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comparison piecrust/environment.py @ 336:aa6b7ff6a193

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internal: Use hashes for cache paths. This will prevent collisions (_e.g._ between `foo/bar` and `foo_bar`), and generating paths that are too long and exceed OS limits.
author Ludovic Chabant <ludovic@chabant.com>
date Fri, 03 Apr 2015 11:22:51 -0700
parents 1187739e5a19
children c2ca72fb7f0b
comparison
equal deleted inserted replaced
335:8511137d1b62 336:aa6b7ff6a193
1 import re 1 import re
2 import time 2 import time
3 import json 3 import json
4 import logging 4 import logging
5 import hashlib
5 import threading 6 import threading
6 import contextlib 7 import contextlib
7 import collections 8 import collections
8 import repoze.lru 9 import repoze.lru
9 10
13 14
14 re_fs_cache_key = re.compile(r'[^\d\w\-\._]+') 15 re_fs_cache_key = re.compile(r'[^\d\w\-\._]+')
15 16
16 17
17 def _make_fs_cache_key(key): 18 def _make_fs_cache_key(key):
18 return re_fs_cache_key.sub('_', key) 19 return hashlib.md5(key.encode('utf8')).hexdigest()
19 20
20 21
21 class MemCache(object): 22 class MemCache(object):
22 """ Simple memory cache. It can be backed by a simple file-system 23 """ Simple memory cache. It can be backed by a simple file-system
23 cache, but items need to be JSON-serializable to do this. 24 cache, but items need to be JSON-serializable to do this.