authentication with Java and apache HttpClient 4.5.1

Question

my problem is, that i don't get, how to log in with Java and Apache HttpComponents (HttpClient v4.5.1) into a specific site: Site im trying to log in . I have the username (test_admin) and the password (testing) to log in but i think this is not enough and i need something more. I think this has something to do with the field security_token i see when i make a get request to the uri, but i dont know how to keep that or how to save that and what to do with it afterwards. There is also a hidden input field with the name login-ticket, but i dont know what's that for either. I want to login, because i need to see the courses and add some new ones. After trying with several code implementations im stick with this code:

    public static void setGet(CloseableHttpClient httpClient) throws UnsupportedOperationException, IOException
{
    HttpGet httpGet = new HttpGet("http://demo.studip.de/dispatch.php/admin/courses");
    CloseableHttpResponse httpResponse = httpClient.execute(httpGet);

    System.out.println("GET Response Status:: "
            + httpResponse.getStatusLine().getStatusCode());

    showEntity(httpResponse,httpResponse.getEntity());

}


public static HttpEntity setParam(int count, String[] params, String[] values)
{
    List<NameValuePair> formparams = new ArrayList<NameValuePair>();

    for (int i = 0; i < count; i++)
    {
        formparams.add(new BasicNameValuePair(params[i],values[i]));
        System.out.println("Paramater------------------> "+params[i]+"   Values-------------> "+values[i]);
    }   
    UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams, Consts.UTF_8);
    return entity;

}

public static void setPost(HttpClient httpC) throws ClientProtocolException, IOException
{
    HttpPost httppost = new HttpPost("http://demo.studip.de/dispatch.php/admin/courses");

    //String[] params = {"loginname", "password"};
    //String[] values = {"test_admin", "testing"};
    //HttpEntity entity = setParam(2, params, values );

    HttpResponse response = httpC.execute(httppost);
    System.out.println("POST Response Status:: "
            + response.getStatusLine().getStatusCode());
    showEntity(response, response.getEntity());

}


public static void showEntity(HttpResponse httpResp, HttpEntity httpClient) throws IOException
{

        httpClient = httpResp.getEntity();
        if (httpClient != null) 
            httpClient = new BufferedHttpEntity(httpClient);

         System.out.print(EntityUtils.toString(httpClient));
}




 public static void main(String[] args) throws InterruptedException, IOException {

     CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
     credentialsProvider.setCredentials(AuthScope.ANY, 
             new UsernamePasswordCredentials("test_admin", "testing"));
     CloseableHttpClient hc = 
     HttpClientBuilder.create().setDefaultCredentialsProvider(credentialsProvider).build();

     setGet(hc);
    // HttpClient httpclient = HttpClients.createDefault();
     setPost(hc);
     setGet(hc);

    }

The problem now ist that i get everytime the same answer from the server i only see the login page in the response, where the server asks me to login with username and password.

Answer 1

您从服务器401,403,301,302或200获得哪个代码？