340 lines
13 KiB
Python
340 lines
13 KiB
Python
# -*- coding: utf-8 -*-
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#
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# gPodder - A media aggregator and podcast client
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# Copyright (c) 2005-2018 The gPodder Team
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#
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# gPodder is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# gPodder is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# gpodder.youtube - YouTube and related magic
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# Justin Forest <justin.forest@gmail.com> 2008-10-13
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#
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import json
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import logging
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import re
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import urllib
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import xml.etree.ElementTree
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from html.parser import HTMLParser
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from urllib.parse import parse_qs
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from gpodder import util
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logger = logging.getLogger(__name__)
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# http://en.wikipedia.org/wiki/YouTube#Quality_and_codecs
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# format id, (preferred ids, path(?), description) # video bitrate, audio bitrate
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formats = [
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# WebM VP8 video, Vorbis audio
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# Fallback to an MP4 version of same quality.
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# Try 34 (FLV 360p H.264 AAC) if 18 (MP4 360p) fails.
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# Fallback to 6 or 5 (FLV Sorenson H.263 MP3) if all fails.
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(46, ([46, 37, 45, 22, 44, 35, 43, 18, 6, 34, 5],
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'45/1280x720/99/0/0',
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'WebM 1080p (1920x1080)')), # N/A, 192 kbps
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(45, ([45, 22, 44, 35, 43, 18, 6, 34, 5],
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'45/1280x720/99/0/0',
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'WebM 720p (1280x720)')), # 2.0 Mbps, 192 kbps
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(44, ([44, 35, 43, 18, 6, 34, 5],
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'44/854x480/99/0/0',
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'WebM 480p (854x480)')), # 1.0 Mbps, 128 kbps
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(43, ([43, 18, 6, 34, 5],
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'43/640x360/99/0/0',
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'WebM 360p (640x360)')), # 0.5 Mbps, 128 kbps
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# MP4 H.264 video, AAC audio
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# Try 35 (FLV 480p H.264 AAC) between 720p and 360p because there's no MP4 480p.
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# Try 34 (FLV 360p H.264 AAC) if 18 (MP4 360p) fails.
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# Fallback to 6 or 5 (FLV Sorenson H.263 MP3) if all fails.
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(38, ([38, 37, 22, 35, 18, 34, 6, 5],
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'38/1920x1080/9/0/115',
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'MP4 4K 3072p (4096x3072)')), # 5.0 - 3.5 Mbps, 192 kbps
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(37, ([37, 22, 35, 18, 34, 6, 5],
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'37/1920x1080/9/0/115',
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'MP4 HD 1080p (1920x1080)')), # 4.3 - 3.0 Mbps, 192 kbps
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(22, ([22, 35, 18, 34, 6, 5],
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'22/1280x720/9/0/115',
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'MP4 HD 720p (1280x720)')), # 2.9 - 2.0 Mbps, 192 kbps
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(18, ([18, 34, 6, 5],
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'18/640x360/9/0/115',
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'MP4 360p (640x360)')), # 0.5 Mbps, 96 kbps
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# FLV H.264 video, AAC audio
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# Does not check for 360p MP4.
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# Fallback to 6 or 5 (FLV Sorenson H.263 MP3) if all fails.
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(35, ([35, 34, 6, 5],
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'35/854x480/9/0/115',
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'FLV 480p (854x480)')), # 1 - 0.80 Mbps, 128 kbps
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(34, ([34, 6, 5],
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'34/640x360/9/0/115',
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'FLV 360p (640x360)')), # 0.50 Mbps, 128 kbps
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# FLV Sorenson H.263 video, MP3 audio
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(6, ([6, 5],
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'5/480x270/7/0/0',
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'FLV 270p (480x270)')), # 0.80 Mbps, 64 kbps
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(5, ([5],
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'5/320x240/7/0/0',
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'FLV 240p (320x240)')), # 0.25 Mbps, 64 kbps
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]
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formats_dict = dict(formats)
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V3_API_ENDPOINT = 'https://www.googleapis.com/youtube/v3'
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CHANNEL_VIDEOS_XML = 'https://www.youtube.com/feeds/videos.xml'
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class YouTubeError(Exception):
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pass
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def get_fmt_ids(youtube_config):
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fmt_ids = youtube_config.preferred_fmt_ids
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if not fmt_ids:
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format = formats_dict.get(youtube_config.preferred_fmt_id)
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if format is None:
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fmt_ids = []
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else:
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fmt_ids, path, description = format
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return fmt_ids
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def get_real_download_url(url, preferred_fmt_ids=None):
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if not preferred_fmt_ids:
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preferred_fmt_ids, _, _ = formats_dict[22] # MP4 720p
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vid = get_youtube_id(url)
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if vid is not None:
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page = None
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url = 'http://www.youtube.com/get_video_info?&el=detailpage&video_id=' + vid
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while page is None:
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req = util.http_request(url, method='GET')
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if 'location' in req.msg:
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url = req.msg['location']
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else:
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page = req.read()
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page = page.decode()
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# Try to find the best video format available for this video
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# (http://forum.videohelp.com/topic336882-1800.html#1912972)
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def find_urls(page):
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r4 = re.search('url_encoded_fmt_stream_map=([^&]+)', page)
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if r4 is not None:
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fmt_url_map = urllib.parse.unquote(r4.group(1))
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for fmt_url_encoded in fmt_url_map.split(','):
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video_info = parse_qs(fmt_url_encoded)
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yield int(video_info['itag'][0]), video_info['url'][0]
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else:
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error_info = parse_qs(page)
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error_message = util.remove_html_tags(error_info['reason'][0])
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raise YouTubeError('Cannot download video: %s' % error_message)
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fmt_id_url_map = sorted(find_urls(page), reverse=True)
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if not fmt_id_url_map:
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raise YouTubeError('fmt_url_map not found for video ID "%s"' % vid)
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# Default to the highest fmt_id if we don't find a match below
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_, url = fmt_id_url_map[0]
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formats_available = set(fmt_id for fmt_id, url in fmt_id_url_map)
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fmt_id_url_map = dict(fmt_id_url_map)
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for id in preferred_fmt_ids:
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id = int(id)
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if id in formats_available:
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format = formats_dict.get(id)
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if format is not None:
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_, _, description = format
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else:
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description = 'Unknown'
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logger.info('Found YouTube format: %s (fmt_id=%d)',
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description, id)
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url = fmt_id_url_map[id]
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break
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return url
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def get_youtube_id(url):
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r = re.compile('http[s]?://(?:[a-z]+\.)?youtube\.com/v/(.*)\.swf', re.IGNORECASE).match(url)
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if r is not None:
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return r.group(1)
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r = re.compile('http[s]?://(?:[a-z]+\.)?youtube\.com/watch\?v=([^&]*)', re.IGNORECASE).match(url)
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if r is not None:
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return r.group(1)
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r = re.compile('http[s]?://(?:[a-z]+\.)?youtube\.com/v/(.*)[?]', re.IGNORECASE).match(url)
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if r is not None:
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return r.group(1)
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return for_each_feed_pattern(lambda url, channel: channel, url, None)
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def is_video_link(url):
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return (get_youtube_id(url) is not None)
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def is_youtube_guid(guid):
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return guid.startswith('tag:youtube.com,2008:video:')
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def for_each_feed_pattern(func, url, fallback_result):
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"""
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Try to find the username for all possible YouTube feed/webpage URLs
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Will call func(url, channel) for each match, and if func() returns
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a result other than None, returns this. If no match is found or
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func() returns None, return fallback_result.
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"""
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CHANNEL_MATCH_PATTERNS = [
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'http[s]?://(?:[a-z]+\.)?youtube\.com/user/([a-z0-9]+)',
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'http[s]?://(?:[a-z]+\.)?youtube\.com/profile?user=([a-z0-9]+)',
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'http[s]?://(?:[a-z]+\.)?youtube\.com/channel/([-_a-zA-Z0-9]+)',
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'http[s]?://(?:[a-z]+\.)?youtube\.com/rss/user/([a-z0-9]+)/videos\.rss',
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'http[s]?://gdata.youtube.com/feeds/users/([^/]+)/uploads',
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'http[s]?://gdata.youtube.com/feeds/base/users/([^/]+)/uploads',
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'http[s]?://(?:[a-z]+\.)?youtube\.com/feeds/videos.xml\?channel_id=([-_a-zA-Z0-9]+)',
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]
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for pattern in CHANNEL_MATCH_PATTERNS:
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m = re.match(pattern, url, re.IGNORECASE)
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if m is not None:
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result = func(url, m.group(1))
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if result is not None:
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return result
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return fallback_result
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def get_real_channel_url(url):
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def return_user_feed(url, channel):
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result = 'https://gdata.youtube.com/feeds/users/{0}/uploads'.format(channel)
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logger.debug('YouTube link resolved: %s => %s', url, result)
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return result
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return for_each_feed_pattern(return_user_feed, url, url)
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def get_cover(url):
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if 'youtube.com' in url:
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class YouTubeHTMLCoverParser(HTMLParser):
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"""This custom html parser searches for the youtube channel thumbnail/avatar"""
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def __init__(self):
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super().__init__()
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self.url = ""
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def handle_starttag(self, tag, attributes):
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attribute_dict = {attribute[0]: attribute[1] for attribute in attributes}
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# Look for 900x900px image first.
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if tag == 'link' \
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and 'rel' in attribute_dict \
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and attribute_dict['rel'] == 'image_src':
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self.url = attribute_dict['href']
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# Fallback to image that may only be 100x100px.
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elif tag == 'img' \
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and 'class' in attribute_dict \
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and attribute_dict['class'] == "channel-header-profile-image":
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self.url = attribute_dict['src']
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try:
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raw_xml_data = util.urlopen(url).read().decode('utf-8')
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xml_data = xml.etree.ElementTree.fromstring(raw_xml_data)
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channel_id = xml_data.find("{http://www.youtube.com/xml/schemas/2015}channelId").text
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channel_url = 'https://www.youtube.com/channel/{}'.format(channel_id)
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html_data = util.urlopen(channel_url).read().decode('utf-8')
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parser = YouTubeHTMLCoverParser()
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parser.feed(html_data)
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if parser.url:
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logger.debug('Youtube cover art for {} is: {}'.format(url, parser.url))
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return parser.url
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except Exception:
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logger.warning('Could not retrieve cover art', exc_info=True)
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def get_channels_for_user(username, api_key_v3):
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# already a channel ID: return videos.xml.
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# Can't rely on automatic discovery, see #371
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if username.startswith('UC'):
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try:
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url = '{0}?channel_id={1}'.format(CHANNEL_VIDEOS_XML, username)
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stream = util.urlopen(url)
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return [url]
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except urllib.error.HTTPError as e:
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logger.debug("get_channels_for_user(%s) not a channel id (got %i response code)", username, e.code)
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except:
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logger.error("get_channels_for_user(%s) not a channel id (got unexpected exception)", username)
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# try username to channel ID conversion
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stream = util.urlopen('{0}/channels?forUsername={1}&part=id&key={2}'.format(V3_API_ENDPOINT, username, api_key_v3))
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data = json.load(stream)
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return ['{0}?channel_id={1}'.format(CHANNEL_VIDEOS_XML, item['id']) for item in data['items']]
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def parse_youtube_url(url):
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"""
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Youtube Channel Links are parsed into youtube feed links
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>>> parse_youtube_url("https://www.youtube.com/channel/CHANNEL_ID")
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'https://www.youtube.com/feeds/videos.xml?channel_id=CHANNEL_ID'
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Youtube User Links are parsed into youtube feed links
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>>> parse_youtube_url("https://www.youtube.com/user/USERNAME")
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'https://www.youtube.com/feeds/videos.xml?user=USERNAME'
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Youtube Playlist Links are parsed into youtube feed links
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>>> parse_youtube_url("https://www.youtube.com/playlist?list=PLAYLIST_ID")
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'https://www.youtube.com/feeds/videos.xml?playlist_id=PLAYLIST_ID'
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>>> parse_youtube_url(None)
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None
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@param url: the path to the channel, user or playlist
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@return: the feed url if successful or the given url if not
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"""
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if url is None:
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return url
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scheme, netloc, path, query, fragment = urllib.parse.urlsplit(url)
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logger.debug("Analyzing URL: {}".format(" ".join([scheme, netloc, path, query, fragment])))
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if 'youtube.com' in netloc and ('/user/' in path or '/channel/' in path or 'list=' in query):
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logger.debug("Valid Youtube URL detected. Parsing...")
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if path.startswith('/user/'):
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user_id = path.split('/')[2]
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query = 'user={user_id}'.format(user_id=user_id)
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if path.startswith('/channel/'):
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channel_id = path.split('/')[2]
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query = 'channel_id={channel_id}'.format(channel_id=channel_id)
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if 'list=' in query:
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playlist_query = [query_value for query_value in query.split("&") if 'list=' in query_value][0]
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playlist_id = playlist_query.strip("list=")
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query = 'playlist_id={playlist_id}'.format(playlist_id=playlist_id)
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path = '/feeds/videos.xml'
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new_url = urllib.parse.urlunsplit((scheme, netloc, path, query, fragment))
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logger.debug("New Youtube URL: {}".format(new_url))
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return new_url
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else:
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logger.debug("Not a valid Youtube URL: {}".format(url))
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return url
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