failed to_json_str FileBox with stream Type

[alingse]

stream 模式的 FileBox 无法发送

@dataclass
class FileBoxOptionsStream(FileBoxOptionsBase):
    """
    stream file-box options
    """
    # TODO -> recheck the stream data type
    stream: bytes = b''
    type: FileBoxType = FileBoxType.Stream

而对应的

class FileBoxEncoder(json.JSONEncoder):
    def default(self, obj):
        if isinstance(obj, bytes):
            return str(obj, encoding='utf-8')

        return json.JSONEncoder.default(self, obj)

因为 stream 是二进制的，且不是 utf8 格式，所以这里转换会失败

ERROR:root:'utf-8' codec can't decode byte 0x89 in position 0: invalid start byte

所以我觉得 FileBoxEncoder 可以再改改。

我可以来提供 PR

[wj-Mcat]

Thanks for your attention on sending file with stream mode, I think you can keep eyes on this issue: wechaty/python-wechaty-puppet-service#64 (comment)

There are some changes on sending & recieving file in next few weeks, so we should wait for @huan new feature about sending file. If you have interest in this problem, you can post a pr when the new feature is done.

Thanks a lot your concern about this problem.