# -*- coding: utf-8 -*-
import os
import os.path as osp
import six
from icrawler.storage import BaseStorage
[docs]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
[docs] 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, six.string_types) else 'wb'
with open(filepath, mode) as fout:
fout.write(data)
[docs] def exists(self, id):
return osp.exists(osp.join(self.root_dir, id))
[docs] 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