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[youtube] decrypt signature when downloading dash manifest

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This commit is contained in:
m0viefreak 2014-02-20 18:19:03 +01:00
parent eae16eb67b
commit d68f0cdb23
1 changed files with 18 additions and 4 deletions
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22
youtube_dl/extractor/youtube.py
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@ -1366,12 +1366,26 @@ def _map_to_format_list(urlmap):
raise ExtractorError(u'no conn, hlsvp or url_encoded_fmt_stream_map information found in video info')
# Look for the DASH manifest
dash_manifest_url_lst = video_info.get('dashmpd')
if (dash_manifest_url_lst and dash_manifest_url_lst[0] and
self._downloader.params.get('youtube_include_dash_manifest', False)):
if (self._downloader.params.get('youtube_include_dash_manifest', False)):
try:
# The DASH manifest used needs to be the one from the original video_webpage.
# The one found in get_video_info seems to be using different signatures.
# However, in the case of an age restriction there won't be any embedded dashmpd in the video_webpage.
# Luckily, it seems, this case uses some kind of default signature (len == 86), so the
# combination of get_video_info and the _static_decrypt_signature() decryption fallback will work here.
if age_gate:
dash_manifest_url = video_info.get('dashmpd')[0];
else:
x = re.search(r'ytplayer\.config = ({.*});', video_webpage)
x = json.loads(x.group(1));
dash_manifest_url = x['args']['dashmpd']
def decrypt_sig(mobj):
s = mobj.group(1)
dec_s = self._decrypt_signature(s, video_id, player_url, age_gate)
return '/signature/%s' % dec_s
dash_manifest_url = re.sub(r'/s/([\w\.]+)', decrypt_sig, dash_manifest_url)
dash_doc = self._download_xml(
dash_manifest_url_lst[0], video_id,
dash_manifest_url, video_id,
note=u'Downloading DASH manifest',
errnote=u'Could not download DASH manifest')
for r in dash_doc.findall(u'.//{urn:mpeg:DASH:schema:MPD:2011}Representation'):