科普
Json Web Token JWT三部分组成:
(1)Header
(2)Payload
(3)Signature
Header.Payload.Signature
Base64URL 算法:
Base64 有三个字符+、/和=,在 URL 里面有特殊含义,
所以要被替换掉:=被省略、+替换成-,/替换成_
代码实现
github:https://github.com/jpadilla/pyjwt/
文档:https://pyjwt.readthedocs.io/en/latest/index.html
安装
pip install PyJWT
复制jwt网站的数据进行加解密测试
代码示例
# -*- coding: utf-8 -*- import jwt data = { "sub": "1234567890", "name": "John Doe", "iat": 1516239022 } # 加密 py3加密后是字节型数据 encoded = jwt.encode(data, 'secret', algorithm='HS256') print(encoded.decode()) # eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9. # eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ. # DzMJlzRbt6kdh1Kbbqv8SA8QsddwfSoM1bqw41tQY2k print(jwt.decode(encoded, 'secret', algorithms=['HS256'])) # {'sub': '1234567890', 'name': 'John Doe', 'iat': 1516239022}
增加过期时间,Python3代码示例
# -*- coding: utf-8 -*- import time from datetime import datetime, timedelta import jwt class JwtUtil(object): def __init__(self, key): self.key = key def encode(self, payload, expires=7): """ 获取token :param payload: dict :param expires: 过期时间:天 :return: str """ # 使用utc时间 payload['exp'] = datetime.utcnow() + timedelta(days=expires) return jwt.encode(payload=payload, key=self.key).decode() def decode(self, token): """ 验证并解析token :param token: str :return: dict """ return jwt.decode(jwt=token, key=self.key)