Java:
Gửi một yêu cầu HTTP với xác thực cơ bản

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.Base64;

public class BasicAuthRequest {

    public static void main(String[] args) {
        try {
            URL url = new URL("http://example.com/resource");
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            
            String userCredentials = "user:password";
            String basicAuth = "Basic " + new String(Base64.getEncoder().encode(userCredentials.getBytes(StandardCharsets.UTF_8)));
            connection.setRequestProperty("Authorization", basicAuth);

            int responseCode = connection.getResponseCode();
            System.out.println("Mã Phản Hồi: " + responseCode);

            if (responseCode == HttpURLConnection.HTTP_OK) {
                BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
                String inputLine;
                StringBuilder response = new StringBuilder();

                while ((inputLine = in.readLine()) != null) {
                    response.append(inputLine);
                }
                in.close();

                System.out.println(response.toString());
            } else {
                System.out.println("Yêu cầu GET không thành công");
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}