1. import re
  3. def deduplicate_session_cookies(cookie_string):
  4. """
  5. Deduplicates session cookies from a string.
  7. Args:
  8. cookie_string: A string containing semicolon-separated cookies.
  10. Returns:
  11. A list of unique session cookies.
  12. """
  14. if not cookie_string:
  15. return []
  17. cookies = cookie_string.split(';') # Split the cookie string into individual cookies
  18. session_cookies = []
  19. seen = set() # Use a set to track seen cookies for efficient uniqueness check
  21. for cookie in cookies:
  22. cookie = cookie.strip() # Remove leading/trailing whitespace
  23. if not cookie: # Skip empty cookies
  24. continue
  26. # Extract the cookie name and value
  27. match = re.match(r'^([^=]+)=([^;]+)$', cookie)
  28. if match:
  29. name = match.group(1).strip()
  30. value = match.group(2).strip()
  32. # Check if the cookie is a session cookie (e.g., contains "session" or "PHPSESSID")
  33. if 'session' in name.lower() or 'phpsessid' in name.lower():
  34. #Convert cookie to tuple (name, value) for hashability
  35. cookie_tuple = (name, value)
  36. if cookie_tuple not in seen:
  37. session_cookies.append(cookie)
  38. seen.add(cookie_tuple)
  39. return session_cookies
  41. if __name__ == '__main__':
  42. # Example usage
  43. cookie_data = "sessionid=12345; othercookie=abc; sessionid=12345; anothercookie=xyz; PHPSESSID=abcdefg; sessionid=67890;"
  44. deduplicated_cookies = deduplicate_session_cookies(cookie_data)
  45. print(deduplicated_cookies)

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