import time
import base64
import hmac

def generate_token(key, expire=3600):
r'''
@Args:
key: str (用户给定的key，需要用户保存以便之后验证token,每次产生token时的key 都可以是同一个key)
expire: int(最大有效时间，单位为s)
@Return:
state: str
'''
ts_str = str(time.time() + expire)
ts_byte = ts_str.encode("utf-8")
sha1_tshexstr = hmac.new(key.encode("utf-8"), ts_byte, 'sha1').hexdigest()
token = ts_str + ':' + sha1_tshexstr
b64_token = base64.urlsafe_b64encode(token.encode("utf-8"))
return b64_token.decode("utf-8")
def certify_token(key, token):
r'''
@Args:
key: str
token: str
@Returns:
boolean
'''
token_str = base64.urlsafe_b64decode(token).decode('utf-8')
token_list = token_str.split(':')
if len(token_list) != 2:
return False
ts_str = token_list[0]
if float(ts_str) < time.time():
# token expired
return False
known_sha1_tsstr = token_list[1]
sha1 = hmac.new(key.encode("utf-8"),ts_str.encode('utf-8'),'sha1')
calc_sha1_tsstr = sha1.hexdigest()
if calc_sha1_tsstr != known_sha1_tsstr:
# token certification failed
return False
# token certification success
return True

key = "JD98Dskw=23njQndW9D"

一小时后过期

token = generate_token(key, 3600)

print(certify_token(key, token))