1. import java.io.IOException;
  2. import java.net.MalformedURLException;
  3. import java.net.URL;
  4. import java.net.URLConnection;
  5. import java.util.HashMap;
  6. import java.util.Map;
  7. import java.util.logging.Logger;
  9. public class HeaderImporter {
  11. private static final Logger logger = Logger.getLogger(HeaderImporter.class.getName());
  13. public static void main(String[] args) {
  14. String url = "https://www.example.com"; // Replace with the URL you want to fetch headers from
  15. try {
  16. Map<String, String> headers = fetchResponseHeaders(url);
  17. if (headers != null) {
  18. logger.info("Successfully fetched headers for: " + url);
  19. for (Map.Entry<String, String> entry : headers.entrySet()) {
  20. logger.info("Header: " + entry.getKey() + ", Value: " + entry.getValue());
  21. }
  22. } else {
  23. logger.severe("Failed to fetch headers for: " + url);
  24. }
  25. } catch (Exception e) {
  26. logger.severe("An error occurred: " + e.getMessage());
  27. e.printStackTrace();
  28. }
  29. }
  31. public static Map<String, String> fetchResponseHeaders(String urlString) {
  32. try {
  33. URL url = new URL(urlString);
  34. URLConnection connection = url.openConnection();
  36. // Get the header fields
  37. Map<String, String> headers = new HashMap<>();
  38. for (String header : connection.getHeaderFields().keySet()) {
  39. headers.put(header, connection.getHeaderFields().get(header));
  40. }
  41. return headers;
  43. } catch (MalformedURLException e) {
  44. logger.severe("Malformed URL: " + e.getMessage());
  45. return null;
  46. } catch (IOException e) {
  47. logger.severe("IOException: " + e.getMessage());
  48. return null;
  49. }
  50. }
  51. }

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