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youtube-dl/youtube_dl/extractor/udemy.py

482 lines
19 KiB
Python

from __future__ import unicode_literals
import re
from .common import InfoExtractor
from ..compat import (
compat_HTTPError,
compat_kwargs,
compat_str,
compat_urllib_request,
compat_urlparse,
)
from ..utils import (
determine_ext,
extract_attributes,
ExtractorError,
float_or_none,
int_or_none,
js_to_json,
sanitized_Request,
try_get,
unescapeHTML,
url_or_none,
urlencode_postdata,
)
class UdemyIE(InfoExtractor):
IE_NAME = 'udemy'
_VALID_URL = r'''(?x)
https?://
(?:[^/]+\.)?udemy\.com/
(?:
[^#]+\#/lecture/|
lecture/view/?\?lectureId=|
[^/]+/learn/v4/t/lecture/
)
(?P<id>\d+)
'''
_LOGIN_URL = 'https://www.udemy.com/join/login-popup/?displayType=ajax&showSkipButton=1'
_ORIGIN_URL = 'https://www.udemy.com'
_NETRC_MACHINE = 'udemy'
_TESTS = [{
'url': 'https://www.udemy.com/java-tutorial/#/lecture/172757',
'md5': '98eda5b657e752cf945d8445e261b5c5',
'info_dict': {
'id': '160614',
'ext': 'mp4',
'title': 'Introduction and Installation',
'description': 'md5:c0d51f6f21ef4ec65f091055a5eef876',
'duration': 579.29,
},
'skip': 'Requires udemy account credentials',
}, {
# new URL schema
'url': 'https://www.udemy.com/electric-bass-right-from-the-start/learn/v4/t/lecture/4580906',
'only_matching': True,
}, {
# no url in outputs format entry
'url': 'https://www.udemy.com/learn-web-development-complete-step-by-step-guide-to-success/learn/v4/t/lecture/4125812',
'only_matching': True,
}, {
# only outputs rendition
'url': 'https://www.udemy.com/how-you-can-help-your-local-community-5-amazing-examples/learn/v4/t/lecture/3225750?start=0',
'only_matching': True,
}, {
'url': 'https://wipro.udemy.com/java-tutorial/#/lecture/172757',
'only_matching': True,
}]
def _extract_course_info(self, webpage, video_id):
course = self._parse_json(
unescapeHTML(self._search_regex(
r'ng-init=["\'].*\bcourse=({.+?})[;"\']',
webpage, 'course', default='{}')),
video_id, fatal=False) or {}
course_id = course.get('id') or self._search_regex(
[
r'data-course-id=["\'](\d+)',
r'&quot;courseId&quot;\s*:\s*(\d+)'
], webpage, 'course id')
return course_id, course.get('title')
def _enroll_course(self, base_url, webpage, course_id):
def combine_url(base_url, url):
return compat_urlparse.urljoin(base_url, url) if not url.startswith('http') else url
checkout_url = unescapeHTML(self._search_regex(
r'href=(["\'])(?P<url>(?:https?://(?:www\.)?udemy\.com)?/(?:payment|cart)/checkout/.+?)\1',
webpage, 'checkout url', group='url', default=None))
if checkout_url:
raise ExtractorError(
'Course %s is not free. You have to pay for it before you can download. '
'Use this URL to confirm purchase: %s'
% (course_id, combine_url(base_url, checkout_url)),
expected=True)
enroll_url = unescapeHTML(self._search_regex(
r'href=(["\'])(?P<url>(?:https?://(?:www\.)?udemy\.com)?/course/subscribe/.+?)\1',
webpage, 'enroll url', group='url', default=None))
if enroll_url:
webpage = self._download_webpage(
combine_url(base_url, enroll_url),
course_id, 'Enrolling in the course',
headers={'Referer': base_url})
if '>You have enrolled in' in webpage:
self.to_screen('%s: Successfully enrolled in the course' % course_id)
def _download_lecture(self, course_id, lecture_id):
return self._download_json(
'https://www.udemy.com/api-2.0/users/me/subscribed-courses/%s/lectures/%s?'
% (course_id, lecture_id),
lecture_id, 'Downloading lecture JSON', query={
'fields[lecture]': 'title,description,view_html,asset',
'fields[asset]': 'asset_type,stream_url,thumbnail_url,download_urls,stream_urls,captions,data',
})
def _handle_error(self, response):
if not isinstance(response, dict):
return
error = response.get('error')
if error:
error_str = 'Udemy returned error #%s: %s' % (error.get('code'), error.get('message'))
error_data = error.get('data')
if error_data:
error_str += ' - %s' % error_data.get('formErrors')
raise ExtractorError(error_str, expected=True)
def _download_webpage_handle(self, *args, **kwargs):
headers = kwargs.get('headers', {}).copy()
headers['User-Agent'] = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.109 Safari/537.36'
kwargs['headers'] = headers
ret = super(UdemyIE, self)._download_webpage_handle(
*args, **compat_kwargs(kwargs))
if not ret:
return ret
webpage, _ = ret
if any(p in webpage for p in (
'>Please verify you are a human',
'Access to this page has been denied because we believe you are using automation tools to browse the website',
'"_pxCaptcha"')):
raise ExtractorError(
'Udemy asks you to solve a CAPTCHA. Login with browser, '
'solve CAPTCHA, then export cookies and pass cookie file to '
'youtube-dl with --cookies.', expected=True)
return ret
def _download_json(self, url_or_request, *args, **kwargs):
headers = {
'X-Udemy-Snail-Case': 'true',
'X-Requested-With': 'XMLHttpRequest',
}
for cookie in self._downloader.cookiejar:
if cookie.name == 'client_id':
headers['X-Udemy-Client-Id'] = cookie.value
elif cookie.name == 'access_token':
headers['X-Udemy-Bearer-Token'] = cookie.value
headers['X-Udemy-Authorization'] = 'Bearer %s' % cookie.value
if isinstance(url_or_request, compat_urllib_request.Request):
for header, value in headers.items():
url_or_request.add_header(header, value)
else:
url_or_request = sanitized_Request(url_or_request, headers=headers)
response = super(UdemyIE, self)._download_json(url_or_request, *args, **kwargs)
self._handle_error(response)
return response
def _real_initialize(self):
self._login()
def _login(self):
username, password = self._get_login_info()
if username is None:
return
login_popup = self._download_webpage(
self._LOGIN_URL, None, 'Downloading login popup')
def is_logged(webpage):
return any(re.search(p, webpage) for p in (
r'href=["\'](?:https://www\.udemy\.com)?/user/logout/',
r'>Logout<'))
# already logged in
if is_logged(login_popup):
return
login_form = self._form_hidden_inputs('login-form', login_popup)
login_form.update({
'email': username,
'password': password,
})
response = self._download_webpage(
self._LOGIN_URL, None, 'Logging in',
data=urlencode_postdata(login_form),
headers={
'Referer': self._ORIGIN_URL,
'Origin': self._ORIGIN_URL,
})
if not is_logged(response):
error = self._html_search_regex(
r'(?s)<div[^>]+class="form-errors[^"]*">(.+?)</div>',
response, 'error message', default=None)
if error:
raise ExtractorError('Unable to login: %s' % error, expected=True)
raise ExtractorError('Unable to log in')
def _real_extract(self, url):
lecture_id = self._match_id(url)
webpage = self._download_webpage(url, lecture_id)
course_id, _ = self._extract_course_info(webpage, lecture_id)
try:
lecture = self._download_lecture(course_id, lecture_id)
except ExtractorError as e:
# Error could possibly mean we are not enrolled in the course
if isinstance(e.cause, compat_HTTPError) and e.cause.code == 403:
self._enroll_course(url, webpage, course_id)
lecture = self._download_lecture(course_id, lecture_id)
else:
raise
title = lecture['title']
description = lecture.get('description')
asset = lecture['asset']
asset_type = asset.get('asset_type') or asset.get('assetType')
if asset_type != 'Video':
raise ExtractorError(
'Lecture %s is not a video' % lecture_id, expected=True)
stream_url = asset.get('stream_url') or asset.get('streamUrl')
if stream_url:
youtube_url = self._search_regex(
r'(https?://www\.youtube\.com/watch\?v=.*)', stream_url, 'youtube URL', default=None)
if youtube_url:
return self.url_result(youtube_url, 'Youtube')
video_id = compat_str(asset['id'])
thumbnail = asset.get('thumbnail_url') or asset.get('thumbnailUrl')
duration = float_or_none(asset.get('data', {}).get('duration'))
subtitles = {}
automatic_captions = {}
formats = []
def extract_output_format(src, f_id):
return {
'url': src.get('url'),
'format_id': '%sp' % (src.get('height') or f_id),
'width': int_or_none(src.get('width')),
'height': int_or_none(src.get('height')),
'vbr': int_or_none(src.get('video_bitrate_in_kbps')),
'vcodec': src.get('video_codec'),
'fps': int_or_none(src.get('frame_rate')),
'abr': int_or_none(src.get('audio_bitrate_in_kbps')),
'acodec': src.get('audio_codec'),
'asr': int_or_none(src.get('audio_sample_rate')),
'tbr': int_or_none(src.get('total_bitrate_in_kbps')),
'filesize': int_or_none(src.get('file_size_in_bytes')),
}
outputs = asset.get('data', {}).get('outputs')
if not isinstance(outputs, dict):
outputs = {}
def add_output_format_meta(f, key):
output = outputs.get(key)
if isinstance(output, dict):
output_format = extract_output_format(output, key)
output_format.update(f)
return output_format
return f
def extract_formats(source_list):
if not isinstance(source_list, list):
return
for source in source_list:
video_url = url_or_none(source.get('file') or source.get('src'))
if not video_url:
continue
if source.get('type') == 'application/x-mpegURL' or determine_ext(video_url) == 'm3u8':
formats.extend(self._extract_m3u8_formats(
video_url, video_id, 'mp4', entry_protocol='m3u8_native',
m3u8_id='hls', fatal=False))
continue
format_id = source.get('label')
f = {
'url': video_url,
'format_id': '%sp' % format_id,
'height': int_or_none(format_id),
}
if format_id:
# Some videos contain additional metadata (e.g.
# https://www.udemy.com/ios9-swift/learn/#/lecture/3383208)
f = add_output_format_meta(f, format_id)
formats.append(f)
def extract_subtitles(track_list):
if not isinstance(track_list, list):
return
for track in track_list:
if not isinstance(track, dict):
continue
if track.get('kind') != 'captions':
continue
src = url_or_none(track.get('src'))
if not src:
continue
lang = track.get('language') or track.get(
'srclang') or track.get('label')
sub_dict = automatic_captions if track.get(
'autogenerated') is True else subtitles
sub_dict.setdefault(lang, []).append({
'url': src,
})
for url_kind in ('download', 'stream'):
urls = asset.get('%s_urls' % url_kind)
if isinstance(urls, dict):
extract_formats(urls.get('Video'))
captions = asset.get('captions')
if isinstance(captions, list):
for cc in captions:
if not isinstance(cc, dict):
continue
cc_url = url_or_none(cc.get('url'))
if not cc_url:
continue
lang = try_get(cc, lambda x: x['locale']['locale'], compat_str)
sub_dict = (automatic_captions if cc.get('source') == 'auto'
else subtitles)
sub_dict.setdefault(lang or 'en', []).append({
'url': cc_url,
})
view_html = lecture.get('view_html')
if view_html:
view_html_urls = set()
for source in re.findall(r'<source[^>]+>', view_html):
attributes = extract_attributes(source)
src = attributes.get('src')
if not src:
continue
res = attributes.get('data-res')
height = int_or_none(res)
if src in view_html_urls:
continue
view_html_urls.add(src)
if attributes.get('type') == 'application/x-mpegURL' or determine_ext(src) == 'm3u8':
m3u8_formats = self._extract_m3u8_formats(
src, video_id, 'mp4', entry_protocol='m3u8_native',
m3u8_id='hls', fatal=False)
for f in m3u8_formats:
m = re.search(r'/hls_(?P<height>\d{3,4})_(?P<tbr>\d{2,})/', f['url'])
if m:
if not f.get('height'):
f['height'] = int(m.group('height'))
if not f.get('tbr'):
f['tbr'] = int(m.group('tbr'))
formats.extend(m3u8_formats)
else:
formats.append(add_output_format_meta({
'url': src,
'format_id': '%dp' % height if height else None,
'height': height,
}, res))
# react rendition since 2017.04.15 (see
# https://github.com/ytdl-org/youtube-dl/issues/12744)
data = self._parse_json(
self._search_regex(
r'videojs-setup-data=(["\'])(?P<data>{.+?})\1', view_html,
'setup data', default='{}', group='data'), video_id,
transform_source=unescapeHTML, fatal=False)
if data and isinstance(data, dict):
extract_formats(data.get('sources'))
if not duration:
duration = int_or_none(data.get('duration'))
extract_subtitles(data.get('tracks'))
if not subtitles and not automatic_captions:
text_tracks = self._parse_json(
self._search_regex(
r'text-tracks=(["\'])(?P<data>\[.+?\])\1', view_html,
'text tracks', default='{}', group='data'), video_id,
transform_source=lambda s: js_to_json(unescapeHTML(s)),
fatal=False)
extract_subtitles(text_tracks)
if not formats and outputs:
for format_id, output in outputs.items():
f = extract_output_format(output, format_id)
if f.get('url'):
formats.append(f)
self._sort_formats(formats, field_preference=('height', 'width', 'tbr', 'format_id'))
return {
'id': video_id,
'title': title,
'description': description,
'thumbnail': thumbnail,
'duration': duration,
'formats': formats,
'subtitles': subtitles,
'automatic_captions': automatic_captions,
}
class UdemyCourseIE(UdemyIE):
IE_NAME = 'udemy:course'
_VALID_URL = r'https?://(?:[^/]+\.)?udemy\.com/(?P<id>[^/?#&]+)'
_TESTS = [{
'url': 'https://www.udemy.com/java-tutorial/',
'only_matching': True,
}, {
'url': 'https://wipro.udemy.com/java-tutorial/',
'only_matching': True,
}]
@classmethod
def suitable(cls, url):
return False if UdemyIE.suitable(url) else super(UdemyCourseIE, cls).suitable(url)
def _real_extract(self, url):
course_path = self._match_id(url)
webpage = self._download_webpage(url, course_path)
course_id, title = self._extract_course_info(webpage, course_path)
self._enroll_course(url, webpage, course_id)
response = self._download_json(
'https://www.udemy.com/api-2.0/courses/%s/cached-subscriber-curriculum-items' % course_id,
course_id, 'Downloading course curriculum', query={
'fields[chapter]': 'title,object_index',
'fields[lecture]': 'title,asset',
'page_size': '1000',
})
entries = []
chapter, chapter_number = [None] * 2
for entry in response['results']:
clazz = entry.get('_class')
if clazz == 'lecture':
asset = entry.get('asset')
if isinstance(asset, dict):
asset_type = asset.get('asset_type') or asset.get('assetType')
if asset_type != 'Video':
continue
lecture_id = entry.get('id')
if lecture_id:
entry = {
'_type': 'url_transparent',
'url': 'https://www.udemy.com/%s/learn/v4/t/lecture/%s' % (course_path, entry['id']),
'title': entry.get('title'),
'ie_key': UdemyIE.ie_key(),
}
if chapter_number:
entry['chapter_number'] = chapter_number
if chapter:
entry['chapter'] = chapter
entries.append(entry)
elif clazz == 'chapter':
chapter_number = entry.get('object_index')
chapter = entry.get('title')
return self.playlist_result(entries, course_id, title)