/usr/share/pyshared/allmydata/util/cachedir.py is in tahoe-lafs 1.9.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | import os.path, stat, weakref, time
from twisted.application import service, internet
from allmydata.util import fileutil
HOUR = 60*60
class CacheDirectoryManager(service.MultiService):
def __init__(self, basedir, pollinterval=1*HOUR, old=1*HOUR):
service.MultiService.__init__(self)
self.basedir = basedir
fileutil.make_dirs(basedir)
self.old = old
self.files = weakref.WeakValueDictionary()
t = internet.TimerService(pollinterval, self.check)
t.setServiceParent(self)
def get_file(self, key):
assert isinstance(key, str) # used as filename
absfn = os.path.join(self.basedir, key)
if os.path.exists(absfn):
os.utime(absfn, None)
cf = CacheFile(absfn)
self.files[key] = cf
return cf
def check(self):
now = time.time()
for fn in os.listdir(self.basedir):
if fn in self.files:
continue
absfn = os.path.join(self.basedir, fn)
mtime = os.stat(absfn)[stat.ST_MTIME]
if now - mtime > self.old:
os.remove(absfn)
class CacheFile:
def __init__(self, absfn):
self.filename = absfn
def get_filename(self):
return self.filename
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