backends.py 文件源码

def authenticate(self, request):
        auth = authentication.get_authorization_header(request).split()

        if not auth or auth[0].lower() != b'token':
            return None

        if len(auth) == 1:
            msg = _('Invalid token header. No credentials provided.')
            raise exceptions.AuthenticationFailed(msg)
        elif len(auth) > 2:
            msg = _('Invalid token header. Token string should not contain spaces.')
            raise exceptions.AuthenticationFailed(msg)

        try:
            token = auth[1].decode()
        except UnicodeError:
            msg = _('Invalid token header. Token string should not contain invalid characters.')
            raise exceptions.AuthenticationFailed(msg)

        return self.authenticate_credentials(token)