1. from urllib.parse import urlparse, parse_qs
  3. def aggregate_query_strings(url):
  4. """
  5. Aggregates values of query strings from a URL with basic input validation.
  7. Args:
  8. url (str): The URL to parse.
  10. Returns:
  11. dict: A dictionary where keys are query string parameters and values are lists of their corresponding values.
  12. Returns an empty dictionary if the URL is invalid or has no query parameters.
  13. """
  14. try:
  15. parsed_url = urlparse(url)
  16. query_params = parse_qs(parsed_url.query)
  18. # Basic validation: Check if query_params is not None
  19. if query_params is None:
  20. return {}
  22. # Iterate through the parsed query parameters and aggregate values
  23. aggregated_params = {}
  24. for key, values in query_params.items():
  25. if not isinstance(key, str):
  26. print(f"Warning: Invalid key type found: {key}. Skipping.")
  27. continue # Skip if key is not a string
  29. if not values: # Skip empty values
  30. continue
  32. if isinstance(values, list):
  33. aggregated_params[key] = values
  34. else:
  35. print(f"Warning: Unexpected value type for key '{key}'. Skipping.")
  36. continue
  38. return aggregated_params
  39. except Exception as e:
  40. print(f"Error parsing URL: {e}")
  41. return {}
  43. if __name__ == '__main__':
  44. # Example usage
  45. url1 = "https://example.com?param1=value1&param2=value2&param1=value3"
  46. url2 = "https://example.com?param1=value1&param2"
  47. url3 = "https://example.com"
  48. url4 = "invalid_url"
  49. url5 = "https://example.com?param1=value1&param2=value2&param3=value1"
  50. url6 = "https://example.com?param1=value1&param2=value2&param3=value1&param4=value1"
  52. print(f"URL: {url1}, Aggregated: {aggregate_query_strings(url1)}")
  53. print(f"URL: {url2}, Aggregated: {aggregate_query_strings(url2)}")
  54. print(f"URL: {url3}, Aggregated: {aggregate_query_strings(url3)}")
  55. print(f"URL: {url4}, Aggregated: {aggregate_query_strings(url4)}")
  56. print(f"URL: {url5}, Aggregated: {aggregate_query_strings(url5)}")
  57. print(f"URL: {url6}, Aggregated: {aggregate_query_strings(url6)}")

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