django中token的签发

1.下载JWT

pip install djangorestframework-jwt

2.签发token

#导入jwt
from rest_framework_jwt.serializers import jwt_payload_handler
from rest_framework_jwt.serializers import jwt_encode_handler
#导入jwt默认的登录模块
from django.contrib import auth

class LoginAPIView(APIView):

    def post(self, request, *args, **kwargs):
        username = request.data.get('username')
        password = request.data.get('password')

        if not (username and password):
            return Response({
                'error': 'username与password为必须字段'
            })
        user_obj = auth.authenticate(username=username, is_active=True, password=password)
        if user_obj:
            # 签发token
            payload = jwt_payload_handler(user_obj)
            token = jwt_encode_handler(payload)
            return Response({
                'status': 0,
                'msg': 'ok',
                'token': token
            })
        else:
            return Response({
                'status': 1,
                'msg': 'username与password有误'
            })

3.全局配置jwt和局部配置

# 全局认证组件
 REST_FRAMEWORK={
     'DEFAULT_AUTHENTICATION_CLASSES':[
         'app01.cache_jwt.JwtToken',
    ]
 }
#设置token过期时间
import datetime
JWT_AUTH = {
    # 过期时间
    'JWT_EXPIRATION_DELTA': datetime.timedelta(seconds=300),
}

#局部使用jwt
authentication_classes = [JwtToken]
#局部禁用jwt
authentication_classes = []

4.jwt的验证

from rest_framework_jwt.authentication import BaseJSONWebTokenAuthentication
from rest_framework_jwt.authentication import jwt_decode_handler
from rest_framework import exceptions

class JwtToken(BaseJSONWebTokenAuthentication):
    def authenticate(self, request):

        jwt_value = request.META.get('HTTP_TOKEN')
        if not jwt_value:
            raise exceptions.AuthenticationFailed('token 字段是必须的')
        try:
            payload = jwt_decode_handler(jwt_value)
        except jwt.ExpiredSignature:
            raise exceptions.AuthenticationFailed('token已过期')
        except jwt.InvalidTokenError:
            raise exceptions.AuthenticationFailed('token非法')

        user = self.authenticate_credentials(payload)

        return (user, jwt_value)

 注释:严格的token验证是要在签发的时候存进数据库或者缓存中,然后在前端向后端发送数据的时候从数据库中或者缓存中取出来进行校验