date);

CloseableHttpResponse response1 = httpclient.execute(httpGet);

try {

HttpEntity entity1 = response1.getEntity();

System.out.println(response1.getStatusLine());

String json = EntityUtils.toString(response1.getEntity());

System.out.println("entity1 " +entity1);

System.out.println("json" + json);

ObjectMapper mapper = new ObjectMapper();

//StatusResponses loginValidator = null;

ObjectMapper objectMapper = new ObjectMapper();

objectMapper.configure(Feature.AUTO_CLOSE_SOURCE, true);

Object jsonObj = objectMapper.readValue(json, Object.class);

String indented = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(jsonObj);

System.out.println(indented);

EntityUtils.consume(entity1);

} finally {

response1.close();

}

} finally {

httpclient.close();

}

}

}