Аутентификация на форуме phpBB

      package com.company;
        import java.net.Authenticator;
        import java.net.PasswordAuthentication;
 
public class Main extends Authenticator {
    private String host;
    private String username;
    private String password;
 
    public Main(String host, String username, String password) {
        super();
        this.host = "http://sysadmins.ru";
        this.username = "Megatron666";
        this.password = "123456";
    }
 
    protected PasswordAuthentication getPasswordAuthentication() {
        if(host.equals(getRequestingHost())) {
            return new PasswordAuthentication(username, password.toCharArray());
        } else {
            return super.getPasswordAuthentication();
        }
    }
}

package com.company;
        import java.io.BufferedReader;
        import java.io.IOException;
        import java.io.InputStreamReader;
        import java.net.Authenticator;
        import java.net.InetAddress;
        import java.net.MalformedURLException;
        import java.net.PasswordAuthentication;
        import java.net.URL;
 
public class Main {
 
    public static void main(String[] args) {
 
        try {
 
            // Sets the authenticator that will be used by the networking code
            // when a proxy or an HTTP server asks for authentication.
            Authenticator.setDefault(new CustomAuthenticator());
 
            URL url = new URL("http://sysadmins.ru/login.php");
 
            // read text returned by server
            BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
 
            String line;
            while ((line = in.readLine()) != null) {
                System.out.println(line);
            }
            in.close();
 
        }
        catch (MalformedURLException e) {
            System.out.println("Malformed URL: " + e.getMessage());
        }
        catch (IOException e) {
            System.out.println("I/O Error: " + e.getMessage());
        }
 
    }
 
    public static class CustomAuthenticator extends Authenticator {
 
        // Called when password authorization is needed
        protected PasswordAuthentication getPasswordAuthentication() {
 
            // Get information about the request
            String prompt = getRequestingPrompt();
            String hostname = getRequestingHost();
            InetAddress ipaddr = getRequestingSite();
            int port = getRequestingPort();
 
            String username = "Megatron666";
            String password = "123456";
 
            // Return the information (a data holder that is used by Authenticator)
            return new PasswordAuthentication(username, password.toCharArray());
 
        }
 
    }
 
}

package com.company;
 
import javax.net.ssl.HttpsURLConnection;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
 
public class Main {
 
    private final String USER_AGENT = "Mozilla/5.0";
 
    public static void main(String[] args) throws Exception {
 
        Main http = new Main();
 
        System.out.println("Testing 1 - Send Http GET request");
        http.sendGet();
 
        System.out.println("\nTesting 2 - Send Http POST request");
        http.sendPost();
 
    }
 
    // HTTP GET request
    private void sendGet() throws Exception {
 
        String url = "http://sysadmins.ru/login.php";
 
        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();
 
        // optional default is GET
        con.setRequestMethod("GET");
 
        //add request header
        con.setRequestProperty("User-Agent", USER_AGENT);
 
        int responseCode = con.getResponseCode();
        System.out.println("\nSending 'GET' request to URL : " + url);
        System.out.println("Response Code : " + responseCode);
 
        BufferedReader in = new BufferedReader(
                new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();
 
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();
 
        //print result
        System.out.println(response.toString());
 
    }
 
    // HTTP POST request
    private void sendPost() throws Exception {
 
        String url = "http://sysadmins.ru/login.php";
        URL obj = new URL(url);
        HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();
 
        //add reuqest header
        con.setRequestMethod("POST");
        con.setRequestProperty("User-Agent", USER_AGENT);
        con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
 
        String urlParameters = "username=Megatron666&password=123456&redirect=&login=%C2%F5%EE%E4";
 
        // Send post request
        con.setDoOutput(true);
        DataOutputStream wr = new DataOutputStream(con.getOutputStream());
        wr.writeBytes(urlParameters);
        wr.flush();
        wr.close();
 
        int responseCode = con.getResponseCode();
        System.out.println("\nSending 'POST' request to URL : " + url);
        System.out.println("Post parameters : " + urlParameters);
        System.out.println("Response Code : " + responseCode);
 
        BufferedReader in = new BufferedReader(
                new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();
 
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();
 
        //print result
        System.out.println(response.toString());
 
    }
 
}

import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.CookieStore;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.cookie.Cookie;
import org.apache.http.impl.client.BasicCookieStore;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
 
/**
 * Created by Igor Simagin on 13.05.2016.
 */
public class Authorization {
 
 
    private static final String SCHEME = "http";
    private static final String HOST = "sysadmins.ru";
    private static final String PATH = "/login.php";
    private static final String USERNAME = "Megatron666";
    private static final String PASSWORD = "123456";
    private static final String LOGIN = "%C2%F5%EE%E4";
 
 
    public static void main(String[] args) throws IOException, URISyntaxException {
 
 
        CookieStore cookieStore = new BasicCookieStore();
        String sid = null;
 
 
        try (CloseableHttpClient httpClient = HttpClientBuilder.create().setDefaultCookieStore(cookieStore).build()) {
 
            URI uri = new URIBuilder()
                    .setScheme(SCHEME)
                    .setHost(HOST)
                    .setPath(PATH)
                    .build();
 
 
            HttpPost httpPost = new HttpPost(uri);
 
            List<NameValuePair> nvps = new ArrayList<>();
            nvps.add(new BasicNameValuePair("username", USERNAME));
            nvps.add(new BasicNameValuePair("password", PASSWORD));
            nvps.add(new BasicNameValuePair("login", LOGIN));
            httpPost.setEntity(new UrlEncodedFormEntity(nvps));
 
            try (CloseableHttpResponse response = httpClient.execute(httpPost)) {
                HttpEntity entity = response.getEntity();
                EntityUtils.consume(entity);
            }
        }
 
        List<Cookie> cookies = cookieStore.getCookies();
        for (Cookie cookie : cookies) {
            if (cookie.getName().equals("sysadminsnew_sid")) {
                sid = cookie.getValue();
                break;
            }
        }
 
        try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
            URI uri = new URIBuilder()
                    .setScheme(SCHEME)
                    .setHost(HOST)
                    .setPath(PATH)
                    .setParameter("sid", sid).build();
            System.out.println(uri);
            HttpGet httpGet = new HttpGet(uri);
 
            try (CloseableHttpResponse response = httpClient.execute(httpGet)) {
 
                try (BufferedReader br = new BufferedReader(
                        new InputStreamReader((response.getEntity().getContent()), "windows-1251"))) {
                    String output;
                    while ((output = br.readLine()) != null) {
                        System.out.println(output);
                    }
                }
            }
        }
    }
 
}

try (CloseableHttpClient httpClient = HttpClients.createDefault()){
}

CloseableHttpClient httpClient = HttpClients.createDefault()
try {
//code
}finally{
    httpClient.close();
}