# -*- coding: utf-8 -*-
import hashlib

# 待加密内容
# strdata = "xiaojingjiaaseafe16516506ng"
#
# h1 = hashlib.md5()
# h1.update(strdata.encode(encoding='utf-8'))
#
# strdata_tomd5 = h1.hexdigest()
#
# print("原始内容：", strdata, ",加密后：", strdata_tomd5)

import time
import base64

class base64Object:
    # 生产token
    def generate_token(key, expire=300):
        '''
            @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)
        token = ts_str + ':' + key
        b64_token = base64.urlsafe_b64encode(token.encode("utf-8"))
        return b64_token.decode("utf-8")


    # 解密token
    def get_certify_token(token):
        '''
            @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 '长度不对'
        known_sha1_tsstr = token_list[1]
        return known_sha1_tsstr

    # 验证token
    def certify_token(key, token):
        '''
            @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]
        print (float(ts_str))
        print (time.time())
        print (float(ts_str) < time.time())
        if float(ts_str) < time.time():
            # token expired
            return False

        known_sha1_tsstr = token_list[1]
        print (66666666666666)
        print (known_sha1_tsstr != key)
        if known_sha1_tsstr != key:
            # token certification failed
            return False
        # token certification success
        return True

    #
    # key = "xiaojingjing"
    # print("key：", key)
    # user_token = generate_token(key=key)
    #
    # print("加密后：", user_token)
    # user_de = certify_token(key=key, token=user_token)
    # print("验证结果：", user_de)
    #
    # key = "xiaoqingqing"
    # user_de = certify_token(key=key, token=user_token)
    # print("验证结果：",user_de)