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[mixcloud] Fix extraction (closes #14088)

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pull/2/head
Tatsuyuki Ishi 7 years ago committed by Sergey M․
parent 8c2895305d
commit 2384f5a64e
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GPG Key ID: 2C393E0F18A9236D
2 changed files with 114 additions and 63 deletions
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10
youtube_dl/compat.py
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@ -6,6 +6,7 @@ import collections
import email
import getpass
import io
import itertools
import optparse
import os
import re
@ -15,7 +16,6 @@ import socket
import struct
import subprocess
import sys
import itertools
import xml.etree.ElementTree
@ -2898,6 +2898,13 @@ else:
compat_struct_pack = struct.pack
compat_struct_unpack = struct.unpack
try:
from future_builtins import zip as compat_zip
except ImportError: # not 2.6+ or is 3.x
try:
from itertools import izip as compat_zip # < 2.5 or 3.x
except ImportError:
compat_zip = zip
__all__ = [
'compat_HTMLParseError',
@ -2948,5 +2955,6 @@ __all__ = [
'compat_urlretrieve',
'compat_xml_parse_error',
'compat_xpath',
'compat_zip',
'workaround_optparse_bug9161',
]

167
youtube_dl/extractor/mixcloud.py
Unescape Escape View File

@ -9,16 +9,16 @@ from .common import InfoExtractor
from ..compat import (
compat_chr,
compat_ord,
compat_str,
compat_urllib_parse_unquote,
compat_urlparse,
compat_zip
)
from ..utils import (
clean_html,
ExtractorError,
OnDemandPagedList,
str_to_int,
)
try_get)
class MixcloudIE(InfoExtractor):
@ -54,27 +54,19 @@ class MixcloudIE(InfoExtractor):
'only_matching': True,
}]
_keys = [
'return { requestAnimationFrame: function(callback) { callback(); }, innerHeight: 500 };',
'pleasedontdownloadourmusictheartistswontgetpaid',
'window.addEventListener = window.addEventListener || function() {};',
'(function() { return new Date().toLocaleDateString(); })()'
]
_current_key = None
# See https://www.mixcloud.com/media/js2/www_js_2.9e23256562c080482435196ca3975ab5.js
def _decrypt_play_info(self, play_info, video_id):
play_info = base64.b64decode(play_info.encode('ascii'))
for num, key in enumerate(self._keys, start=1):
try:
return self._parse_json(
''.join([
compat_chr(compat_ord(ch) ^ compat_ord(key[idx % len(key)]))
for idx, ch in enumerate(play_info)]),
video_id)
except ExtractorError:
if num == len(self._keys):
raise
@staticmethod
def _decrypt_xor_cipher(key, ciphertext):
"""Encrypt/Decrypt XOR cipher. Both ways are possible because it's XOR."""
return ''.join([
compat_chr(compat_ord(ch) ^ compat_ord(k))
for ch, k in compat_zip(ciphertext, itertools.cycle(key))])
@staticmethod
def _decrypt_and_extend(stream_info, url_key, getter, key, formats):
maybe_url = stream_info.get(url_key)
if maybe_url is not None:
decrypted = MixcloudIE._decrypt_xor_cipher(key, base64.b64decode(maybe_url))
formats.extend(getter(decrypted))
def _real_extract(self, url):
mobj = re.match(self._VALID_URL, url)
@ -84,54 +76,105 @@ class MixcloudIE(InfoExtractor):
webpage = self._download_webpage(url, track_id)
if not self._current_key:
js_url = self._search_regex(
r'<script[^>]+\bsrc=["\"](https://(?:www\.)?mixcloud\.com/media/js2/www_js_4\.[^>]+\.js)',
webpage, 'js url', default=None)
if js_url:
js = self._download_webpage(js_url, track_id, fatal=False)
if js:
KEY_RE_TEMPLATE = r'player\s*:\s*{.*?\b%s\s*:\s*(["\'])(?P<key>(?:(?!\1).)+)\1'
for key_name in ('value', 'key_value', 'key_value.*?', '.*?value.*?'):
key = self._search_regex(
KEY_RE_TEMPLATE % key_name, js, 'key',
default=None, group='key')
if key and isinstance(key, compat_str):
self._keys.insert(0, key)
self._current_key = key
# Legacy path
encrypted_play_info = self._search_regex(
r'm-play-info="([^"]+)"', webpage, 'play info', default=None)
if encrypted_play_info is not None:
# Decode
encrypted_play_info = base64.b64decode(encrypted_play_info)
else:
# New path
full_info_json = self._parse_json(self._html_search_regex(
r'<script id="relay-data" type="text/x-mixcloud">([^<]+)</script>', webpage, 'play info'), 'play info')
for item in full_info_json:
item_data = try_get(item, lambda x: x['cloudcast']['data']['cloudcastLookup'])
if try_get(item_data, lambda x: x['streamInfo']['url']):
info_json = item_data
break
else:
raise ExtractorError('Failed to extract matching stream info')
message = self._html_search_regex(
r'(?s)<div[^>]+class="global-message cloudcast-disabled-notice-light"[^>]*>(.+?)<(?:a|/div)',
webpage, 'error message', default=None)
encrypted_play_info = self._search_regex(
r'm-play-info="([^"]+)"', webpage, 'play info')
play_info = self._decrypt_play_info(encrypted_play_info, track_id)
if message and 'stream_url' not in play_info:
raise ExtractorError('%s said: %s' % (self.IE_NAME, message), expected=True)
song_url = play_info['stream_url']
title = self._html_search_regex(r'm-title="([^"]+)"', webpage, 'title')
thumbnail = self._proto_relative_url(self._html_search_regex(
r'm-thumbnail-url="([^"]+)"', webpage, 'thumbnail', fatal=False))
uploader = self._html_search_regex(
r'm-owner-name="([^"]+)"', webpage, 'uploader', fatal=False)
uploader_id = self._search_regex(
r'\s+"profile": "([^"]+)",', webpage, 'uploader id', fatal=False)
description = self._og_search_description(webpage)
view_count = str_to_int(self._search_regex(
[r'<meta itemprop="interactionCount" content="UserPlays:([0-9]+)"',
r'/listeners/?">([0-9,.]+)</a>',
r'(?:m|data)-tooltip=["\']([\d,.]+) plays'],
webpage, 'play count', default=None))
js_url = self._search_regex(
r'<script[^>]+\bsrc=["\"](https://(?:www\.)?mixcloud\.com/media/js2/www_js_4\.[^>]+\.js)',
webpage, 'js url', default=None)
if js_url is None:
js_url = self._search_regex(
r'<script[^>]+\bsrc=["\"](https://(?:www\.)?mixcloud\.com/media/js/www\.[^>]+\.js)',
webpage, 'js url')
js = self._download_webpage(js_url, track_id)
# Known plaintext attack
if encrypted_play_info:
kps = ['{"stream_url":']
kpa_target = encrypted_play_info
else:
kps = ['https://', 'http://']
kpa_target = base64.b64decode(info_json['streamInfo']['url'])
for kp in kps:
partial_key = self._decrypt_xor_cipher(kpa_target, kp)
for quote in ["'", '"']:
key = self._search_regex(r'{0}({1}[^{0}]*){0}'.format(quote, re.escape(partial_key)), js,
"encryption key", default=None)
if key is not None:
break
else:
continue
break
else:
raise ExtractorError('Failed to extract encryption key')
if encrypted_play_info is not None:
play_info = self._parse_json(self._decrypt_xor_cipher(key, encrypted_play_info), 'play info')
if message and 'stream_url' not in play_info:
raise ExtractorError('%s said: %s' % (self.IE_NAME, message), expected=True)
song_url = play_info['stream_url']
formats = [{
'format_id': 'normal',
'url': song_url
}]
title = self._html_search_regex(r'm-title="([^"]+)"', webpage, 'title')
thumbnail = self._proto_relative_url(self._html_search_regex(
r'm-thumbnail-url="([^"]+)"', webpage, 'thumbnail', fatal=False))
uploader = self._html_search_regex(
r'm-owner-name="([^"]+)"', webpage, 'uploader', fatal=False)
uploader_id = self._search_regex(
r'\s+"profile": "([^"]+)",', webpage, 'uploader id', fatal=False)
description = self._og_search_description(webpage)
view_count = str_to_int(self._search_regex(
[r'<meta itemprop="interactionCount" content="UserPlays:([0-9]+)"',
r'/listeners/?">([0-9,.]+)</a>',
r'(?:m|data)-tooltip=["\']([\d,.]+) plays'],
webpage, 'play count', default=None))
else:
title = info_json['name']
thumbnail = try_get(info_json,
lambda x: 'https://thumbnailer.mixcloud.com/unsafe/600x600/' + x['picture']['urlRoot'])
uploader = try_get(info_json, lambda x: x['owner']['displayName'])
uploader_id = try_get(info_json, lambda x: x['owner']['username'])
description = try_get(info_json, lambda x: x['description'])
view_count = try_get(info_json, lambda x: x['plays'])
stream_info = info_json['streamInfo']
formats = []
self._decrypt_and_extend(stream_info, 'url', lambda x: [{
'format_id': 'normal',
'url': x
}], key, formats)
self._decrypt_and_extend(stream_info, 'hlsUrl', lambda x: self._extract_m3u8_formats(x, title), key,
formats)
self._decrypt_and_extend(stream_info, 'dashUrl', lambda x: self._extract_mpd_formats(x, title), key,
formats)
return {
'id': track_id,
'title': title,
'url': song_url,
'formats': formats,
'description': description,
'thumbnail': thumbnail,
'uploader': uploader,

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