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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 | 61 | |
c5a49ff0 S |
62 | urlh = self.ydl.urlopen(self._prepare_url(info_dict, man_url)) |
63 | man_url = urlh.geturl() | |
64 | s = urlh.read().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 | |
74c42d9e S |
78 | def anvato_ad(s): |
79 | return s.startswith('#ANVATO-SEGMENT-INFO') and 'type=ad' in s | |
80 | ||
81 | media_frags = 0 | |
82 | ad_frags = 0 | |
83 | ad_frag_next = False | |
f0b5d6af PH |
84 | for line in s.splitlines(): |
85 | line = line.strip() | |
74c42d9e S |
86 | if not line: |
87 | continue | |
88 | if line.startswith('#'): | |
89 | if anvato_ad(line): | |
90 | ad_frags += 1 | |
a9ee4f6e | 91 | ad_frag_next = True |
74c42d9e S |
92 | continue |
93 | if ad_frag_next: | |
94 | ad_frag_next = False | |
95 | continue | |
96 | media_frags += 1 | |
f0b5d6af | 97 | |
f9a5affa | 98 | ctx = { |
f0b5d6af | 99 | 'filename': filename, |
74c42d9e S |
100 | 'total_frags': media_frags, |
101 | 'ad_frags': ad_frags, | |
f9a5affa S |
102 | } |
103 | ||
104 | self._prepare_and_start_frag_download(ctx) | |
105 | ||
25afc2a7 S |
106 | fragment_retries = self.params.get('fragment_retries', 0) |
107 | skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True) | |
108 | test = self.params.get('test', False) | |
109 | ||
b8079a40 | 110 | extra_query = None |
aaf44a2f | 111 | extra_param_to_segment_url = info_dict.get('extra_param_to_segment_url') |
b8079a40 RA |
112 | if extra_param_to_segment_url: |
113 | extra_query = compat_urlparse.parse_qs(extra_param_to_segment_url) | |
e154c651 | 114 | i = 0 |
115 | media_sequence = 0 | |
116 | decrypt_info = {'METHOD': 'NONE'} | |
f5974637 | 117 | byte_range = {} |
75a24854 | 118 | frag_index = 0 |
74c42d9e | 119 | ad_frag_next = False |
e154c651 | 120 | for line in s.splitlines(): |
121 | line = line.strip() | |
122 | if line: | |
123 | if not line.startswith('#'): | |
74c42d9e S |
124 | if ad_frag_next: |
125 | ad_frag_next = False | |
126 | continue | |
75a24854 | 127 | frag_index += 1 |
3e0304fe | 128 | if frag_index <= ctx['fragment_index']: |
75a24854 | 129 | continue |
e154c651 | 130 | frag_url = ( |
131 | line | |
132 | if re.match(r'^https?://', line) | |
133 | else compat_urlparse.urljoin(man_url, line)) | |
b8079a40 RA |
134 | if extra_query: |
135 | frag_url = update_url_query(frag_url, extra_query) | |
25afc2a7 | 136 | count = 0 |
f5974637 RA |
137 | headers = info_dict.get('http_headers', {}) |
138 | if byte_range: | |
139 | headers['Range'] = 'bytes=%d-%d' % (byte_range['start'], byte_range['end']) | |
25afc2a7 S |
140 | while count <= fragment_retries: |
141 | try: | |
75a24854 RA |
142 | success, frag_content = self._download_fragment( |
143 | ctx, frag_url, info_dict, headers) | |
25afc2a7 S |
144 | if not success: |
145 | return False | |
25afc2a7 | 146 | break |
2e99cd30 | 147 | except compat_urllib_error.HTTPError as err: |
25afc2a7 S |
148 | # Unavailable (possibly temporary) fragments may be served. |
149 | # First we try to retry then either skip or abort. | |
150 | # See https://github.com/rg3/youtube-dl/issues/10165, | |
151 | # https://github.com/rg3/youtube-dl/issues/10448). | |
152 | count += 1 | |
153 | if count <= fragment_retries: | |
75a24854 | 154 | self.report_retry_fragment(err, frag_index, count, fragment_retries) |
25afc2a7 S |
155 | if count > fragment_retries: |
156 | if skip_unavailable_fragments: | |
157 | i += 1 | |
158 | media_sequence += 1 | |
75a24854 | 159 | self.report_skip_fragment(frag_index) |
25afc2a7 S |
160 | continue |
161 | self.report_error( | |
162 | 'giving up after %s fragment retries' % fragment_retries) | |
e154c651 | 163 | return False |
e154c651 | 164 | if decrypt_info['METHOD'] == 'AES-128': |
8369a4fe | 165 | iv = decrypt_info.get('IV') or compat_struct_pack('>8xq', media_sequence) |
75a24854 | 166 | decrypt_info['KEY'] = decrypt_info.get('KEY') or self.ydl.urlopen(decrypt_info['URI']).read() |
8369a4fe S |
167 | frag_content = AES.new( |
168 | decrypt_info['KEY'], AES.MODE_CBC, iv).decrypt(frag_content) | |
75a24854 | 169 | self._append_fragment(ctx, frag_content) |
e154c651 | 170 | # We only download the first fragment during the test |
25afc2a7 | 171 | if test: |
e154c651 | 172 | break |
173 | i += 1 | |
174 | media_sequence += 1 | |
175 | elif line.startswith('#EXT-X-KEY'): | |
75a24854 | 176 | decrypt_url = decrypt_info.get('URI') |
e154c651 | 177 | decrypt_info = parse_m3u8_attributes(line[11:]) |
178 | if decrypt_info['METHOD'] == 'AES-128': | |
179 | if 'IV' in decrypt_info: | |
07ea9c9b | 180 | decrypt_info['IV'] = binascii.unhexlify(decrypt_info['IV'][2:].zfill(32)) |
e154c651 | 181 | if not re.match(r'^https?://', decrypt_info['URI']): |
8369a4fe S |
182 | decrypt_info['URI'] = compat_urlparse.urljoin( |
183 | man_url, decrypt_info['URI']) | |
b8079a40 RA |
184 | if extra_query: |
185 | decrypt_info['URI'] = update_url_query(decrypt_info['URI'], extra_query) | |
75a24854 RA |
186 | if decrypt_url != decrypt_info['URI']: |
187 | decrypt_info['KEY'] = None | |
e154c651 | 188 | elif line.startswith('#EXT-X-MEDIA-SEQUENCE'): |
189 | media_sequence = int(line[22:]) | |
f5974637 RA |
190 | elif line.startswith('#EXT-X-BYTERANGE'): |
191 | splitted_byte_range = line[17:].split('@') | |
192 | sub_range_start = int(splitted_byte_range[1]) if len(splitted_byte_range) == 2 else byte_range['end'] | |
193 | byte_range = { | |
194 | 'start': sub_range_start, | |
195 | 'end': sub_range_start + int(splitted_byte_range[0]), | |
196 | } | |
74c42d9e S |
197 | elif anvato_ad(line): |
198 | ad_frag_next = True | |
f9a5affa S |
199 | |
200 | self._finish_frag_download(ctx) | |
201 | ||
f0b5d6af | 202 | return True |