| import os | |
| import os.path as osp | |
| import six | |
| from .base import BaseStorage | |
| class FileSystem(BaseStorage): | |
| """Use filesystem as storage backend. | |
| The id is filename and data is stored as text files or binary files. | |
| """ | |
| def __init__(self, root_dir): | |
| self.root_dir = root_dir | |
| def write(self, id, data): | |
| filepath = osp.join(self.root_dir, id) | |
| folder = osp.dirname(filepath) | |
| if not osp.isdir(folder): | |
| try: | |
| os.makedirs(folder) | |
| except OSError: | |
| pass | |
| mode = "w" if isinstance(data, str) else "wb" | |
| with open(filepath, mode) as fout: | |
| fout.write(data) | |
| def exists(self, id): | |
| return osp.exists(osp.join(self.root_dir, id)) | |
| def max_file_idx(self): | |
| max_idx = 0 | |
| for filename in os.listdir(self.root_dir): | |
| try: | |
| idx = int(osp.splitext(filename)[0]) | |
| except ValueError: | |
| continue | |
| if idx > max_idx: | |
| max_idx = idx | |
| return max_idx | |