[mixcloud] Fix extraction (closes #14088)
This commit is contained in:
Tatsuyuki Ishi
Sergey M․
parent
8c2895305d
commit
2384f5a64e
@ -6,6 +6,7 @@ import collections
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import email
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import getpass
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import io
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import itertools
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import optparse
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import os
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import re
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@ -15,7 +16,6 @@ import socket
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import struct
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import subprocess
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import sys
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import itertools
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import xml.etree.ElementTree
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@ -2898,6 +2898,13 @@ else:
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compat_struct_pack = struct.pack
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compat_struct_unpack = struct.unpack
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try:
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from future_builtins import zip as compat_zip
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except ImportError: # not 2.6+ or is 3.x
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try:
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from itertools import izip as compat_zip # < 2.5 or 3.x
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except ImportError:
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compat_zip = zip
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__all__ = [
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'compat_HTMLParseError',
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@ -2948,5 +2955,6 @@ __all__ = [
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'compat_urlretrieve',
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'compat_xml_parse_error',
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'compat_xpath',
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'compat_zip',
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'workaround_optparse_bug9161',
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]
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@ -9,16 +9,16 @@ from .common import InfoExtractor
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from ..compat import (
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compat_chr,
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compat_ord,
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compat_str,
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compat_urllib_parse_unquote,
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compat_urlparse,
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compat_zip
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)
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from ..utils import (
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clean_html,
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ExtractorError,
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OnDemandPagedList,
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str_to_int,
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)
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try_get)
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class MixcloudIE(InfoExtractor):
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@ -54,27 +54,19 @@ class MixcloudIE(InfoExtractor):
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'only_matching': True,
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}]
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_keys = [
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'return { requestAnimationFrame: function(callback) { callback(); }, innerHeight: 500 };',
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'pleasedontdownloadourmusictheartistswontgetpaid',
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'window.addEventListener = window.addEventListener || function() {};',
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'(function() { return new Date().toLocaleDateString(); })()'
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]
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_current_key = None
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@staticmethod
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def _decrypt_xor_cipher(key, ciphertext):
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"""Encrypt/Decrypt XOR cipher. Both ways are possible because it's XOR."""
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return ''.join([
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compat_chr(compat_ord(ch) ^ compat_ord(k))
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for ch, k in compat_zip(ciphertext, itertools.cycle(key))])
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# See https://www.mixcloud.com/media/js2/www_js_2.9e23256562c080482435196ca3975ab5.js
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def _decrypt_play_info(self, play_info, video_id):
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play_info = base64.b64decode(play_info.encode('ascii'))
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for num, key in enumerate(self._keys, start=1):
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try:
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return self._parse_json(
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''.join([
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compat_chr(compat_ord(ch) ^ compat_ord(key[idx % len(key)]))
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for idx, ch in enumerate(play_info)]),
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video_id)
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except ExtractorError:
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if num == len(self._keys):
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raise
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@staticmethod
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def _decrypt_and_extend(stream_info, url_key, getter, key, formats):
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maybe_url = stream_info.get(url_key)
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if maybe_url is not None:
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decrypted = MixcloudIE._decrypt_xor_cipher(key, base64.b64decode(maybe_url))
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formats.extend(getter(decrypted))
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def _real_extract(self, url):
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mobj = re.match(self._VALID_URL, url)
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@ -84,35 +76,66 @@ class MixcloudIE(InfoExtractor):
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webpage = self._download_webpage(url, track_id)
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if not self._current_key:
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js_url = self._search_regex(
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r'<script[^>]+\bsrc=["\"](https://(?:www\.)?mixcloud\.com/media/js2/www_js_4\.[^>]+\.js)',
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webpage, 'js url', default=None)
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if js_url:
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js = self._download_webpage(js_url, track_id, fatal=False)
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if js:
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KEY_RE_TEMPLATE = r'player\s*:\s*{.*?\b%s\s*:\s*(["\'])(?P<key>(?:(?!\1).)+)\1'
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for key_name in ('value', 'key_value', 'key_value.*?', '.*?value.*?'):
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key = self._search_regex(
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KEY_RE_TEMPLATE % key_name, js, 'key',
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default=None, group='key')
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if key and isinstance(key, compat_str):
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self._keys.insert(0, key)
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self._current_key = key
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# Legacy path
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encrypted_play_info = self._search_regex(
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r'm-play-info="([^"]+)"', webpage, 'play info', default=None)
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if encrypted_play_info is not None:
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# Decode
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encrypted_play_info = base64.b64decode(encrypted_play_info)
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else:
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# New path
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full_info_json = self._parse_json(self._html_search_regex(
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r'<script id="relay-data" type="text/x-mixcloud">([^<]+)</script>', webpage, 'play info'), 'play info')
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for item in full_info_json:
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item_data = try_get(item, lambda x: x['cloudcast']['data']['cloudcastLookup'])
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if try_get(item_data, lambda x: x['streamInfo']['url']):
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info_json = item_data
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break
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else:
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raise ExtractorError('Failed to extract matching stream info')
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message = self._html_search_regex(
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r'(?s)<div[^>]+class="global-message cloudcast-disabled-notice-light"[^>]*>(.+?)<(?:a|/div)',
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webpage, 'error message', default=None)
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encrypted_play_info = self._search_regex(
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r'm-play-info="([^"]+)"', webpage, 'play info')
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play_info = self._decrypt_play_info(encrypted_play_info, track_id)
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js_url = self._search_regex(
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r'<script[^>]+\bsrc=["\"](https://(?:www\.)?mixcloud\.com/media/js2/www_js_4\.[^>]+\.js)',
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webpage, 'js url', default=None)
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if js_url is None:
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js_url = self._search_regex(
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r'<script[^>]+\bsrc=["\"](https://(?:www\.)?mixcloud\.com/media/js/www\.[^>]+\.js)',
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webpage, 'js url')
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js = self._download_webpage(js_url, track_id)
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# Known plaintext attack
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if encrypted_play_info:
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kps = ['{"stream_url":']
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kpa_target = encrypted_play_info
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else:
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kps = ['https://', 'http://']
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kpa_target = base64.b64decode(info_json['streamInfo']['url'])
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for kp in kps:
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partial_key = self._decrypt_xor_cipher(kpa_target, kp)
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for quote in ["'", '"']:
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key = self._search_regex(r'{0}({1}[^{0}]*){0}'.format(quote, re.escape(partial_key)), js,
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"encryption key", default=None)
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if key is not None:
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break
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else:
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continue
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break
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else:
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raise ExtractorError('Failed to extract encryption key')
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if encrypted_play_info is not None:
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play_info = self._parse_json(self._decrypt_xor_cipher(key, encrypted_play_info), 'play info')
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if message and 'stream_url' not in play_info:
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raise ExtractorError('%s said: %s' % (self.IE_NAME, message), expected=True)
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song_url = play_info['stream_url']
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formats = [{
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'format_id': 'normal',
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'url': song_url
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}]
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title = self._html_search_regex(r'm-title="([^"]+)"', webpage, 'title')
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thumbnail = self._proto_relative_url(self._html_search_regex(
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@ -128,10 +151,30 @@ class MixcloudIE(InfoExtractor):
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r'(?:m|data)-tooltip=["\']([\d,.]+) plays'],
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webpage, 'play count', default=None))
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else:
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title = info_json['name']
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thumbnail = try_get(info_json,
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lambda x: 'https://thumbnailer.mixcloud.com/unsafe/600x600/' + x['picture']['urlRoot'])
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uploader = try_get(info_json, lambda x: x['owner']['displayName'])
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uploader_id = try_get(info_json, lambda x: x['owner']['username'])
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description = try_get(info_json, lambda x: x['description'])
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view_count = try_get(info_json, lambda x: x['plays'])
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stream_info = info_json['streamInfo']
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formats = []
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self._decrypt_and_extend(stream_info, 'url', lambda x: [{
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'format_id': 'normal',
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'url': x
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}], key, formats)
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self._decrypt_and_extend(stream_info, 'hlsUrl', lambda x: self._extract_m3u8_formats(x, title), key,
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formats)
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self._decrypt_and_extend(stream_info, 'dashUrl', lambda x: self._extract_mpd_formats(x, title), key,
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formats)
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return {
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'id': track_id,
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'title': title,
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'url': song_url,
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'formats': formats,
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'description': description,
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'thumbnail': thumbnail,
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'uploader': uploader,
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