Merge branch 'automatic-signatures'
This commit is contained in:
Philipp Hagemeister
1
.gitignore
vendored
1
.gitignore
vendored
@@ -24,3 +24,4 @@ updates_key.pem
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*.flv
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*.mp4
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*.part
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test/testdata
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80
test/test_youtube_signature.py
Normal file
80
test/test_youtube_signature.py
Normal file
@@ -0,0 +1,80 @@
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#!/usr/bin/env python
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import io
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import re
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import string
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import sys
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import unittest
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# Allow direct execution
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import os
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sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
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from youtube_dl.extractor import YoutubeIE
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from youtube_dl.utils import compat_str, compat_urlretrieve
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_TESTS = [
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(
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u'https://s.ytimg.com/yts/jsbin/html5player-vflHOr_nV.js',
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u'js',
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86,
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u'>=<;:/.-[+*)(\'&%$#"!ZYX0VUTSRQPONMLKJIHGFEDCBA\\yxwvutsrqponmlkjihgfedcba987654321',
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),
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(
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u'https://s.ytimg.com/yts/jsbin/html5player-vfldJ8xgI.js',
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u'js',
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85,
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u'3456789a0cdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRS[UVWXYZ!"#$%&\'()*+,-./:;<=>?@',
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),
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(
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u'https://s.ytimg.com/yts/swfbin/watch_as3-vflg5GhxU.swf',
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u'swf',
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82,
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u':/.-,+*)=\'&%$#"!ZYX0VUTSRQPONMLKJIHGFEDCBAzyxw>utsrqponmlkjihgfedcba987654321'
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),
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]
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class TestSignature(unittest.TestCase):
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def setUp(self):
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TEST_DIR = os.path.dirname(os.path.abspath(__file__))
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self.TESTDATA_DIR = os.path.join(TEST_DIR, 'testdata')
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if not os.path.exists(self.TESTDATA_DIR):
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os.mkdir(self.TESTDATA_DIR)
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def make_tfunc(url, stype, sig_length, expected_sig):
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basename = url.rpartition('/')[2]
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m = re.match(r'.*-([a-zA-Z0-9_-]+)\.[a-z]+$', basename)
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assert m, '%r should follow URL format' % basename
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test_id = m.group(1)
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def test_func(self):
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fn = os.path.join(self.TESTDATA_DIR, basename)
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if not os.path.exists(fn):
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compat_urlretrieve(url, fn)
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ie = YoutubeIE()
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if stype == 'js':
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with io.open(fn, encoding='utf-8') as testf:
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jscode = testf.read()
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func = ie._parse_sig_js(jscode)
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else:
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assert stype == 'swf'
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with open(fn, 'rb') as testf:
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swfcode = testf.read()
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func = ie._parse_sig_swf(swfcode)
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src_sig = compat_str(string.printable[:sig_length])
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got_sig = func(src_sig)
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self.assertEqual(got_sig, expected_sig)
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test_func.__name__ = str('test_signature_' + stype + '_' + test_id)
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setattr(TestSignature, test_func.__name__, test_func)
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for test_spec in _TESTS:
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make_tfunc(*test_spec)
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if __name__ == '__main__':
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unittest.main()
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@@ -81,6 +81,8 @@ class YoutubeDL(object):
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keepvideo: Keep the video file after post-processing
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daterange: A DateRange object, download only if the upload_date is in the range.
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skip_download: Skip the actual download of the video file
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cachedir: Location of the cache files in the filesystem.
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None to disable filesystem cache.
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The following parameters are not used by YoutubeDL itself, they are used by
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the FileDownloader:
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@@ -167,6 +167,12 @@ def parseOpts(overrideArguments=None):
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help='Output descriptions of all supported extractors', default=False)
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general.add_option('--proxy', dest='proxy', default=None, help='Use the specified HTTP/HTTPS proxy', metavar='URL')
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general.add_option('--no-check-certificate', action='store_true', dest='no_check_certificate', default=False, help='Suppress HTTPS certificate validation.')
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general.add_option(
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'--cache-dir', dest='cachedir', default=u'~/.youtube-dl/cache',
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help='Location in the filesystem where youtube-dl can store downloaded information permanently. %default by default')
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general.add_option(
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'--no-cache-dir', action='store_const', const=None, dest='cachedir',
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help='Disable filesystem caching')
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selection.add_option('--playlist-start',
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@@ -272,6 +278,10 @@ def parseOpts(overrideArguments=None):
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verbosity.add_option('--dump-intermediate-pages',
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action='store_true', dest='dump_intermediate_pages', default=False,
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help='print downloaded pages to debug problems(very verbose)')
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verbosity.add_option('--youtube-print-sig-code',
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action='store_true', dest='youtube_print_sig_code', default=False,
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help=optparse.SUPPRESS_HELP)
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filesystem.add_option('-t', '--title',
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action='store_true', dest='usetitle', help='use title in file name (default)', default=False)
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@@ -555,7 +565,7 @@ def _real_main(argv=None):
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parser.error(u'Cannot download a video and extract audio into the same'
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u' file! Use "%%(ext)s" instead of %r' %
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determine_ext(outtmpl, u''))
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raise ValueError(repr(opts.cachedir))
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# YoutubeDL
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ydl = YoutubeDL({
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'usenetrc': opts.usenetrc,
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@@ -613,6 +623,8 @@ def _real_main(argv=None):
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'min_filesize': opts.min_filesize,
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'max_filesize': opts.max_filesize,
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'daterange': date,
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'cachedir': opts.cachedir,
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'youtube_print_sig_code': opts.youtube_print_sig_code,
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})
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if opts.verbose:
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@@ -1,15 +1,23 @@
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# coding: utf-8
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import collections
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import errno
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import io
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import itertools
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import json
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import netrc
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import os.path
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import re
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import socket
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import itertools
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import string
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import struct
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import traceback
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import xml.etree.ElementTree
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import zlib
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from .common import InfoExtractor, SearchInfoExtractor
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from .subtitles import SubtitlesInfoExtractor
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from ..utils import (
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compat_chr,
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compat_http_client,
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compat_parse_qs,
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compat_urllib_error,
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@@ -23,6 +31,7 @@ from ..utils import (
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unescapeHTML,
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unified_strdate,
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orderedSet,
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write_json_file,
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)
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class YoutubeBaseInfoExtractor(InfoExtractor):
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@@ -393,6 +402,10 @@ class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
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if YoutubePlaylistIE.suitable(url): return False
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return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
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def __init__(self, *args, **kwargs):
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super(YoutubeIE, self).__init__(*args, **kwargs)
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self._player_cache = {}
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def report_video_webpage_download(self, video_id):
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"""Report attempt to download video webpage."""
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self.to_screen(u'%s: Downloading video webpage' % video_id)
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@@ -413,9 +426,657 @@ class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
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"""Indicate the download will use the RTMP protocol."""
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self.to_screen(u'RTMP download detected')
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def _decrypt_signature(self, s):
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def _extract_signature_function(self, video_id, player_url, slen):
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id_m = re.match(r'.*-(?P<id>[a-zA-Z0-9_-]+)\.(?P<ext>[a-z]+)$',
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player_url)
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player_type = id_m.group('ext')
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player_id = id_m.group('id')
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# Read from filesystem cache
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func_id = '%s_%s_%d' % (player_type, player_id, slen)
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assert os.path.basename(func_id) == func_id
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cache_dir = self._downloader.params.get('cachedir',
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u'~/.youtube-dl/cache')
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cache_enabled = cache_dir is not None
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if cache_enabled:
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cache_fn = os.path.join(os.path.expanduser(cache_dir),
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u'youtube-sigfuncs',
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func_id + '.json')
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try:
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with io.open(cache_fn, 'r', encoding='utf-8') as cachef:
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cache_spec = json.load(cachef)
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return lambda s: u''.join(s[i] for i in cache_spec)
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except IOError:
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pass # No cache available
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if player_type == 'js':
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code = self._download_webpage(
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player_url, video_id,
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note=u'Downloading %s player %s' % (player_type, player_id),
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errnote=u'Download of %s failed' % player_url)
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res = self._parse_sig_js(code)
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elif player_type == 'swf':
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urlh = self._request_webpage(
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player_url, video_id,
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note=u'Downloading %s player %s' % (player_type, player_id),
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errnote=u'Download of %s failed' % player_url)
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code = urlh.read()
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res = self._parse_sig_swf(code)
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else:
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assert False, 'Invalid player type %r' % player_type
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if cache_enabled:
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try:
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test_string = u''.join(map(compat_chr, range(slen)))
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cache_res = res(test_string)
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cache_spec = [ord(c) for c in cache_res]
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try:
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os.makedirs(os.path.dirname(cache_fn))
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except OSError as ose:
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if ose.errno != errno.EEXIST:
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raise
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write_json_file(cache_spec, cache_fn)
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except Exception:
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tb = traceback.format_exc()
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self._downloader.report_warning(
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u'Writing cache to %r failed: %s' % (cache_fn, tb))
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return res
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def _print_sig_code(self, func, slen):
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def gen_sig_code(idxs):
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def _genslice(start, end, step):
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starts = u'' if start == 0 else str(start)
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ends = (u':%d' % (end+step)) if end + step >= 0 else u':'
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steps = u'' if step == 1 else (u':%d' % step)
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return u's[%s%s%s]' % (starts, ends, steps)
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step = None
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start = '(Never used)' # Quelch pyflakes warnings - start will be
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# set as soon as step is set
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for i, prev in zip(idxs[1:], idxs[:-1]):
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if step is not None:
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if i - prev == step:
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continue
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yield _genslice(start, prev, step)
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step = None
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continue
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if i - prev in [-1, 1]:
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step = i - prev
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start = prev
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continue
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else:
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yield u's[%d]' % prev
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if step is None:
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yield u's[%d]' % i
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else:
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yield _genslice(start, i, step)
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|
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test_string = u''.join(map(compat_chr, range(slen)))
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cache_res = func(test_string)
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cache_spec = [ord(c) for c in cache_res]
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expr_code = u' + '.join(gen_sig_code(cache_spec))
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code = u'if len(s) == %d:\n return %s\n' % (slen, expr_code)
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self.to_screen(u'Extracted signature function:\n' + code)
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|
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def _parse_sig_js(self, jscode):
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funcname = self._search_regex(
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r'signature=([a-zA-Z]+)', jscode,
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u'Initial JS player signature function name')
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|
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functions = {}
|
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|
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def argidx(varname):
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return string.lowercase.index(varname)
|
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|
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def interpret_statement(stmt, local_vars, allow_recursion=20):
|
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if allow_recursion < 0:
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raise ExtractorError(u'Recursion limit reached')
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|
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if stmt.startswith(u'var '):
|
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stmt = stmt[len(u'var '):]
|
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ass_m = re.match(r'^(?P<out>[a-z]+)(?:\[(?P<index>[^\]]+)\])?' +
|
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r'=(?P<expr>.*)$', stmt)
|
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if ass_m:
|
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if ass_m.groupdict().get('index'):
|
||||
def assign(val):
|
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lvar = local_vars[ass_m.group('out')]
|
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idx = interpret_expression(ass_m.group('index'),
|
||||
local_vars, allow_recursion)
|
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assert isinstance(idx, int)
|
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lvar[idx] = val
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||||
return val
|
||||
expr = ass_m.group('expr')
|
||||
else:
|
||||
def assign(val):
|
||||
local_vars[ass_m.group('out')] = val
|
||||
return val
|
||||
expr = ass_m.group('expr')
|
||||
elif stmt.startswith(u'return '):
|
||||
assign = lambda v: v
|
||||
expr = stmt[len(u'return '):]
|
||||
else:
|
||||
raise ExtractorError(
|
||||
u'Cannot determine left side of statement in %r' % stmt)
|
||||
|
||||
v = interpret_expression(expr, local_vars, allow_recursion)
|
||||
return assign(v)
|
||||
|
||||
def interpret_expression(expr, local_vars, allow_recursion):
|
||||
if expr.isdigit():
|
||||
return int(expr)
|
||||
|
||||
if expr.isalpha():
|
||||
return local_vars[expr]
|
||||
|
||||
m = re.match(r'^(?P<in>[a-z]+)\.(?P<member>.*)$', expr)
|
||||
if m:
|
||||
member = m.group('member')
|
||||
val = local_vars[m.group('in')]
|
||||
if member == 'split("")':
|
||||
return list(val)
|
||||
if member == 'join("")':
|
||||
return u''.join(val)
|
||||
if member == 'length':
|
||||
return len(val)
|
||||
if member == 'reverse()':
|
||||
return val[::-1]
|
||||
slice_m = re.match(r'slice\((?P<idx>.*)\)', member)
|
||||
if slice_m:
|
||||
idx = interpret_expression(
|
||||
slice_m.group('idx'), local_vars, allow_recursion-1)
|
||||
return val[idx:]
|
||||
|
||||
m = re.match(
|
||||
r'^(?P<in>[a-z]+)\[(?P<idx>.+)\]$', expr)
|
||||
if m:
|
||||
val = local_vars[m.group('in')]
|
||||
idx = interpret_expression(m.group('idx'), local_vars,
|
||||
allow_recursion-1)
|
||||
return val[idx]
|
||||
|
||||
m = re.match(r'^(?P<a>.+?)(?P<op>[%])(?P<b>.+?)$', expr)
|
||||
if m:
|
||||
a = interpret_expression(m.group('a'),
|
||||
local_vars, allow_recursion)
|
||||
b = interpret_expression(m.group('b'),
|
||||
local_vars, allow_recursion)
|
||||
return a % b
|
||||
|
||||
m = re.match(
|
||||
r'^(?P<func>[a-zA-Z]+)\((?P<args>[a-z0-9,]+)\)$', expr)
|
||||
if m:
|
||||
fname = m.group('func')
|
||||
if fname not in functions:
|
||||
functions[fname] = extract_function(fname)
|
||||
argvals = [int(v) if v.isdigit() else local_vars[v]
|
||||
for v in m.group('args').split(',')]
|
||||
return functions[fname](argvals)
|
||||
raise ExtractorError(u'Unsupported JS expression %r' % expr)
|
||||
|
||||
def extract_function(funcname):
|
||||
func_m = re.search(
|
||||
r'function ' + re.escape(funcname) +
|
||||
r'\((?P<args>[a-z,]+)\){(?P<code>[^}]+)}',
|
||||
jscode)
|
||||
argnames = func_m.group('args').split(',')
|
||||
|
||||
def resf(args):
|
||||
local_vars = dict(zip(argnames, args))
|
||||
for stmt in func_m.group('code').split(';'):
|
||||
res = interpret_statement(stmt, local_vars)
|
||||
return res
|
||||
return resf
|
||||
|
||||
initial_function = extract_function(funcname)
|
||||
return lambda s: initial_function([s])
|
||||
|
||||
def _parse_sig_swf(self, file_contents):
|
||||
if file_contents[1:3] != b'WS':
|
||||
raise ExtractorError(
|
||||
u'Not an SWF file; header is %r' % file_contents[:3])
|
||||
if file_contents[:1] == b'C':
|
||||
content = zlib.decompress(file_contents[8:])
|
||||
else:
|
||||
raise NotImplementedError(u'Unsupported compression format %r' %
|
||||
file_contents[:1])
|
||||
|
||||
def extract_tags(content):
|
||||
pos = 0
|
||||
while pos < len(content):
|
||||
header16 = struct.unpack('<H', content[pos:pos+2])[0]
|
||||
pos += 2
|
||||
tag_code = header16 >> 6
|
||||
tag_len = header16 & 0x3f
|
||||
if tag_len == 0x3f:
|
||||
tag_len = struct.unpack('<I', content[pos:pos+4])[0]
|
||||
pos += 4
|
||||
assert pos+tag_len <= len(content)
|
||||
yield (tag_code, content[pos:pos+tag_len])
|
||||
pos += tag_len
|
||||
|
||||
code_tag = next(tag
|
||||
for tag_code, tag in extract_tags(content)
|
||||
if tag_code == 82)
|
||||
p = code_tag.index(b'\0', 4) + 1
|
||||
code_reader = io.BytesIO(code_tag[p:])
|
||||
|
||||
# Parse ABC (AVM2 ByteCode)
|
||||
def read_int(reader=None):
|
||||
if reader is None:
|
||||
reader = code_reader
|
||||
res = 0
|
||||
shift = 0
|
||||
for _ in range(5):
|
||||
buf = reader.read(1)
|
||||
assert len(buf) == 1
|
||||
b = struct.unpack('<B', buf)[0]
|
||||
res = res | ((b & 0x7f) << shift)
|
||||
if b & 0x80 == 0:
|
||||
break
|
||||
shift += 7
|
||||
return res
|
||||
|
||||
def u30(reader=None):
|
||||
res = read_int(reader)
|
||||
assert res & 0xf0000000 == 0
|
||||
return res
|
||||
u32 = read_int
|
||||
|
||||
def s32(reader=None):
|
||||
v = read_int(reader)
|
||||
if v & 0x80000000 != 0:
|
||||
v = - ((v ^ 0xffffffff) + 1)
|
||||
return v
|
||||
|
||||
def read_string(reader=None):
|
||||
if reader is None:
|
||||
reader = code_reader
|
||||
slen = u30(reader)
|
||||
resb = reader.read(slen)
|
||||
assert len(resb) == slen
|
||||
return resb.decode('utf-8')
|
||||
|
||||
def read_bytes(count, reader=None):
|
||||
if reader is None:
|
||||
reader = code_reader
|
||||
resb = reader.read(count)
|
||||
assert len(resb) == count
|
||||
return resb
|
||||
|
||||
def read_byte(reader=None):
|
||||
resb = read_bytes(1, reader=reader)
|
||||
res = struct.unpack('<B', resb)[0]
|
||||
return res
|
||||
|
||||
# minor_version + major_version
|
||||
read_bytes(2 + 2)
|
||||
|
||||
# Constant pool
|
||||
int_count = u30()
|
||||
for _c in range(1, int_count):
|
||||
s32()
|
||||
uint_count = u30()
|
||||
for _c in range(1, uint_count):
|
||||
u32()
|
||||
double_count = u30()
|
||||
read_bytes((double_count-1) * 8)
|
||||
string_count = u30()
|
||||
constant_strings = [u'']
|
||||
for _c in range(1, string_count):
|
||||
s = read_string()
|
||||
constant_strings.append(s)
|
||||
namespace_count = u30()
|
||||
for _c in range(1, namespace_count):
|
||||
read_bytes(1) # kind
|
||||
u30() # name
|
||||
ns_set_count = u30()
|
||||
for _c in range(1, ns_set_count):
|
||||
count = u30()
|
||||
for _c2 in range(count):
|
||||
u30()
|
||||
multiname_count = u30()
|
||||
MULTINAME_SIZES = {
|
||||
0x07: 2, # QName
|
||||
0x0d: 2, # QNameA
|
||||
0x0f: 1, # RTQName
|
||||
0x10: 1, # RTQNameA
|
||||
0x11: 0, # RTQNameL
|
||||
0x12: 0, # RTQNameLA
|
||||
0x09: 2, # Multiname
|
||||
0x0e: 2, # MultinameA
|
||||
0x1b: 1, # MultinameL
|
||||
0x1c: 1, # MultinameLA
|
||||
}
|
||||
multinames = [u'']
|
||||
for _c in range(1, multiname_count):
|
||||
kind = u30()
|
||||
assert kind in MULTINAME_SIZES, u'Invalid multiname kind %r' % kind
|
||||
if kind == 0x07:
|
||||
u30() # namespace_idx
|
||||
name_idx = u30()
|
||||
multinames.append(constant_strings[name_idx])
|
||||
else:
|
||||
multinames.append('[MULTINAME kind: %d]' % kind)
|
||||
for _c2 in range(MULTINAME_SIZES[kind]):
|
||||
u30()
|
||||
|
||||
# Methods
|
||||
method_count = u30()
|
||||
MethodInfo = collections.namedtuple(
|
||||
'MethodInfo',
|
||||
['NEED_ARGUMENTS', 'NEED_REST'])
|
||||
method_infos = []
|
||||
for method_id in range(method_count):
|
||||
param_count = u30()
|
||||
u30() # return type
|
||||
for _ in range(param_count):
|
||||
u30() # param type
|
||||
u30() # name index (always 0 for youtube)
|
||||
flags = read_byte()
|
||||
if flags & 0x08 != 0:
|
||||
# Options present
|
||||
option_count = u30()
|
||||
for c in range(option_count):
|
||||
u30() # val
|
||||
read_bytes(1) # kind
|
||||
if flags & 0x80 != 0:
|
||||
# Param names present
|
||||
for _ in range(param_count):
|
||||
u30() # param name
|
||||
mi = MethodInfo(flags & 0x01 != 0, flags & 0x04 != 0)
|
||||
method_infos.append(mi)
|
||||
|
||||
# Metadata
|
||||
metadata_count = u30()
|
||||
for _c in range(metadata_count):
|
||||
u30() # name
|
||||
item_count = u30()
|
||||
for _c2 in range(item_count):
|
||||
u30() # key
|
||||
u30() # value
|
||||
|
||||
def parse_traits_info():
|
||||
trait_name_idx = u30()
|
||||
kind_full = read_byte()
|
||||
kind = kind_full & 0x0f
|
||||
attrs = kind_full >> 4
|
||||
methods = {}
|
||||
if kind in [0x00, 0x06]: # Slot or Const
|
||||
u30() # Slot id
|
||||
u30() # type_name_idx
|
||||
vindex = u30()
|
||||
if vindex != 0:
|
||||
read_byte() # vkind
|
||||
elif kind in [0x01, 0x02, 0x03]: # Method / Getter / Setter
|
||||
u30() # disp_id
|
||||
method_idx = u30()
|
||||
methods[multinames[trait_name_idx]] = method_idx
|
||||
elif kind == 0x04: # Class
|
||||
u30() # slot_id
|
||||
u30() # classi
|
||||
elif kind == 0x05: # Function
|
||||
u30() # slot_id
|
||||
function_idx = u30()
|
||||
methods[function_idx] = multinames[trait_name_idx]
|
||||
else:
|
||||
raise ExtractorError(u'Unsupported trait kind %d' % kind)
|
||||
|
||||
if attrs & 0x4 != 0: # Metadata present
|
||||
metadata_count = u30()
|
||||
for _c3 in range(metadata_count):
|
||||
u30() # metadata index
|
||||
|
||||
return methods
|
||||
|
||||
# Classes
|
||||
TARGET_CLASSNAME = u'SignatureDecipher'
|
||||
searched_idx = multinames.index(TARGET_CLASSNAME)
|
||||
searched_class_id = None
|
||||
class_count = u30()
|
||||
for class_id in range(class_count):
|
||||
name_idx = u30()
|
||||
if name_idx == searched_idx:
|
||||
# We found the class we're looking for!
|
||||
searched_class_id = class_id
|
||||
u30() # super_name idx
|
||||
flags = read_byte()
|
||||
if flags & 0x08 != 0: # Protected namespace is present
|
||||
u30() # protected_ns_idx
|
||||
intrf_count = u30()
|
||||
for _c2 in range(intrf_count):
|
||||
u30()
|
||||
u30() # iinit
|
||||
trait_count = u30()
|
||||
for _c2 in range(trait_count):
|
||||
parse_traits_info()
|
||||
|
||||
if searched_class_id is None:
|
||||
raise ExtractorError(u'Target class %r not found' %
|
||||
TARGET_CLASSNAME)
|
||||
|
||||
method_names = {}
|
||||
method_idxs = {}
|
||||
for class_id in range(class_count):
|
||||
u30() # cinit
|
||||
trait_count = u30()
|
||||
for _c2 in range(trait_count):
|
||||
trait_methods = parse_traits_info()
|
||||
if class_id == searched_class_id:
|
||||
method_names.update(trait_methods.items())
|
||||
method_idxs.update(dict(
|
||||
(idx, name)
|
||||
for name, idx in trait_methods.items()))
|
||||
|
||||
# Scripts
|
||||
script_count = u30()
|
||||
for _c in range(script_count):
|
||||
u30() # init
|
||||
trait_count = u30()
|
||||
for _c2 in range(trait_count):
|
||||
parse_traits_info()
|
||||
|
||||
# Method bodies
|
||||
method_body_count = u30()
|
||||
Method = collections.namedtuple('Method', ['code', 'local_count'])
|
||||
methods = {}
|
||||
for _c in range(method_body_count):
|
||||
method_idx = u30()
|
||||
u30() # max_stack
|
||||
local_count = u30()
|
||||
u30() # init_scope_depth
|
||||
u30() # max_scope_depth
|
||||
code_length = u30()
|
||||
code = read_bytes(code_length)
|
||||
if method_idx in method_idxs:
|
||||
m = Method(code, local_count)
|
||||
methods[method_idxs[method_idx]] = m
|
||||
exception_count = u30()
|
||||
for _c2 in range(exception_count):
|
||||
u30() # from
|
||||
u30() # to
|
||||
u30() # target
|
||||
u30() # exc_type
|
||||
u30() # var_name
|
||||
trait_count = u30()
|
||||
for _c2 in range(trait_count):
|
||||
parse_traits_info()
|
||||
|
||||
assert p + code_reader.tell() == len(code_tag)
|
||||
assert len(methods) == len(method_idxs)
|
||||
|
||||
method_pyfunctions = {}
|
||||
|
||||
def extract_function(func_name):
|
||||
if func_name in method_pyfunctions:
|
||||
return method_pyfunctions[func_name]
|
||||
if func_name not in methods:
|
||||
raise ExtractorError(u'Cannot find function %r' % func_name)
|
||||
m = methods[func_name]
|
||||
|
||||
def resfunc(args):
|
||||
registers = ['(this)'] + list(args) + [None] * m.local_count
|
||||
stack = []
|
||||
coder = io.BytesIO(m.code)
|
||||
while True:
|
||||
opcode = struct.unpack('!B', coder.read(1))[0]
|
||||
if opcode == 36: # pushbyte
|
||||
v = struct.unpack('!B', coder.read(1))[0]
|
||||
stack.append(v)
|
||||
elif opcode == 44: # pushstring
|
||||
idx = u30(coder)
|
||||
stack.append(constant_strings[idx])
|
||||
elif opcode == 48: # pushscope
|
||||
# We don't implement the scope register, so we'll just
|
||||
# ignore the popped value
|
||||
stack.pop()
|
||||
elif opcode == 70: # callproperty
|
||||
index = u30(coder)
|
||||
mname = multinames[index]
|
||||
arg_count = u30(coder)
|
||||
args = list(reversed(
|
||||
[stack.pop() for _ in range(arg_count)]))
|
||||
obj = stack.pop()
|
||||
if mname == u'split':
|
||||
assert len(args) == 1
|
||||
assert isinstance(args[0], compat_str)
|
||||
assert isinstance(obj, compat_str)
|
||||
if args[0] == u'':
|
||||
res = list(obj)
|
||||
else:
|
||||
res = obj.split(args[0])
|
||||
stack.append(res)
|
||||
elif mname == u'slice':
|
||||
assert len(args) == 1
|
||||
assert isinstance(args[0], int)
|
||||
assert isinstance(obj, list)
|
||||
res = obj[args[0]:]
|
||||
stack.append(res)
|
||||
elif mname == u'join':
|
||||
assert len(args) == 1
|
||||
assert isinstance(args[0], compat_str)
|
||||
assert isinstance(obj, list)
|
||||
res = args[0].join(obj)
|
||||
stack.append(res)
|
||||
elif mname in method_pyfunctions:
|
||||
stack.append(method_pyfunctions[mname](args))
|
||||
else:
|
||||
raise NotImplementedError(
|
||||
u'Unsupported property %r on %r'
|
||||
% (mname, obj))
|
||||
elif opcode == 72: # returnvalue
|
||||
res = stack.pop()
|
||||
return res
|
||||
elif opcode == 79: # callpropvoid
|
||||
index = u30(coder)
|
||||
mname = multinames[index]
|
||||
arg_count = u30(coder)
|
||||
args = list(reversed(
|
||||
[stack.pop() for _ in range(arg_count)]))
|
||||
obj = stack.pop()
|
||||
if mname == u'reverse':
|
||||
assert isinstance(obj, list)
|
||||
obj.reverse()
|
||||
else:
|
||||
raise NotImplementedError(
|
||||
u'Unsupported (void) property %r on %r'
|
||||
% (mname, obj))
|
||||
elif opcode == 93: # findpropstrict
|
||||
index = u30(coder)
|
||||
mname = multinames[index]
|
||||
res = extract_function(mname)
|
||||
stack.append(res)
|
||||
elif opcode == 97: # setproperty
|
||||
index = u30(coder)
|
||||
value = stack.pop()
|
||||
idx = stack.pop()
|
||||
obj = stack.pop()
|
||||
assert isinstance(obj, list)
|
||||
assert isinstance(idx, int)
|
||||
obj[idx] = value
|
||||
elif opcode == 98: # getlocal
|
||||
index = u30(coder)
|
||||
stack.append(registers[index])
|
||||
elif opcode == 99: # setlocal
|
||||
index = u30(coder)
|
||||
value = stack.pop()
|
||||
registers[index] = value
|
||||
elif opcode == 102: # getproperty
|
||||
index = u30(coder)
|
||||
pname = multinames[index]
|
||||
if pname == u'length':
|
||||
obj = stack.pop()
|
||||
assert isinstance(obj, list)
|
||||
stack.append(len(obj))
|
||||
else: # Assume attribute access
|
||||
idx = stack.pop()
|
||||
assert isinstance(idx, int)
|
||||
obj = stack.pop()
|
||||
assert isinstance(obj, list)
|
||||
stack.append(obj[idx])
|
||||
elif opcode == 128: # coerce
|
||||
u30(coder)
|
||||
elif opcode == 133: # coerce_s
|
||||
assert isinstance(stack[-1], (type(None), compat_str))
|
||||
elif opcode == 164: # modulo
|
||||
value2 = stack.pop()
|
||||
value1 = stack.pop()
|
||||
res = value1 % value2
|
||||
stack.append(res)
|
||||
elif opcode == 208: # getlocal_0
|
||||
stack.append(registers[0])
|
||||
elif opcode == 209: # getlocal_1
|
||||
stack.append(registers[1])
|
||||
elif opcode == 210: # getlocal_2
|
||||
stack.append(registers[2])
|
||||
elif opcode == 211: # getlocal_3
|
||||
stack.append(registers[3])
|
||||
elif opcode == 214: # setlocal_2
|
||||
registers[2] = stack.pop()
|
||||
elif opcode == 215: # setlocal_3
|
||||
registers[3] = stack.pop()
|
||||
else:
|
||||
raise NotImplementedError(
|
||||
u'Unsupported opcode %d' % opcode)
|
||||
|
||||
method_pyfunctions[func_name] = resfunc
|
||||
return resfunc
|
||||
|
||||
initial_function = extract_function(u'decipher')
|
||||
return lambda s: initial_function([s])
|
||||
|
||||
def _decrypt_signature(self, s, video_id, player_url, age_gate=False):
|
||||
"""Turn the encrypted s field into a working signature"""
|
||||
|
||||
if player_url is not None:
|
||||
try:
|
||||
if player_url not in self._player_cache:
|
||||
func = self._extract_signature_function(
|
||||
video_id, player_url, len(s)
|
||||
)
|
||||
self._player_cache[player_url] = func
|
||||
func = self._player_cache[player_url]
|
||||
if self._downloader.params.get('youtube_print_sig_code'):
|
||||
self._print_sig_code(func, len(s))
|
||||
return func(s)
|
||||
except Exception:
|
||||
tb = traceback.format_exc()
|
||||
self._downloader.report_warning(
|
||||
u'Automatic signature extraction failed: ' + tb)
|
||||
|
||||
self._downloader.report_warning(
|
||||
u'Warning: Falling back to static signature algorithm')
|
||||
return self._static_decrypt_signature(
|
||||
s, video_id, player_url, age_gate)
|
||||
|
||||
def _static_decrypt_signature(self, s, video_id, player_url, age_gate):
|
||||
if age_gate:
|
||||
# The videos with age protection use another player, so the
|
||||
# algorithms can be different.
|
||||
if len(s) == 86:
|
||||
return s[2:63] + s[82] + s[64:82] + s[63]
|
||||
|
||||
if len(s) == 93:
|
||||
return s[86:29:-1] + s[88] + s[28:5:-1]
|
||||
elif len(s) == 92:
|
||||
@@ -431,7 +1092,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
|
||||
elif len(s) == 87:
|
||||
return s[6:27] + s[4] + s[28:39] + s[27] + s[40:59] + s[2] + s[60:]
|
||||
elif len(s) == 86:
|
||||
return s[80:72:-1] + s[16] + s[71:39:-1] + s[72] + s[38:16:-1] + s[82] + s[:16][::-1]
|
||||
return s[80:72:-1] + s[16] + s[71:39:-1] + s[72] + s[38:16:-1] + s[82] + s[15::-1]
|
||||
elif len(s) == 85:
|
||||
return s[3:11] + s[0] + s[12:55] + s[84] + s[56:84]
|
||||
elif len(s) == 84:
|
||||
@@ -450,15 +1111,6 @@ class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
|
||||
else:
|
||||
raise ExtractorError(u'Unable to decrypt signature, key length %d not supported; retrying might work' % (len(s)))
|
||||
|
||||
def _decrypt_signature_age_gate(self, s):
|
||||
# The videos with age protection use another player, so the algorithms
|
||||
# can be different.
|
||||
if len(s) == 86:
|
||||
return s[2:63] + s[82] + s[64:82] + s[63]
|
||||
else:
|
||||
# Fallback to the other algortihms
|
||||
return self._decrypt_signature(s)
|
||||
|
||||
def _get_available_subtitles(self, video_id):
|
||||
try:
|
||||
sub_list = self._download_webpage(
|
||||
@@ -631,7 +1283,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
|
||||
video_webpage = video_webpage_bytes.decode('utf-8', 'ignore')
|
||||
|
||||
# Attempt to extract SWF player URL
|
||||
mobj = re.search(r'swfConfig.*?"(http:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
|
||||
mobj = re.search(r'swfConfig.*?"(https?:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
|
||||
if mobj is not None:
|
||||
player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))
|
||||
else:
|
||||
@@ -784,21 +1436,34 @@ class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
|
||||
if 'sig' in url_data:
|
||||
url += '&signature=' + url_data['sig'][0]
|
||||
elif 's' in url_data:
|
||||
if self._downloader.params.get('verbose'):
|
||||
s = url_data['s'][0]
|
||||
if age_gate:
|
||||
player = 'flash player'
|
||||
else:
|
||||
player = u'html5 player %s' % self._search_regex(r'html5player-(.+?)\.js', video_webpage,
|
||||
'html5 player', fatal=False)
|
||||
parts_sizes = u'.'.join(compat_str(len(part)) for part in s.split('.'))
|
||||
self.to_screen(u'encrypted signature length %d (%s), itag %s, %s' %
|
||||
(len(s), parts_sizes, url_data['itag'][0], player))
|
||||
encrypted_sig = url_data['s'][0]
|
||||
if self._downloader.params.get('verbose'):
|
||||
if age_gate:
|
||||
signature = self._decrypt_signature_age_gate(encrypted_sig)
|
||||
if player_url is None:
|
||||
player_version = 'unknown'
|
||||
else:
|
||||
signature = self._decrypt_signature(encrypted_sig)
|
||||
player_version = self._search_regex(
|
||||
r'-(.+)\.swf$', player_url,
|
||||
u'flash player', fatal=False)
|
||||
player_desc = 'flash player %s' % player_version
|
||||
else:
|
||||
player_version = self._search_regex(
|
||||
r'html5player-(.+?)\.js', video_webpage,
|
||||
'html5 player', fatal=False)
|
||||
player_desc = u'html5 player %s' % player_version
|
||||
|
||||
parts_sizes = u'.'.join(compat_str(len(part)) for part in encrypted_sig.split('.'))
|
||||
self.to_screen(u'encrypted signature length %d (%s), itag %s, %s' %
|
||||
(len(encrypted_sig), parts_sizes, url_data['itag'][0], player_desc))
|
||||
|
||||
if not age_gate:
|
||||
jsplayer_url_json = self._search_regex(
|
||||
r'"assets":.+?"js":\s*("[^"]+")',
|
||||
video_webpage, u'JS player URL')
|
||||
player_url = json.loads(jsplayer_url_json)
|
||||
|
||||
signature = self._decrypt_signature(
|
||||
encrypted_sig, video_id, player_url, age_gate)
|
||||
url += '&signature=' + signature
|
||||
if 'ratebypass' not in url:
|
||||
url += '&ratebypass=yes'
|
||||
|
||||
@@ -66,6 +66,12 @@ try:
|
||||
except ImportError: # Python 2
|
||||
from urllib2 import HTTPError as compat_HTTPError
|
||||
|
||||
try:
|
||||
from urllib.request import urlretrieve as compat_urlretrieve
|
||||
except ImportError: # Python 2
|
||||
from urllib import urlretrieve as compat_urlretrieve
|
||||
|
||||
|
||||
try:
|
||||
from subprocess import DEVNULL
|
||||
compat_subprocess_get_DEVNULL = lambda: DEVNULL
|
||||
|
||||
Reference in New Issue
Block a user