记一次文件上传遇到的坑(文件名|文件格式乱码)

    def post(self, *args, **kwargs):        box = self.get_argument('box', None)        size = int(self.request.headers.get('Content-Length'))        if size / 1000.0 > 2000:            self.set_status(400)            self.write({'msg': self._("上传图片不能大于2M.")})            return        file_info = self.request.files['file'][0]        file_name = generate_file_name(file_info['filename'])        if not file_name:            self.write_rows(code=-1, msg=self._('Invalid file name'))            return        year_month, day = time.strftime("%Y%m"), time.strftime("%d")        path = os.path.join(FILE_UPLOAD_PATH, year_month, day)        # 大图        absolute_path = os.path.join(path, file_name)        app_path = absolute_path[absolute_path.rindex('upload'):]        # 缩略图        crop_absolute_path = os.path.join(path, 'crop'+file_name)        crop_app_path = crop_absolute_path[crop_absolute_path.rindex('upload'):]        self.create_dir(path)        try:            with open(absolute_path, 'wb') as f:                f.write(file_info['body'])                if box:                    from utils import crop_image                    crop_image(crop_absolute_path, box)                self.write(json_encode({                    'path': app_path,                    'crop_path': crop_app_path                }))        except Exception as e:            app_log.error(e)            raise HTTPError(500)

    async def post(self, *args, **kwargs):        """文件上传"""        uid = self.current_user['_id']        sign = self.cal_signature(uid=uid, body=None)        files = self.request.files['files'][0]        res = worker.file_upload(uid=uid, sign=sign, files={'file': (files.filename, files.body, files.content_type)})        return await self.render_json(rows=json.loads(res))