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import sys |
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import codecs |
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import os.path |
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from flask._compat import with_metaclass |
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from werkzeug.utils import cached_property |
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from browsepy.compat import range, str_base, PY_LEGACY |
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from browsepy.file import File, undescore_replace, check_under_base |
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if PY_LEGACY: |
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import ConfigParser as configparser |
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else: |
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import configparser |
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mimetypes = { |
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'mp3': 'audio/mpeg', |
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'ogg': 'audio/ogg', |
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'wav': 'audio/wav', |
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'm3u': 'audio/x-mpegurl', |
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'm3u8': 'audio/x-mpegurl', |
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'pls': 'audio/x-scpls', |
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} |
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class PlayableFile(File): |
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parent_class = File |
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media_map = { |
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'audio/mpeg': 'mp3', |
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'audio/ogg': 'ogg', |
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'audio/wav': 'wav', |
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} |
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def __init__(self, duration=None, title=None, **kwargs): |
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self.duration = duration |
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self.title = title |
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super(PlayableFile, self).__init__(**kwargs) |
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@property |
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def title(self): |
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return self._title or self.name |
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@title.setter |
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def title(self, title): |
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self._title = title |
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@property |
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def media_format(self): |
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return self.media_map[self.type] |
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class MetaPlayListFile(type): |
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def __init__(cls, name, bases, nmspc): |
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''' |
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Abstract-class mimetype-based implementation registration on nearest |
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abstract parent. |
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''' |
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type.__init__(cls, name, bases, nmspc) |
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if cls.abstract_class is None: |
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cls.specific_classes = {} |
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cls.abstract_class = cls |
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elif isinstance(cls.mimetype, str_base): |
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cls.abstract_class.specific_classes[cls.mimetype] = cls |
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class PlayListFile(with_metaclass(MetaPlayListFile, File)): |
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abstract_class = None |
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playable_class = PlayableFile |
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def __new__(cls, *args, **kwargs): |
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''' |
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Polimorfic mimetype-based constructor |
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''' |
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self = super(PlayListFile, cls).__new__(cls) |
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if cls is cls.abstract_class: |
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self.__init__(*args, **kwargs) |
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if self.mimetype in cls.abstract_class.specific_classes: |
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return cls.specific_classes[self.mimetype](*args, **kwargs) |
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return self |
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def iter_files(self): |
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if False: |
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yield |
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def normalize_playable_path(self, path): |
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if not os.path.isabs(path): |
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path = os.path.normpath(os.path.join(self.parent.path, path)) |
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if check_under_base(path, self.app.config['directory_base']): |
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return path |
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return None |
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class PLSFile(PlayListFile): |
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ini_parser_cls = ( |
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configparser.SafeConfigParser |
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if hasattr(configparser, 'SafeConfigParser') else |
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configparser.ConfigParser |
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) |
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maxsize = getattr(sys, 'maxsize', None) or getattr(sys, 'maxint', None) |
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mimetype = 'audio/x-scpls' |
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@cached_property |
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def _parser(self): |
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parser = self.ini_parser() |
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parser.read(self.path) |
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return parser |
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def iter_files(self): |
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maxsize = self._parser.getint('playlist', 'NumberOfEntries', None) |
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for i in range(self.maxsize if maxsize is None else maxsize): |
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pf = self.playable_class( |
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path = self.normalize_playable_path( |
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self._parser.get('playlist', 'File%d' % i, None) |
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), |
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duration = self._parser.getint('playlist', 'Length%d' % i, None), |
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title = self._parser.get('playlist', 'Title%d' % i, None), |
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) |
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if pf.path: |
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yield pf |
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elif maxsize is None: |
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break |
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class M3UFile(PlayListFile): |
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mimetype = 'audio/x-mpegurl' |
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def _extract_line(self, line, file=None): |
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if line.startswith('#EXTINF:'): |
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duration, title = line.split(',', 1) |
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file.duration = None if duration == '-1' else int(duration) |
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file.title = title |
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return False |
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file.path = self.normalize_playable_path(line) |
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return not file.path is None |
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def iter_files(self): |
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prefix = '#EXTM3U\n' |
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encoding = 'utf-8' if self.path.endswith('.m3u8') else 'ascii' |
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with codecs.open(self.path, 'r', encoding=encoding, errors=undescore_replace) as f: |
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if f.read(len(prefix)) == prefix: |
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pf = PlayableFile() |
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for line in f: |
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line = line.rstrip('\n', 1) |
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if line and self._extract_line(line, pf): |
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yield pf |
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pf = PlayableFile() |
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ergoithz /
browsepy
