自定制auth认证类-jwt

from rest_framework_jwt.authentication import BaseAuthentication,BaseJSONWebTokenAuthentication
from rest_framework.exceptions import AuthenticationFailed
from rest_framework_jwt.authentication import jwt_decode_handler
from rest_framework_jwt.authentication import get_authorization_header,jwt_get_username_from_payload
from rest_framework import exceptions
class MyToken(BaseJSONWebTokenAuthentication):
    def authenticate(self, request):
        jwt_value=str(request.META.get('HTTP_AUTHORIZATION'))
        # 认证
        try:
            payload = jwt_decode_handler(jwt_value)

        except Exception:
            raise exceptions.AuthenticationFailed("认证失败")
        user=self.authenticate_credentials(payload)
        return user,None
    
#局部使用，全局使用
```