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Code Issues Releases Wiki Activity

[videa] improve extraction

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This commit is contained in:
Remita Amine 2020-11-26 12:56:49 +01:00
parent a3cf22e590
commit f9f9699f2f
1 changed files with 50 additions and 41 deletions
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91
youtube_dl/extractor/videa.py
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@ -1,10 +1,9 @@
# coding: utf-8
from __future__ import unicode_literals
import re
import random
import re
import string
import struct
from .common import InfoExtractor
from ..utils import (
@ -12,13 +11,14 @@ from ..utils import (
int_or_none,
mimetype2ext,
parse_codecs,
update_url_query,
xpath_element,
xpath_text,
)
from ..compat import (
compat_b64decode,
compat_ord,
compat_parse_qs,
compat_struct_pack,
)
@ -28,7 +28,7 @@ class VideaIE(InfoExtractor):
videa(?:kid)?\.hu/
(?:
videok/(?:[^/]+/)*[^?#&]+-|
player\?.*?\bv=|
(?:videojs_)?player\?.*?\bv=|
player/v/
)
(?P<id>[^?#&]+)
@ -62,6 +62,7 @@ class VideaIE(InfoExtractor):
'url': 'https://videakid.hu/player/v/8YfIAjxwWGwT8HVQ?autoplay=1',
'only_matching': True,
}]
_STATIC_SECRET = 'xHb0ZvME5q8CBcoQi6AngerDu3FGO9fkUlwPmLVY_RTzj2hJIS4NasXWKy1td7p'
@staticmethod
def _extract_urls(webpage):
@ -69,75 +70,84 @@ class VideaIE(InfoExtractor):
r'<iframe[^>]+src=(["\'])(?P<url>(?:https?:)?//videa\.hu/player\?.*?\bv=.+?)\1',
webpage)]
def rc4(self, ciphertext, key):
@staticmethod
def rc4(cipher_text, key):
res = b''
keyLen = len(key)
key_len = len(key)
S = list(range(256))
j = 0
for i in range(256):
j = (j + S[i] + ord(key[i % keyLen])) % 256
j = (j + S[i] + ord(key[i % key_len])) % 256
S[i], S[j] = S[j], S[i]
i = 0
j = 0
for m in range(len(ciphertext)):
for m in range(len(cipher_text)):
i = (i + 1) % 256
j = (j + S[i]) % 256
S[i], S[j] = S[j], S[i]
k = S[(S[i] + S[j]) % 256]
res += struct.pack("B", k ^ compat_ord(ciphertext[m]))
res += compat_struct_pack('B', k ^ compat_ord(cipher_text[m]))
return res
return res.decode()
def _real_extract(self, url):
video_id = self._match_id(url)
webpage = self._download_webpage(url, video_id, fatal=True)
error = self._search_regex(r'<p class="error-text">([^<]+)</p>', webpage, 'error', default=None)
if error:
raise ExtractorError(error, expected=True)
query = {'v': video_id}
player_page = self._download_webpage(
'https://videa.hu/player', video_id, query=query)
video_src_params_raw = self._search_regex(r'<iframe[^>]+id="videa_player_iframe"[^>]+src="/player\?([^"]+)"', webpage, 'video_src_params')
video_src_params = compat_parse_qs(video_src_params_raw)
player_page = self._download_webpage("https://videa.hu/videojs_player?%s" % video_src_params_raw, video_id, fatal=True)
nonce = self._search_regex(r'_xt\s*=\s*"([^"]+)"', player_page, 'nonce')
random_seed = ''.join(random.choice(string.ascii_uppercase + string.ascii_lowercase + string.digits) for _ in range(8))
static_secret = 'xHb0ZvME5q8CBcoQi6AngerDu3FGO9fkUlwPmLVY_RTzj2hJIS4NasXWKy1td7p'
nonce = self._search_regex(
r'_xt\s*=\s*"([^"]+)"', player_page, 'nonce')
l = nonce[:32]
s = nonce[32:]
result = ''
for i in range(0, 32):
result += s[i - (static_secret.index(l[i]) - 31)]
result += s[i - (self._STATIC_SECRET.index(l[i]) - 31)]
video_src_params['_s'] = random_seed
video_src_params['_t'] = result[:16]
encryption_key_stem = result[16:] + random_seed
random_seed = ''.join(random.choice(string.ascii_letters + string.digits) for _ in range(8))
query['_s'] = random_seed
query['_t'] = result[:16]
[b64_info, handle] = self._download_webpage_handle(
'http://videa.hu/videaplayer_get_xml.php', video_id,
query=video_src_params, fatal=True)
b64_info, handle = self._download_webpage_handle(
'http://videa.hu/videaplayer_get_xml.php', video_id, query=query)
if b64_info.startswith('<?xml'):
info = self._parse_xml(b64_info, video_id)
else:
key = result[16:] + random_seed + handle.headers['x-videa-xs']
info = self._parse_xml(self.rc4(
compat_b64decode(b64_info), key), video_id)
encrypted_info = compat_b64decode(b64_info)
key = encryption_key_stem + handle.info()['x-videa-xs']
info_str = self.rc4(encrypted_info, key).decode('utf8')
info = self._parse_xml(info_str, video_id)
video = xpath_element(info, './/video', 'video', fatal=True)
sources = xpath_element(info, './/video_sources', 'sources', fatal=True)
hash_values = xpath_element(info, './/hash_values', 'hash_values', fatal=True)
video = xpath_element(info, './video', 'video')
if not video:
raise ExtractorError(xpath_element(
info, './error', fatal=True), expected=True)
sources = xpath_element(
info, './video_sources', 'sources', fatal=True)
hash_values = xpath_element(
info, './hash_values', 'hash values', fatal=True)
title = xpath_text(video, './title', fatal=True)
formats = []
for source in sources.findall('./video_source'):
source_url = source.text
if not source_url:
source_name = source.get('name')
source_exp = source.get('exp')
if not (source_url and source_name and source_exp):
continue
source_url += '?md5=%s&expires=%s' % (hash_values.find('hash_value_%s' % source.get('name')).text, source.get('exp'))
hash_value = xpath_text(hash_values, 'hash_value_' + source_name)
if not hash_value:
continue
source_url = update_url_query(source_url, {
'md5': hash_value,
'expires': source_exp,
})
f = parse_codecs(source.get('codecs'))
f.update({
'url': source_url,
'url': self._proto_relative_url(source_url),
'ext': mimetype2ext(source.get('mimetype')) or 'mp4',
'format_id': source.get('name'),
'width': int_or_none(source.get('width')),
@ -146,8 +156,7 @@ class VideaIE(InfoExtractor):
formats.append(f)
self._sort_formats(formats)
thumbnail = xpath_text(video, './poster_src')
duration = int_or_none(xpath_text(video, './duration'))
thumbnail = self._proto_relative_url(xpath_text(video, './poster_src'))
age_limit = None
is_adult = xpath_text(video, './is_adult_content', default=None)
@ -158,7 +167,7 @@ class VideaIE(InfoExtractor):
'id': video_id,
'title': title,
'thumbnail': thumbnail,
'duration': duration,
'duration': int_or_none(xpath_text(video, './duration')),
'age_limit': age_limit,
'formats': formats,
}