需求
设置有效期,但有效期不宜过长,需要刷新。
如何解决刷新问题?
- 手机号+验证码(或帐号+密码)验证后颁发接口调用token与refresh_token(刷新token)
- Token 有效期为2小时,在调用接口时携带,每2小时刷新一次
- 提供refresh_token,refresh_token 有效期14天
- 在接口调用token过期后凭借refresh_token 获取新token
- 未携带token 、错误的token或接口调用token过期,返回401状态码
- refresh_token 过期返回403状态码,前端在使用refresh_token请求新token时遇到403状态码则进入用户登录界面从新认证。
- token的携带方式是在请求头中使用如下格式:
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzb21lIjoicGF5bG9hZCJ9.4twFt5NiznN84AWoo1d7KO1T_yoc0Z6XOpOVswacPZg
注意:Bearer前缀与token中间有一个空格
实现
注册或登录获取token
toutiao/resources/user/passport.pty
class AuthorizationResource(Resource):
"""
认证
"""
def _generate_tokens(self, user_id, with_refresh_token=True):
"""
生成token 和refresh_token
:param user_id: 用户id
:return: token, refresh_token
"""
# 颁发JWT
now = datetime.utcnow()
expiry = now + timedelta(hours=current_app.config['JWT_EXPIRY_HOURS'])
token = generate_jwt({'user_id': user_id, 'refresh': False}, expiry)
refresh_token = None
if with_refresh_token:
refresh_expiry = now + timedelta(days=current_app.config['JWT_REFRESH_DAYS'])
refresh_token = generate_jwt({'user_id': user_id, 'refresh': True}, refresh_expiry)
return token, refresh_token
def post(self):
"""
登录创建token
"""
json_parser = RequestParser()
json_parser.add_argument('mobile', type=parser.mobile, required=True, location='json')
json_parser.add_argument('code', type=parser.regex(r'^\d{6}$'), required=True, location='json')
args = json_parser.parse_args()
mobile = args.mobile
code = args.code
# 从redis中获取验证码
key = 'app:code:{}'.format(mobile)
try:
real_code = current_app.redis_master.get(key)
except ConnectionError as e:
current_app.logger.error(e)
real_code = current_app.redis_slave.get(key)
try:
current_app.redis_master.delete(key)
except ConnectionError as e:
current_app.logger.error(e)
if not real_code or real_code.decode() != code:
return {'message': 'Invalid code.'}, 400
# 查询或保存用户
user = User.query.filter_by(mobile=mobile).first()
if user is None:
# 用户不存在,注册用户
user_id = current_app.id_worker.get_id()
user = User(id=user_id, mobile=mobile, name=mobile, last_login=datetime.now())
db.session.add(user)
profile = UserProfile(id=user.id)
db.session.add(profile)
db.session.commit()
else:
if user.status == User.STATUS.DISABLE:
return {'message': 'Invalid user.'}, 403
token, refresh_token = self._generate_tokens(user.id)
return {'token': token, 'refresh_token': refresh_token}, 201
请求钩子
common/utils/middlewares.py
from flask import request, g
from .jwt_util import verify_jwt
def jwt_authentication():
"""
根据jwt验证用户身份
"""
g.user_id = None
g.is_refresh_token = False
authorization = request.headers.get('Authorization')
if authorization and authorization.startswith('Bearer '):
token = authorization.strip()[7:]
payload = verify_jwt(token)
if payload:
g.user_id = payload.get('user_id')
g.is_refresh_token = payload.get('refresh')
强制登录装饰器
common/utils/decorators.py
def login_required(func):
"""
用户必须登录装饰器
使用方法:放在method_decorators中
"""
@wraps(func)
def wrapper(*args, **kwargs):
if not g.user_id:
return {'message': 'User must be authorized.'}, 401
elif g.is_refresh_token:
return {'message': 'Do not use refresh token.'}, 403
else:
return func(*args, **kwargs)
return wrapper
更新token接口
toutiao/resources/user/passport.py
class AuthorizationResource(Resource):
"""
认证
"""
...
# 补充put方式 更新token接口
def put(self):
"""
刷新token
"""
user_id = g.user_id
if user_id and g.is_refresh_token:
token, refresh_token = self._generate_tokens(user_id, with_refresh_token=False)
return {'token': token}, 201
else:
return {'message': 'Wrong refresh token.'}, 403