code: public GetMediaInfoOfFileResponse getMediaInfoOfFile(String bucket, String key) {
          GetMediaInfoOfFileRequest request = new GetMediaInfoOfFileRequest();
          request.setBucket(bucket);
          request.setKey(key);
          return getMediaInfoOfFile(request);
      }
docs: Retrieve the media information of an object in Bos bucket.
  
  @param bucket  The bucket name of Bos object which you want to read.
  @param key     The key name of Bos object which your want to read.
  
  @return The media information of an object in Bos bucket.