mirror of
https://github.com/ytdl-org/youtube-dl
synced 2024-11-27 17:26:51 +01:00
[channel9] Initial implementation (#1885)
This commit is contained in:
dst
parent
49929a20a7
commit
df53747436
351
youtube_dl/extractor/channel9.py
Normal file
351
youtube_dl/extractor/channel9.py
Normal file
@ -0,0 +1,351 @@
|
||||
# encoding: utf-8
|
||||
|
||||
import re
|
||||
|
||||
from .common import InfoExtractor
|
||||
from ..utils import (
|
||||
format_bytes,
|
||||
ExtractorError,
|
||||
)
|
||||
|
||||
class Channel9IE(InfoExtractor):
|
||||
'''
|
||||
Common extractor for channel9.msdn.com.
|
||||
|
||||
The type of provided URL (video or playlist) is determined according to
|
||||
meta Search.PageType from web page HTML rather than URL itself, as it is
|
||||
not always possible to do.
|
||||
'''
|
||||
IE_DESC = u'Channel 9'
|
||||
IE_NAME = u'channel9'
|
||||
_VALID_URL = r'^https?://(?:www\.)?channel9\.msdn\.com/(?P<contentpath>.+)/?'
|
||||
|
||||
_TESTS = [
|
||||
{
|
||||
u'url': u'http://channel9.msdn.com/Events/TechEd/Australia/2013/KOS002',
|
||||
u'file': u'Events_TechEd_Australia_2013_KOS002.mp4',
|
||||
u'md5': u'bbd75296ba47916b754e73c3a4bbdf10',
|
||||
u'info_dict': {
|
||||
u'title': u'Developer Kick-Off Session: Stuff We Love',
|
||||
u'description': u'md5:c08d72240b7c87fcecafe2692f80e35f',
|
||||
u'duration': 4576,
|
||||
u'thumbnail': u'http://media.ch9.ms/ch9/9d51/03902f2d-fc97-4d3c-b195-0bfe15a19d51/KOS002_220.jpg',
|
||||
u'session_code': u'KOS002',
|
||||
u'session_day': u'Day 1',
|
||||
u'session_room': u'Arena 1A',
|
||||
u'session_speakers': [ u'Ed Blankenship', u'Andrew Coates', u'Brady Gaster', u'Patrick Klug', u'Mads Kristensen' ],
|
||||
},
|
||||
},
|
||||
{
|
||||
u'url': u'http://channel9.msdn.com/posts/Self-service-BI-with-Power-BI-nuclear-testing',
|
||||
u'file': u'posts_Self-service-BI-with-Power-BI-nuclear-testing.mp4',
|
||||
u'md5': u'b43ee4529d111bc37ba7ee4f34813e68',
|
||||
u'info_dict': {
|
||||
u'title': u'Self-service BI with Power BI - nuclear testing',
|
||||
u'description': u'md5:a6d5cfd9ee46d1851cf6e40ea61cfc10',
|
||||
u'duration': 1540,
|
||||
u'thumbnail': u'http://media.ch9.ms/ch9/87e1/0300391f-a455-4c72-bec3-4422f19287e1/selfservicenuk_512.jpg',
|
||||
u'authors': [ u'Mike Wilmot' ],
|
||||
},
|
||||
}
|
||||
]
|
||||
|
||||
_RSS_URL = 'http://channel9.msdn.com/%s/RSS'
|
||||
_EXTRACT_ENTRY_ITEMS_FROM_RSS = False
|
||||
|
||||
# Sorted by quality
|
||||
_known_formats = ['MP3', 'MP4', 'Mid Quality WMV', 'Mid Quality MP4', 'High Quality WMV', 'High Quality MP4']
|
||||
|
||||
def _restore_bytes(self, formatted_size):
|
||||
if not formatted_size:
|
||||
return 0
|
||||
m = re.match(r'^(?P<size>\d+(?:\.\d+)?)\s+(?P<units>[a-zA-Z]+)', formatted_size)
|
||||
if not m:
|
||||
return 0
|
||||
units = m.group('units')
|
||||
try:
|
||||
exponent = [u'B', u'KB', u'MB', u'GB', u'TB', u'PB', u'EB', u'ZB', u'YB'].index(units.upper())
|
||||
except ValueError:
|
||||
return 0
|
||||
size = float(m.group('size'))
|
||||
return int(size * (1024 ** exponent))
|
||||
|
||||
def _formats_from_html(self, html):
|
||||
FORMAT_REGEX = r'''
|
||||
(?x)
|
||||
<a\s+href="(?P<url>[^"]+)">(?P<quality>[^<]+)</a>\s*
|
||||
<span\s+class="usage">\((?P<note>[^\)]+)\)</span>\s*
|
||||
(?:<div\s+class="popup\s+rounded">\s*
|
||||
<h3>File\s+size</h3>\s*(?P<filesize>.*?)\s*
|
||||
</div>)? # File size part may be missing
|
||||
'''
|
||||
# Extract known formats
|
||||
formats = [{'url': x.group('url'),
|
||||
'format_id': x.group('quality'),
|
||||
'format_note': x.group('note'),
|
||||
'format': '%s (%s)' % (x.group('quality'), x.group('note')),
|
||||
'filesize': self._restore_bytes(x.group('filesize')), # File size is approximate
|
||||
} for x in list(re.finditer(FORMAT_REGEX, html)) if x.group('quality') in self._known_formats]
|
||||
# Sort according to known formats list
|
||||
formats.sort(key=lambda fmt: self._known_formats.index(fmt['format_id']))
|
||||
return formats
|
||||
|
||||
def _formats_from_rss_item(self, item):
|
||||
|
||||
def process_formats(elem):
|
||||
formats = []
|
||||
for media_content in elem.findall('./{http://search.yahoo.com/mrss/}content'):
|
||||
url = media_content.attrib['url']
|
||||
# Ignore unrelated media
|
||||
if url.endswith('.ism/manifest'):
|
||||
continue
|
||||
format_note = media_content.attrib['type']
|
||||
filesize = int(media_content.attrib['fileSize'])
|
||||
formats.append({'url': url,
|
||||
'format_note': format_note,
|
||||
'format': '%s %s' % (format_note, format_bytes(filesize)),
|
||||
'filesize': filesize,
|
||||
})
|
||||
return formats
|
||||
|
||||
formats = []
|
||||
|
||||
for media_group in item.findall('./{http://search.yahoo.com/mrss/}group'):
|
||||
formats.extend(process_formats(media_group))
|
||||
|
||||
# Sometimes there are no media:groups in item, but there is media:content
|
||||
# right in item (usually when there is the only media source)
|
||||
formats.extend(process_formats(item))
|
||||
|
||||
# Sort by file size
|
||||
formats.sort(key=lambda fmt: fmt['filesize'])
|
||||
return formats
|
||||
|
||||
def _extract_title(self, html):
|
||||
title = self._html_search_meta(u'title', html, u'title')
|
||||
if title is None:
|
||||
title = self._og_search_title(html)
|
||||
TITLE_SUFFIX = u' (Channel 9)'
|
||||
if title is not None and title.endswith(TITLE_SUFFIX):
|
||||
title = title[:-len(TITLE_SUFFIX)]
|
||||
return title
|
||||
|
||||
def _extract_description(self, html):
|
||||
DESCRIPTION_REGEX = r'''(?sx)
|
||||
<div\s+class="entry-content">\s*
|
||||
<div\s+id="entry-body">\s*
|
||||
(?P<description>.+?)\s*
|
||||
</div>\s*
|
||||
</div>
|
||||
'''
|
||||
m = re.search(DESCRIPTION_REGEX, html)
|
||||
if m is not None:
|
||||
return m.group('description')
|
||||
return self._html_search_meta(u'description', html, u'description')
|
||||
|
||||
def _extract_duration(self, html):
|
||||
m = re.search(r'data-video_duration="(?P<hours>\d{2}):(?P<minutes>\d{2}):(?P<seconds>\d{2})"', html)
|
||||
return ((int(m.group('hours')) * 60 * 60) + (int(m.group('minutes')) * 60) + int(m.group('seconds'))) if m else None
|
||||
|
||||
def _extract_slides(self, html):
|
||||
m = re.search(r'<a href="(?P<slidesurl>[^"]+)" class="slides">Slides</a>', html)
|
||||
return m.group('slidesurl') if m is not None else None
|
||||
|
||||
def _extract_zip(self, html):
|
||||
m = re.search(r'<a href="(?P<zipurl>[^"]+)" class="zip">Zip</a>', html)
|
||||
return m.group('zipurl') if m is not None else None
|
||||
|
||||
def _extract_avg_rating(self, html):
|
||||
m = re.search(r'<p class="avg-rating">Avg Rating: <span>(?P<avgrating>[^<]+)</span></p>', html)
|
||||
return float(m.group('avgrating')) if m is not None else 0
|
||||
|
||||
def _extract_rating_count(self, html):
|
||||
m = re.search(r'<div class="rating-count">\((?P<ratingcount>[^<]+)\)</div>', html)
|
||||
return int(self._fix_count(m.group('ratingcount'))) if m is not None else 0
|
||||
|
||||
def _extract_view_count(self, html):
|
||||
m = re.search(r'<li class="views">\s*<span class="count">(?P<viewcount>[^<]+)</span> Views\s*</li>', html)
|
||||
return int(self._fix_count(m.group('viewcount'))) if m is not None else 0
|
||||
|
||||
def _extract_comment_count(self, html):
|
||||
m = re.search(r'<li class="comments">\s*<a href="#comments">\s*<span class="count">(?P<commentcount>[^<]+)</span> Comments\s*</a>\s*</li>', html)
|
||||
return int(self._fix_count(m.group('commentcount'))) if m is not None else 0
|
||||
|
||||
def _fix_count(self, count):
|
||||
return int(str(count).replace(',', '')) if count is not None else None
|
||||
|
||||
def _extract_authors(self, html):
|
||||
m = re.search(r'(?s)<li class="author">(.*?)</li>', html)
|
||||
if m is None:
|
||||
return None
|
||||
return re.findall(r'<a href="/Niners/[^"]+">([^<]+)</a>', m.group(1))
|
||||
|
||||
def _extract_session_code(self, html):
|
||||
m = re.search(r'<li class="code">\s*(?P<code>.+?)\s*</li>', html)
|
||||
return m.group('code') if m is not None else None
|
||||
|
||||
def _extract_session_day(self, html):
|
||||
m = re.search(r'<li class="day">\s*<a href="/Events/[^"]+">(?P<day>[^<]+)</a>\s*</li>', html)
|
||||
return m.group('day') if m is not None else None
|
||||
|
||||
def _extract_session_room(self, html):
|
||||
m = re.search(r'<li class="room">\s*(?P<room>.+?)\s*</li>', html)
|
||||
return m.group('room') if m is not None else None
|
||||
|
||||
def _extract_session_speakers(self, html):
|
||||
return re.findall(r'<a href="/Events/Speakers/[^"]+">([^<]+)</a>', html)
|
||||
|
||||
def _extract_content(self, html, content_path):
|
||||
# Look for downloadable content
|
||||
formats = self._formats_from_html(html)
|
||||
slides = self._extract_slides(html)
|
||||
zip_ = self._extract_zip(html)
|
||||
|
||||
# Nothing to download
|
||||
if len(formats) == 0 and slides is None and zip_ is None:
|
||||
self._downloader.report_warning(u'None of recording, slides or zip are available for %s' % content_path)
|
||||
return
|
||||
|
||||
# Extract meta
|
||||
title = self._extract_title(html)
|
||||
description = self._extract_description(html)
|
||||
thumbnail = self._og_search_thumbnail(html)
|
||||
duration = self._extract_duration(html)
|
||||
avg_rating = self._extract_avg_rating(html)
|
||||
rating_count = self._extract_rating_count(html)
|
||||
view_count = self._extract_view_count(html)
|
||||
comment_count = self._extract_comment_count(html)
|
||||
|
||||
common = {'_type': 'video',
|
||||
'id': content_path,
|
||||
'description': description,
|
||||
'thumbnail': thumbnail,
|
||||
'duration': duration,
|
||||
'avg_rating': avg_rating,
|
||||
'rating_count': rating_count,
|
||||
'view_count': view_count,
|
||||
'comment_count': comment_count,
|
||||
}
|
||||
|
||||
result = []
|
||||
|
||||
if slides is not None:
|
||||
d = common.copy()
|
||||
d.update({ 'title': title + '-Slides', 'url': slides })
|
||||
result.append(d)
|
||||
|
||||
if zip_ is not None:
|
||||
d = common.copy()
|
||||
d.update({ 'title': title + '-Zip', 'url': zip_ })
|
||||
result.append(d)
|
||||
|
||||
if len(formats) > 0:
|
||||
d = common.copy()
|
||||
d.update({ 'title': title, 'formats': formats })
|
||||
result.append(d)
|
||||
|
||||
return result
|
||||
|
||||
def _extract_entry_item(self, html, content_path):
|
||||
contents = self._extract_content(html, content_path)
|
||||
if contents is None:
|
||||
return contents
|
||||
|
||||
authors = self._extract_authors(html)
|
||||
|
||||
for content in contents:
|
||||
content['authors'] = authors
|
||||
|
||||
return contents
|
||||
|
||||
def _extract_session(self, html, content_path):
|
||||
contents = self._extract_content(html, content_path)
|
||||
if contents is None:
|
||||
return contents
|
||||
|
||||
session_meta = {'session_code': self._extract_session_code(html),
|
||||
'session_day': self._extract_session_day(html),
|
||||
'session_room': self._extract_session_room(html),
|
||||
'session_speakers': self._extract_session_speakers(html),
|
||||
}
|
||||
|
||||
for content in contents:
|
||||
content.update(session_meta)
|
||||
|
||||
return contents
|
||||
|
||||
def _extract_content_rss(self, rss):
|
||||
'''
|
||||
Extracts links to entry items right out of RSS feed.
|
||||
This approach is faster than extracting from web pages
|
||||
one by one, but suffers from some problems.
|
||||
Pros:
|
||||
- no need to download additional pages
|
||||
- provides more media links
|
||||
- accurate file size
|
||||
Cons:
|
||||
- fewer meta data provided
|
||||
- links to media files have no appropriate data that may be used as format_id
|
||||
- RSS does not contain links to presentation materials (slides, zip)
|
||||
'''
|
||||
entries = []
|
||||
for item in rss.findall('./channel/item'):
|
||||
url = item.find('./link').text
|
||||
video_id = url.split('/')[-1]
|
||||
formats = self._formats_from_rss_item(item)
|
||||
|
||||
if len(formats) == 0:
|
||||
self._downloader.report_warning(u'The recording for session %s is not yet available' % video_id)
|
||||
continue
|
||||
|
||||
title = item.find('./title').text
|
||||
description = item.find('./description').text
|
||||
|
||||
thumbnail = item.find('./{http://search.yahoo.com/mrss/}thumbnail').text
|
||||
|
||||
duration_e = item.find('./{http://www.itunes.com/dtds/podcast-1.0.dtd}duration')
|
||||
duration = duration_e.text if duration_e is not None else 0
|
||||
|
||||
speakers_e = item.find('./{http://purl.org/dc/elements/1.1/}creator')
|
||||
speakers = speakers_e.text.split(', ') if speakers_e is not None and speakers_e.text else []
|
||||
|
||||
entries.append({'_type': 'video',
|
||||
'id': video_id,
|
||||
'formats': formats,
|
||||
'title': title,
|
||||
'description': description,
|
||||
'thumbnail': thumbnail,
|
||||
'duration': duration,
|
||||
'session_speakers': speakers,
|
||||
})
|
||||
return entries
|
||||
|
||||
def _extract_list(self, content_path):
|
||||
rss = self._download_xml(self._RSS_URL % content_path, content_path, u'Downloading RSS')
|
||||
if self._EXTRACT_ENTRY_ITEMS_FROM_RSS:
|
||||
return self._extract_content_rss(rss)
|
||||
else:
|
||||
entries = [self.url_result(session_url.text, 'Channel9')
|
||||
for session_url in rss.findall('./channel/item/link')]
|
||||
title_text = rss.find('./channel/title').text
|
||||
return self.playlist_result(entries, content_path, title_text)
|
||||
|
||||
def _real_extract(self, url):
|
||||
mobj = re.match(self._VALID_URL, url)
|
||||
content_path = mobj.group('contentpath')
|
||||
|
||||
webpage = self._download_webpage(url, content_path, u'Downloading web page')
|
||||
|
||||
page_type_m = re.search(r'<meta name="Search.PageType" content="(?P<pagetype>[^"]+)"/>', webpage)
|
||||
if page_type_m is None:
|
||||
raise ExtractorError(u'Search.PageType not found, don\'t know how to process this page', expected=True)
|
||||
|
||||
page_type = page_type_m.group('pagetype')
|
||||
if page_type == 'List': # List page, may contain list of 'item'-like objects
|
||||
return self._extract_list(content_path)
|
||||
elif page_type == 'Entry.Item': # Any 'item'-like page, may contain downloadable content
|
||||
return self._extract_entry_item(webpage, content_path)
|
||||
elif page_type == 'Session': # Event session page, may contain downloadable content
|
||||
return self._extract_session(webpage, content_path)
|
||||
else:
|
||||
raise ExtractorError(u'Unexpected Search.PageType %s' % page_type, expected=True)
|
||||
Loading…
Reference in New Issue
Block a user