1. import java.io.File;
  2. import java.io.IOException;
  3. import java.nio.file.Files;
  4. import java.nio.file.Path;
  5. import java.nio.file.Paths;
  6. import java.util.regex.Matcher;
  7. import java.util.regex.Pattern;
  9. public class HtmlIntegrityChecker {
  11. private static final String MIN_HTML_VERSION = "<html>"; // Basic HTML tag for older versions
  12. private static final String MIN_HTML_VERSION_WITH_HEAD = "<html"; // HTML tag with head for slightly later versions
  13. private static final String MIN_HTML_VERSION_WITH_HEAD_AND_BODY = "<html body>"; // HTML tag with head and body for some older versions
  17. public static boolean verifyHtmlIntegrity(String filePath) throws IOException {
  18. // Check if the file exists
  19. Path path = Paths.get(filePath);
  20. if (!Files.exists(path)) {
  21. System.err.println("File not found: " + filePath);
  22. return false;
  23. }
  25. String htmlContent = new String(Files.readAllBytes(path));
  27. //Check for minimal HTML structure
  28. if (!htmlContent.contains(MIN_HTML_VERSION) && !htmlContent.contains(MIN_HTML_VERSION_WITH_HEAD) && !htmlContent.contains(MIN_HTML_VERSION_WITH_HEAD_AND_BODY)) {
  29. System.err.println("HTML file appears to be invalid or too minimal.");
  30. return false;
  31. }
  33. //Basic validation - Check for required tags
  34. if (!htmlContent.contains("<head>") || !htmlContent.contains("<body>")) {
  35. System.err.println("HTML file missing required head or body tags.");
  36. return false;
  37. }
  39. return true;
  40. }
  42. public static void main(String[] args) {
  43. // Example usage:
  44. if (args.length != 1) {
  45. System.out.println("Usage: java HtmlIntegrityChecker <html_file_path>");
  46. return;
  47. }
  49. String filePath = args[0];
  50. try {
  51. boolean isValid = verifyHtmlIntegrity(filePath);
  52. if (isValid) {
  53. System.out.println("HTML file is valid.");
  54. } else {
  55. System.out.println("HTML file is invalid.");
  56. }
  57. } catch (IOException e) {
  58. System.err.println("Error reading file: " + e.getMessage());
  59. }
  60. }
  61. }

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