1 from __future__ import unicode_literals
7 from Crypto.Cipher import AES
8 can_decrypt_frag = True
10 can_decrypt_frag = False
12 from .fragment import FragmentFD
13 from .external import FFmpegFD
15 from ..compat import (
23 parse_m3u8_attributes,
28 class HlsFD(FragmentFD):
29 """ A limited implementation that does not require ffmpeg """
34 def can_download(manifest):
35 UNSUPPORTED_FEATURES = (
36 r'#EXT-X-KEY:METHOD=(?!NONE|AES-128)', # encrypted streams [1]
37 r'#EXT-X-BYTERANGE', # playlists composed of byte ranges of media files [2]
39 # Live streams heuristic does not always work (e.g. geo restricted to Germany
40 # http://hls-geo.daserste.de/i/videoportal/Film/c_620000/622873/format,716451,716457,716450,716458,716459,.mp4.csmil/index_4_av.m3u8?null=0)
41 # r'#EXT-X-MEDIA-SEQUENCE:(?!0$)', # live streams [3]
43 # This heuristic also is not correct since segments may not be appended as well.
44 # Twitch vods of finished streams have EXT-X-PLAYLIST-TYPE:EVENT despite
45 # no segments will definitely be appended to the end of the playlist.
46 # r'#EXT-X-PLAYLIST-TYPE:EVENT', # media segments may be appended to the end of
47 # # event media playlists [4]
49 # 1. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.4
50 # 2. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.2
51 # 3. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.2
52 # 4. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.5
54 check_results = [not re.search(feature, manifest) for feature in UNSUPPORTED_FEATURES]
55 check_results.append(can_decrypt_frag or '#EXT-X-KEY:METHOD=AES-128' not in manifest)
56 return all(check_results)
58 def real_download(self, filename, info_dict):
59 man_url = info_dict['url']
60 self.to_screen('[%s] Downloading m3u8 manifest' % self.FD_NAME)
61 manifest = self.ydl.urlopen(man_url).read()
63 s = manifest.decode('utf-8', 'ignore')
65 if not self.can_download(s):
67 'hlsnative has detected features it does not support, '
68 'extraction will be delegated to ffmpeg')
69 fd = FFmpegFD(self.ydl, self.params)
70 for ph in self._progress_hooks:
71 fd.add_progress_hook(ph)
72 return fd.real_download(filename, info_dict)
75 for line in s.splitlines():
77 if line and not line.startswith('#'):
82 'total_frags': total_frags,
85 self._prepare_and_start_frag_download(ctx)
87 fragment_retries = self.params.get('fragment_retries', 0)
88 skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True)
89 test = self.params.get('test', False)
92 extra_param_to_segment_url = info_dict.get('extra_param_to_segment_url')
93 if extra_param_to_segment_url:
94 extra_query = compat_urlparse.parse_qs(extra_param_to_segment_url)
97 decrypt_info = {'METHOD': 'NONE'}
99 for line in s.splitlines():
102 if not line.startswith('#'):
105 if re.match(r'^https?://', line)
106 else compat_urlparse.urljoin(man_url, line))
107 frag_name = 'Frag%d' % i
108 frag_filename = '%s-%s' % (ctx['tmpfilename'], frag_name)
110 frag_url = update_url_query(frag_url, extra_query)
112 while count <= fragment_retries:
114 success = ctx['dl'].download(frag_filename, {'url': frag_url})
117 down, frag_sanitized = sanitize_open(frag_filename, 'rb')
118 frag_content = down.read()
121 except compat_urllib_error.HTTPError as err:
122 # Unavailable (possibly temporary) fragments may be served.
123 # First we try to retry then either skip or abort.
124 # See https://github.com/rg3/youtube-dl/issues/10165,
125 # https://github.com/rg3/youtube-dl/issues/10448).
127 if count <= fragment_retries:
128 self.report_retry_fragment(err, frag_name, count, fragment_retries)
129 if count > fragment_retries:
130 if skip_unavailable_fragments:
133 self.report_skip_fragment(frag_name)
136 'giving up after %s fragment retries' % fragment_retries)
138 if decrypt_info['METHOD'] == 'AES-128':
139 iv = decrypt_info.get('IV') or compat_struct_pack('>8xq', media_sequence)
140 frag_content = AES.new(
141 decrypt_info['KEY'], AES.MODE_CBC, iv).decrypt(frag_content)
142 ctx['dest_stream'].write(frag_content)
143 frags_filenames.append(frag_sanitized)
144 # We only download the first fragment during the test
149 elif line.startswith('#EXT-X-KEY'):
150 decrypt_info = parse_m3u8_attributes(line[11:])
151 if decrypt_info['METHOD'] == 'AES-128':
152 if 'IV' in decrypt_info:
153 decrypt_info['IV'] = binascii.unhexlify(decrypt_info['IV'][2:].zfill(32))
154 if not re.match(r'^https?://', decrypt_info['URI']):
155 decrypt_info['URI'] = compat_urlparse.urljoin(
156 man_url, decrypt_info['URI'])
158 decrypt_info['URI'] = update_url_query(decrypt_info['URI'], extra_query)
159 decrypt_info['KEY'] = self.ydl.urlopen(decrypt_info['URI']).read()
160 elif line.startswith('#EXT-X-MEDIA-SEQUENCE'):
161 media_sequence = int(line[22:])
163 self._finish_frag_download(ctx)
165 for frag_file in frags_filenames:
166 os.remove(encodeFilename(frag_file))