authentication.py 文件源码

def authenticate_credentials(self, key):
        token_cache = 'token_' + key
        cache_user = cache.get(token_cache)
        if cache_user:
            return (cache_user, key)
        try:
            token = self.model.objects.get(key=key)
        except self.model.DoesNotExist:
            raise exceptions.AuthenticationFailed('User does not exist.')
        if not token.user.is_active:
            raise exceptions.PermissionDenied('The user is forbidden.')
        utc_now = timezone.now()
        if token.created < utc_now - timezone.timedelta(hours=24 * 30):
            raise exceptions.AuthenticationFailed('Token has been expired.')
        if token:
            token_cache = 'token_' + key
            cache.set(token_cache, token.user, 24 * 7 * 60 * 60)
        return (token.user, token)