- cache_enabled = cache_dir is not None
- if cache_enabled:
- cache_fn = os.path.join(os.path.expanduser(cache_dir),
- u'youtube-sigfuncs',
- func_id + '.json')
- try:
- with io.open(cache_fn, 'r', encoding='utf-8') as cachef:
- cache_spec = json.load(cachef)
- return lambda s: u''.join(s[i] for i in cache_spec)
- except IOError:
- pass # No cache available
- except ValueError:
- try:
- file_size = os.path.getsize(cache_fn)
- except (OSError, IOError) as oe:
- file_size = str(oe)
- self._downloader.report_warning(
- u'Cache %s failed (%s)' % (cache_fn, file_size))
+ cache_spec = self._downloader.cache.load(u'youtube-sigfuncs', func_id)
+ if cache_spec is not None:
+ return lambda s: u''.join(s[i] for i in cache_spec)