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Commit | Line | Data |
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f0b5d6af PH |
1 | from __future__ import unicode_literals |
2 | ||
f0b5d6af | 3 | import re |
e154c651 | 4 | import binascii |
5 | try: | |
6 | from Crypto.Cipher import AES | |
7 | can_decrypt_frag = True | |
8 | except ImportError: | |
9 | can_decrypt_frag = False | |
3bc2ddcc | 10 | |
f9a5affa | 11 | from .fragment import FragmentFD |
0d66bd0e | 12 | from .external import FFmpegFD |
f9a5affa | 13 | |
e154c651 | 14 | from ..compat import ( |
25afc2a7 | 15 | compat_urllib_error, |
e154c651 | 16 | compat_urlparse, |
17 | compat_struct_pack, | |
18 | ) | |
1cc79574 | 19 | from ..utils import ( |
e154c651 | 20 | parse_m3u8_attributes, |
aaf44a2f | 21 | update_url_query, |
3bc2ddcc JMF |
22 | ) |
23 | ||
24 | ||
12b84ac8 | 25 | class HlsFD(FragmentFD): |
26 | """ A limited implementation that does not require ffmpeg """ | |
f0b5d6af | 27 | |
f9a5affa S |
28 | FD_NAME = 'hlsnative' |
29 | ||
0d66bd0e | 30 | @staticmethod |
6f126d90 | 31 | def can_download(manifest, info_dict): |
0d66bd0e | 32 | UNSUPPORTED_FEATURES = ( |
e154c651 | 33 | r'#EXT-X-KEY:METHOD=(?!NONE|AES-128)', # encrypted streams [1] |
f5974637 | 34 | # r'#EXT-X-BYTERANGE', # playlists composed of byte ranges of media files [2] |
1e236d7e | 35 | |
c15c47d1 S |
36 | # Live streams heuristic does not always work (e.g. geo restricted to Germany |
37 | # 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) | |
2937590e | 38 | # r'#EXT-X-MEDIA-SEQUENCE:(?!0$)', # live streams [3] |
1e236d7e S |
39 | |
40 | # This heuristic also is not correct since segments may not be appended as well. | |
633b444f S |
41 | # Twitch vods of finished streams have EXT-X-PLAYLIST-TYPE:EVENT despite |
42 | # no segments will definitely be appended to the end of the playlist. | |
1e236d7e | 43 | # r'#EXT-X-PLAYLIST-TYPE:EVENT', # media segments may be appended to the end of |
51c4d85c | 44 | # # event media playlists [4] |
1e236d7e | 45 | |
0d66bd0e S |
46 | # 1. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.4 |
47 | # 2. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.2 | |
48 | # 3. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.2 | |
6104cc29 | 49 | # 4. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.5 |
0d66bd0e | 50 | ) |
e154c651 | 51 | check_results = [not re.search(feature, manifest) for feature in UNSUPPORTED_FEATURES] |
f5974637 RA |
52 | is_aes128_enc = '#EXT-X-KEY:METHOD=AES-128' in manifest |
53 | check_results.append(can_decrypt_frag or not is_aes128_enc) | |
54 | check_results.append(not (is_aes128_enc and r'#EXT-X-BYTERANGE' in manifest)) | |
2bfaf89b | 55 | check_results.append(not info_dict.get('is_live')) |
e154c651 | 56 | return all(check_results) |
0d66bd0e | 57 | |
f0b5d6af | 58 | def real_download(self, filename, info_dict): |
f9a5affa S |
59 | man_url = info_dict['url'] |
60 | self.to_screen('[%s] Downloading m3u8 manifest' % self.FD_NAME) | |
69035555 S |
61 | |
62 | manifest = self.ydl.urlopen(self._prepare_url(info_dict, man_url)).read() | |
f0b5d6af | 63 | |
f9a5affa | 64 | s = manifest.decode('utf-8', 'ignore') |
0d66bd0e | 65 | |
6f126d90 | 66 | if not self.can_download(s, info_dict): |
bfa1073e RA |
67 | if info_dict.get('extra_param_to_segment_url'): |
68 | self.report_error('pycrypto not found. Please install it.') | |
69 | return False | |
2bfaf89b RA |
70 | self.report_warning( |
71 | 'hlsnative has detected features it does not support, ' | |
72 | 'extraction will be delegated to ffmpeg') | |
73 | fd = FFmpegFD(self.ydl, self.params) | |
74 | for ph in self._progress_hooks: | |
75 | fd.add_progress_hook(ph) | |
76 | return fd.real_download(filename, info_dict) | |
0d66bd0e | 77 | |
e154c651 | 78 | total_frags = 0 |
f0b5d6af PH |
79 | for line in s.splitlines(): |
80 | line = line.strip() | |
81 | if line and not line.startswith('#'): | |
e154c651 | 82 | total_frags += 1 |
f0b5d6af | 83 | |
f9a5affa | 84 | ctx = { |
f0b5d6af | 85 | 'filename': filename, |
e154c651 | 86 | 'total_frags': total_frags, |
f9a5affa S |
87 | } |
88 | ||
89 | self._prepare_and_start_frag_download(ctx) | |
90 | ||
25afc2a7 S |
91 | fragment_retries = self.params.get('fragment_retries', 0) |
92 | skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True) | |
93 | test = self.params.get('test', False) | |
94 | ||
b8079a40 | 95 | extra_query = None |
aaf44a2f | 96 | extra_param_to_segment_url = info_dict.get('extra_param_to_segment_url') |
b8079a40 RA |
97 | if extra_param_to_segment_url: |
98 | extra_query = compat_urlparse.parse_qs(extra_param_to_segment_url) | |
e154c651 | 99 | i = 0 |
100 | media_sequence = 0 | |
101 | decrypt_info = {'METHOD': 'NONE'} | |
f5974637 | 102 | byte_range = {} |
75a24854 | 103 | frag_index = 0 |
e154c651 | 104 | for line in s.splitlines(): |
105 | line = line.strip() | |
106 | if line: | |
107 | if not line.startswith('#'): | |
75a24854 | 108 | frag_index += 1 |
3e0304fe | 109 | if frag_index <= ctx['fragment_index']: |
75a24854 | 110 | continue |
e154c651 | 111 | frag_url = ( |
112 | line | |
113 | if re.match(r'^https?://', line) | |
114 | else compat_urlparse.urljoin(man_url, line)) | |
b8079a40 RA |
115 | if extra_query: |
116 | frag_url = update_url_query(frag_url, extra_query) | |
25afc2a7 | 117 | count = 0 |
f5974637 RA |
118 | headers = info_dict.get('http_headers', {}) |
119 | if byte_range: | |
120 | headers['Range'] = 'bytes=%d-%d' % (byte_range['start'], byte_range['end']) | |
25afc2a7 S |
121 | while count <= fragment_retries: |
122 | try: | |
75a24854 RA |
123 | success, frag_content = self._download_fragment( |
124 | ctx, frag_url, info_dict, headers) | |
25afc2a7 S |
125 | if not success: |
126 | return False | |
25afc2a7 | 127 | break |
2e99cd30 | 128 | except compat_urllib_error.HTTPError as err: |
25afc2a7 S |
129 | # Unavailable (possibly temporary) fragments may be served. |
130 | # First we try to retry then either skip or abort. | |
131 | # See https://github.com/rg3/youtube-dl/issues/10165, | |
132 | # https://github.com/rg3/youtube-dl/issues/10448). | |
133 | count += 1 | |
134 | if count <= fragment_retries: | |
75a24854 | 135 | self.report_retry_fragment(err, frag_index, count, fragment_retries) |
25afc2a7 S |
136 | if count > fragment_retries: |
137 | if skip_unavailable_fragments: | |
138 | i += 1 | |
139 | media_sequence += 1 | |
75a24854 | 140 | self.report_skip_fragment(frag_index) |
25afc2a7 S |
141 | continue |
142 | self.report_error( | |
143 | 'giving up after %s fragment retries' % fragment_retries) | |
e154c651 | 144 | return False |
e154c651 | 145 | if decrypt_info['METHOD'] == 'AES-128': |
8369a4fe | 146 | iv = decrypt_info.get('IV') or compat_struct_pack('>8xq', media_sequence) |
75a24854 | 147 | decrypt_info['KEY'] = decrypt_info.get('KEY') or self.ydl.urlopen(decrypt_info['URI']).read() |
8369a4fe S |
148 | frag_content = AES.new( |
149 | decrypt_info['KEY'], AES.MODE_CBC, iv).decrypt(frag_content) | |
75a24854 | 150 | self._append_fragment(ctx, frag_content) |
e154c651 | 151 | # We only download the first fragment during the test |
25afc2a7 | 152 | if test: |
e154c651 | 153 | break |
154 | i += 1 | |
155 | media_sequence += 1 | |
156 | elif line.startswith('#EXT-X-KEY'): | |
75a24854 | 157 | decrypt_url = decrypt_info.get('URI') |
e154c651 | 158 | decrypt_info = parse_m3u8_attributes(line[11:]) |
159 | if decrypt_info['METHOD'] == 'AES-128': | |
160 | if 'IV' in decrypt_info: | |
07ea9c9b | 161 | decrypt_info['IV'] = binascii.unhexlify(decrypt_info['IV'][2:].zfill(32)) |
e154c651 | 162 | if not re.match(r'^https?://', decrypt_info['URI']): |
8369a4fe S |
163 | decrypt_info['URI'] = compat_urlparse.urljoin( |
164 | man_url, decrypt_info['URI']) | |
b8079a40 RA |
165 | if extra_query: |
166 | decrypt_info['URI'] = update_url_query(decrypt_info['URI'], extra_query) | |
75a24854 RA |
167 | if decrypt_url != decrypt_info['URI']: |
168 | decrypt_info['KEY'] = None | |
e154c651 | 169 | elif line.startswith('#EXT-X-MEDIA-SEQUENCE'): |
170 | media_sequence = int(line[22:]) | |
f5974637 RA |
171 | elif line.startswith('#EXT-X-BYTERANGE'): |
172 | splitted_byte_range = line[17:].split('@') | |
173 | sub_range_start = int(splitted_byte_range[1]) if len(splitted_byte_range) == 2 else byte_range['end'] | |
174 | byte_range = { | |
175 | 'start': sub_range_start, | |
176 | 'end': sub_range_start + int(splitted_byte_range[0]), | |
177 | } | |
f9a5affa S |
178 | |
179 | self._finish_frag_download(ctx) | |
180 | ||
f0b5d6af | 181 | return True |