mirror of
https://github.com/l1ving/youtube-dl
synced 2024-12-22 00:15:35 +08:00
94 lines
2.9 KiB
Python
94 lines
2.9 KiB
Python
from __future__ import unicode_literals
|
|
|
|
import errno
|
|
import io
|
|
import json
|
|
import os
|
|
import re
|
|
import shutil
|
|
import traceback
|
|
|
|
from .compat import compat_expanduser, compat_getenv
|
|
from .utils import write_json_file
|
|
|
|
|
|
class Cache(object):
|
|
def __init__(self, ydl):
|
|
self._ydl = ydl
|
|
|
|
def _get_root_dir(self):
|
|
res = self._ydl.params.get('cachedir')
|
|
if res is None:
|
|
cache_root = compat_getenv('XDG_CACHE_HOME', '~/.cache')
|
|
res = os.path.join(cache_root, 'youtube-dl')
|
|
return compat_expanduser(res)
|
|
|
|
def _get_cache_fn(self, section, key, dtype):
|
|
assert re.match(r'^[a-zA-Z0-9_.-]+$', section), \
|
|
'invalid section %r' % section
|
|
assert re.match(r'^[a-zA-Z0-9_.-]+$', key), 'invalid key %r' % key
|
|
return os.path.join(
|
|
self._get_root_dir(), section, '%s.%s' % (key, dtype))
|
|
|
|
@property
|
|
def enabled(self):
|
|
return self._ydl.params.get('cachedir') is not False
|
|
|
|
def store(self, section, key, data, dtype='json'):
|
|
assert dtype in ('json',)
|
|
|
|
if not self.enabled:
|
|
return
|
|
|
|
fn = self._get_cache_fn(section, key, dtype)
|
|
try:
|
|
try:
|
|
os.makedirs(os.path.dirname(fn))
|
|
except OSError as ose:
|
|
if ose.errno != errno.EEXIST:
|
|
raise
|
|
write_json_file(data, fn)
|
|
except Exception:
|
|
tb = traceback.format_exc()
|
|
self._ydl.report_warning(
|
|
'Writing cache to %r failed: %s' % (fn, tb))
|
|
|
|
def load(self, section, key, dtype='json', default=None):
|
|
assert dtype in ('json',)
|
|
|
|
if not self.enabled:
|
|
return default
|
|
|
|
cache_fn = self._get_cache_fn(section, key, dtype)
|
|
try:
|
|
try:
|
|
with io.open(cache_fn, 'r', encoding='utf-8') as cachef:
|
|
return json.load(cachef)
|
|
except ValueError:
|
|
try:
|
|
file_size = os.path.getsize(cache_fn)
|
|
except (OSError, IOError) as oe:
|
|
file_size = str(oe)
|
|
self._ydl.report_warning(
|
|
'Cache retrieval from %s failed (%s)' % (cache_fn, file_size))
|
|
except IOError:
|
|
pass # No cache available
|
|
|
|
return default
|
|
|
|
def remove(self):
|
|
if not self.enabled:
|
|
self._ydl.to_screen('Cache is disabled (Did you combine --no-cache-dir and --rm-cache-dir?)')
|
|
return
|
|
|
|
cachedir = self._get_root_dir()
|
|
if not any((term in cachedir) for term in ('cache', 'tmp')):
|
|
raise Exception('Not removing directory %s - this does not look like a cache dir' % cachedir)
|
|
|
|
self._ydl.to_screen(
|
|
'Removing cache dir %s .' % cachedir, skip_eol=True)
|
|
if os.path.exists(cachedir):
|
|
self._ydl.to_screen('.', skip_eol=True)
|
|
shutil.rmtree(cachedir)
|
|
self._ydl.to_screen('.')
|