Unable to access REST API’s in Camunda - rest

Question

In our project , we are trying to use camunda BPMN. using camunda standalone distro and deployed and running in Tomcat.
login as a admin user and able to access cockpit and task lists.But,when we try access the APIs using a Java client . we are getting an unauthorized (401) error. Though we are sending JSESSIONID as a “Cookie”
Tried both DefaultHttpClient and HttpURLConnection - It didn’t work out
Note : JSESSIONID is retrieved by calling the login api with admin username and password.
Help me to solve the issue
Attached below is the java client code
public static void main(String[] args) {
CamundaBMPNClient bpmnClient = new CamundaBMPNClient();
Map<Integer, String> cookieHeader = bpmnClient.getCookieHeader();
bpmnClient.getListofTasks(cookieHeader);
}
public Map<Integer, String> getCookieHeader() {
String jSessionID = null;
Map<Integer, String> headerValues = new HashMap<Integer, String>();
HttpClient httpClient = HttpClientBuilder.create().build();
HttpPost request = new HttpPost(
"http://localhost:8090/camunda-webapp-tomcat-standalone-7.2.0/"
+ "api/admin/auth/user/default/login/cockpit");
request.addHeader("content-type", "application/x-www-form-urlencoded");
request.addHeader("Accept", "application/json");
String jsonString = new Gson()
.toJson("username=admin&password=admin#123");
StringEntity params;
try {
params = new StringEntity(jsonString);
request.setEntity(params);
HttpResponse response = httpClient.execute(request);
Header[] cookieheader = response.getHeaders("Set-Cookie");
for (Header s : cookieheader) {
// Do your stuff here
System.out.println(s.getValue());
String[] str = s.getValue().split(";");
int i = 1;
for (String s1 : str) {
headerValues.put(i, s1.trim());
i++;
}
}
System.out.println("jSessionID::" + jSessionID);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return headerValues;
}
public void getListofTasks(Map<Integer, String> cookieHeader) {
int id = 0;
// DefaultHttpClient httpclient = new DefaultHttpClient();
HttpPost request = new HttpPost(
"http://localhost:8090/camunda-webapp-tomcat-standalone-7.2.0/api/engine/engine/default/task");
request.addHeader("Content-type", "application/json");
String[] arrJSessionID = cookieHeader.get(1).split("=");
System.out.println("" + arrJSessionID[1]);
CookieStore cookieStore = new BasicCookieStore();
BasicClientCookie cookie = new BasicClientCookie("JSESSIONID=",
arrJSessionID[1]);
cookie.setDomain("http://localhost:8090");
cookie.setPath("/camunda-webapp-tomcat-standalone-7.2.0/");
// cookie.setAttribute(ClientCookie.DOMAIN_ATTR, "true");
cookieStore.addCookie(cookie);
// httpclient.setCookieStore(cookieStore);
HttpClient httpclient = HttpClientBuilder.create()
.setDefaultCookieStore(cookieStore).build();
String jsonString = new Gson().toJson("{}");
StringEntity jsonStr;
try {
jsonStr = new StringEntity(jsonString);
request.setEntity(jsonStr);
HttpResponse response = httpclient.execute(request);
int statusCode = response.getStatusLine().getStatusCode();
Header[] header = response.getHeaders("Set-Cookie");
for (Header h : header) {
System.out.println(h.getValue());
}
System.out.println("statusCode::" + statusCode);
} catch (Exception e) {
e.printStackTrace();
}
}