mirror of
https://github.com/yt-dlp/yt-dlp.git
synced 2024-11-23 02:25:11 +00:00
97 lines
3.4 KiB
Python
97 lines
3.4 KiB
Python
import contextlib
|
|
import errno
|
|
import json
|
|
import os
|
|
import re
|
|
import shutil
|
|
import traceback
|
|
|
|
from .utils import expand_path, traverse_obj, version_tuple, write_json_file
|
|
from .version import __version__
|
|
|
|
|
|
class Cache:
|
|
def __init__(self, ydl):
|
|
self._ydl = ydl
|
|
|
|
def _get_root_dir(self):
|
|
res = self._ydl.params.get('cachedir')
|
|
if res is None:
|
|
cache_root = os.getenv('XDG_CACHE_HOME', '~/.cache')
|
|
res = os.path.join(cache_root, 'yt-dlp')
|
|
return expand_path(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, f'{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
|
|
self._ydl.write_debug(f'Saving {section}.{key} to cache')
|
|
write_json_file({'yt-dlp_version': __version__, 'data': data}, fn)
|
|
except Exception:
|
|
tb = traceback.format_exc()
|
|
self._ydl.report_warning(f'Writing cache to {fn!r} failed: {tb}')
|
|
|
|
def _validate(self, data, min_ver):
|
|
version = traverse_obj(data, 'yt-dlp_version')
|
|
if not version: # Backward compatibility
|
|
data, version = {'data': data}, '2022.08.19'
|
|
if not min_ver or version_tuple(version) >= version_tuple(min_ver):
|
|
return data['data']
|
|
self._ydl.write_debug(f'Discarding old cache from version {version} (needs {min_ver})')
|
|
|
|
def load(self, section, key, dtype='json', default=None, *, min_ver=None):
|
|
assert dtype in ('json',)
|
|
|
|
if not self.enabled:
|
|
return default
|
|
|
|
cache_fn = self._get_cache_fn(section, key, dtype)
|
|
with contextlib.suppress(OSError):
|
|
try:
|
|
with open(cache_fn, encoding='utf-8') as cachef:
|
|
self._ydl.write_debug(f'Loading {section}.{key} from cache')
|
|
return self._validate(json.load(cachef), min_ver)
|
|
except (ValueError, KeyError):
|
|
try:
|
|
file_size = os.path.getsize(cache_fn)
|
|
except OSError as oe:
|
|
file_size = str(oe)
|
|
self._ydl.report_warning(f'Cache retrieval from {cache_fn} failed ({file_size})')
|
|
|
|
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('.')
|