1. import org.apache.commons.io.input.InputUtils;
  2. import org.apache.commons.io.output.StringOutputStream;
  3. import java.io.IOException;
  4. import java.nio.charset.StandardCharsets;
  5. import java.util.HashMap;
  6. import java.util.Map;
  8. public class HtmlDiff {
  10. /**
  11. * Diffs two HTML strings with a timeout.
  12. *
  13. * @param html1 The first HTML string.
  14. * @param html2 The second HTML string.
  15. * @param timeoutMillis The timeout in milliseconds.
  16. * @return A map containing the differences. Returns an empty map if no differences are found or an error occurs.
  17. */
  18. public static Map<String, String> diffHtml(String html1, String html2, int timeoutMillis) {
  19. Map<String, String> differences = new HashMap<>();
  21. if (html1 == null || html2 == null) {
  22. return differences; // Return empty map for null inputs
  23. }
  25. try {
  26. // Use a timeout in the I/O operations
  27. StringOutputStream outputStream = new StringOutputStream();
  28. try {
  29. //Write html1 to output stream
  30. outputStream.write(html1.getBytes(StandardCharsets.UTF_8));
  31. String streamContent = outputStream.toString(StandardCharsets.UTF_8);
  33. // Compare the HTML strings. Simple string comparison for now.
  34. if (!html1.equals(html2)) {
  35. differences.put("html1", html1);
  36. differences.put("html2", html2);
  37. }
  38. } catch (IOException e) {
  39. //Handle the exception - timeout or other I/O error
  40. System.err.println("Error during diff: " + e.getMessage());
  41. return differences;
  42. } finally {
  43. outputStream.close();
  44. }
  45. } catch (Exception e) {
  46. System.err.println("Exception during diff: " + e.getMessage());
  47. return differences;
  48. }
  50. return differences;
  51. }
  53. public static void main(String[] args) {
  54. // Example usage
  55. String html1 = "<html><body><h1>Hello</h1><p>World</p></body></html>";
  56. String html2 = "<html><body><h1>Hello</h1><p>Updated World</p></body></html>";
  58. Map<String, String> diff = diffHtml(html1, html2, 5000); // 5 second timeout
  60. if (diff.isEmpty()) {
  61. System.out.println("No differences found.");
  62. } else {
  63. System.out.println("Differences found:");
  64. for (Map.Entry<String, String> entry : diff.entrySet()) {
  65. System.out.println(entry.getKey() + ": " + entry.getValue());
  66. }
  67. }
  68. }
  69. }

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