33 lines
1012 B
Python
33 lines
1012 B
Python
import random
|
||
import time
|
||
|
||
|
||
class ULID:
|
||
def __init__(self):
|
||
# 定义字符集，使用Crockford's Base32字符集
|
||
self.encoding = "0123456789ABCDEFGHJKMNPQRSTVWXYZ"
|
||
|
||
def generate(self) -> str:
|
||
# 获取当前时间戳（毫秒）
|
||
timestamp = int(time.time() * 1000)
|
||
|
||
# 生成随机数部分
|
||
randomness = random.getrandbits(80) # 80位随机数
|
||
|
||
# 转换时间戳为base32字符串（10个字符）
|
||
time_chars = []
|
||
for _ in range(10):
|
||
timestamp, mod = divmod(timestamp, 32)
|
||
time_chars.append(self.encoding[mod])
|
||
time_chars.reverse()
|
||
|
||
# 转换随机数为base32字符串（16个字符）
|
||
random_chars = []
|
||
for _ in range(16):
|
||
randomness, mod = divmod(randomness, 32)
|
||
random_chars.append(self.encoding[mod])
|
||
random_chars.reverse()
|
||
|
||
# 组合最终结果
|
||
return ''.join(time_chars + random_chars)
|