1. import java.io.*;
  2. import java.net.HttpURLConnection;
  3. import java.util.HashMap;
  4. import java.util.Map;
  5. import java.util.concurrent.ConcurrentHashMap;
  7. public class JsonBackup {
  9. private static final int MAX_REQUESTS_PER_MINUTE = 10; // Rate limit
  10. private static final ConcurrentHashMap<String, Long> requestTimestamps = new ConcurrentHashMap<>(); // Track request timestamps
  12. public static void backupJson(String url, String filenamePrefix) {
  13. try {
  14. // Rate limiting check
  15. long currentTime = System.currentTimeMillis();
  16. if (isRateLimited()) {
  17. System.out.println("Rate limit exceeded. Skipping " + url);
  18. return;
  19. }
  21. HttpURLConnection connection = getURLConnection(url);
  22. if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
  23. String jsonResponse = readResponse(connection);
  24. saveJsonToFile(jsonResponse, filenamePrefix);
  25. System.out.println("Backed up " + url + " to " + filenamePrefix + ".json");
  26. } else {
  27. System.out.println("Error backing up " + url + ". Status code: " + connection.getResponseCode());
  28. }
  29. connection.disconnect();
  31. } catch (IOException e) {
  32. System.err.println("Error backing up " + url + ": " + e.getMessage());
  33. }
  34. }
  36. private static HttpURLConnection getURLConnection(String url) throws IOException {
  37. return new HttpURLConnection(url).openConnection();
  38. }
  40. private static String readResponse(HttpURLConnection connection) throws IOException {
  41. try (InputStream inputStream = connection.getInputStream();
  42. BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream))) {
  44. StringBuilder sb = new StringBuilder();
  45. String line;
  46. while ((line = reader.readLine()) != null) {
  47. sb.append(line);
  48. }
  49. return sb.toString();
  50. }
  51. }
  53. private static void saveJsonToFile(String jsonResponse, String filenamePrefix) throws IOException {
  54. String filename = filenamePrefix + System.currentTimeMillis() + ".json"; //Unique filename
  55. try (FileWriter writer = new FileWriter(filename)) {
  56. writer.write(jsonResponse);
  57. }
  58. }
  60. private static boolean isRateLimited() {
  61. long now = System.currentTimeMillis();
  62. requestTimestamps.removeIf(timestamp -> timestamp < now - 60000); // Remove requests older than 1 minute (60000ms)
  63. int count = requestTimestamps.size();
  64. if (count >= MAX_REQUESTS_PER_MINUTE) {
  65. return true;
  66. }
  67. requestTimestamps.put(now, now + 60000); // Store timestamp for the next minute
  68. return false;
  69. }
  71. public static void main(String[] args) {
  72. // Example Usage
  73. String url1 = "https://rickandmortyapi.com/api/character";
  74. String url2 = "https://jsonplaceholder.typicode.com/todos/1";
  75. String filenamePrefix = "backup_";
  77. backupJson(url1, filenamePrefix);
  78. backupJson(url2, filenamePrefix);
  79. }
  80. }

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