code: def meta(self, file_list, **kwargs):
          
          if not isinstance(file_list, list):
              file_list = [file_list]
          data = {'target': json.dumps(file_list)}
  
          return self._request('filemetas?blocks=0&dlink=1', 'filemetas', data=data, **kwargs)
docs: 获得文件(s)的metainfo
  
          :param file_list: 文件路径列表,如 ['/aaa.txt']
          :type file_list: list
  
          :return: requests.Response
              .. note ::
              示例
  
              * 文件不存在
  
              {"errno":12,"info":[{"errno":-9}],"request_id":3294861771}
  
              * 文件存在
              {
                  "errno": 0,
  
                  "info": [
  
                      {
  
                          "fs_id": 文件id,
  
                          "path": "\/\u5c0f\u7c73\/mi2s\u5237recovery.rar",
  
                          "server_filename": "mi2s\u5237recovery.rar",
  
                          "size": 8292134,
  
                          "server_mtime": 1391274570,
  
                          "server_ctime": 1391274570,
  
                          "local_mtime": 1391274570,
  
                          "local_ctime": 1391274570,
  
                          "isdir": 0,
  
                          "category": 6,
  
                          "path_md5": 279827390796736883,
  
                          "delete_fs_id": 0,
  
                          "object_key": "84221121-2193956150-1391274570512754",
  
                          "block_list": [
                              "76b469302a02b42fd0a548f1a50dd8ac"
                          ],
  
                          "md5": "76b469302a02b42fd0a548f1a50dd8ac",
  
                          "errno": 0
  
                      }
  
                  ],
  
                  "request_id": 2964868977
  
              }