import time import sha import random import binascii import string def _stringify_sha(sha_hash): """Convert binary sha1 hash data into printable characters.""" print_sha = "" for char in sha_hash: print_sha = print_sha + binascii.b2a_hex(char) return print_sha def _sha_data(data): """sha1 hash some bytes.""" sha_hash = sha.new() sha_hash.update(data) return sha_hash.digest() def unique_id(data = ''): data_string = "%s%s%s" % (time.time(), random.randint(10000, 100000), data) return _stringify_sha(_sha_data(data_string)) ACTIVITY_UID_LEN = 40 def is_hex(s): return s.strip(string.hexdigits) == '' def validate_activity_uid(uid): """Validate an activity UID.""" if type(uid) != type("") and type(uid) != type(u""): return False if len(uid) != ACTIVITY_UID_LEN: return False if not is_hex(uid): return False return True