python获取及验证token python token验证

1:token验证码:

import time
import base64
import hmac


def get_token(key, expire=3600):
    '''
    :param 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)
    :param expire: int(最大有效时间，单位为s)
    :return: token
    '''
    s = time.time()
    ts_str = str(int(s) + 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 out_token(key, token):
    '''
    :param key: 服务器给的固定key
    :param token: 前端传过来的token
    :return: true,false
    '''

    # token是前端传过来的token字符串
    try:
        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
    except Exception as e:
        print(e)


if __name__ == '__main__':

    token = get_token('wang')
    print(token)
    str = out_token('wang', token)
    print(str)