mirror of
https://github.com/l1ving/youtube-dl
synced 2024-11-23 07:42:53 +08:00
360 lines
14 KiB
Python
360 lines
14 KiB
Python
from __future__ import unicode_literals
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import re
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from .common import InfoExtractor
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from ..compat import (
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compat_HTTPError,
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compat_urllib_request,
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compat_urlparse,
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)
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from ..utils import (
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determine_ext,
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extract_attributes,
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ExtractorError,
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float_or_none,
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int_or_none,
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sanitized_Request,
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unescapeHTML,
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urlencode_postdata,
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)
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class UdemyIE(InfoExtractor):
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IE_NAME = 'udemy'
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_VALID_URL = r'''(?x)
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https?://
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www\.udemy\.com/
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(?:
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[^#]+\#/lecture/|
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lecture/view/?\?lectureId=|
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[^/]+/learn/v4/t/lecture/
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)
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(?P<id>\d+)
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'''
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_LOGIN_URL = 'https://www.udemy.com/join/login-popup/?displayType=ajax&showSkipButton=1'
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_ORIGIN_URL = 'https://www.udemy.com'
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_NETRC_MACHINE = 'udemy'
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_TESTS = [{
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'url': 'https://www.udemy.com/java-tutorial/#/lecture/172757',
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'md5': '98eda5b657e752cf945d8445e261b5c5',
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'info_dict': {
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'id': '160614',
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'ext': 'mp4',
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'title': 'Introduction and Installation',
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'description': 'md5:c0d51f6f21ef4ec65f091055a5eef876',
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'duration': 579.29,
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},
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'skip': 'Requires udemy account credentials',
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}, {
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# new URL schema
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'url': 'https://www.udemy.com/electric-bass-right-from-the-start/learn/v4/t/lecture/4580906',
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'only_matching': True,
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}]
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def _extract_course_info(self, webpage, video_id):
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course = self._parse_json(
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unescapeHTML(self._search_regex(
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r'ng-init=["\'].*\bcourse=({.+?});', webpage, 'course', default='{}')),
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video_id, fatal=False) or {}
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course_id = course.get('id') or self._search_regex(
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(r'"id"\s*:\s*(\d+)', r'data-course-id=["\'](\d+)'),
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webpage, 'course id')
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return course_id, course.get('title')
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def _enroll_course(self, base_url, webpage, course_id):
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def combine_url(base_url, url):
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return compat_urlparse.urljoin(base_url, url) if not url.startswith('http') else url
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checkout_url = unescapeHTML(self._search_regex(
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r'href=(["\'])(?P<url>(?:https?://(?:www\.)?udemy\.com)?/payment/checkout/.+?)\1',
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webpage, 'checkout url', group='url', default=None))
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if checkout_url:
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raise ExtractorError(
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'Course %s is not free. You have to pay for it before you can download. '
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'Use this URL to confirm purchase: %s'
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% (course_id, combine_url(base_url, checkout_url)),
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expected=True)
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enroll_url = unescapeHTML(self._search_regex(
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r'href=(["\'])(?P<url>(?:https?://(?:www\.)?udemy\.com)?/course/subscribe/.+?)\1',
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webpage, 'enroll url', group='url', default=None))
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if enroll_url:
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webpage = self._download_webpage(
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combine_url(base_url, enroll_url),
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course_id, 'Enrolling in the course',
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headers={'Referer': base_url})
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if '>You have enrolled in' in webpage:
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self.to_screen('%s: Successfully enrolled in the course' % course_id)
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def _download_lecture(self, course_id, lecture_id):
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return self._download_json(
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'https://www.udemy.com/api-2.0/users/me/subscribed-courses/%s/lectures/%s?'
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% (course_id, lecture_id),
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lecture_id, 'Downloading lecture JSON', query={
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'fields[lecture]': 'title,description,view_html,asset',
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'fields[asset]': 'asset_type,stream_url,thumbnail_url,download_urls,data',
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})
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def _handle_error(self, response):
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if not isinstance(response, dict):
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return
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error = response.get('error')
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if error:
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error_str = 'Udemy returned error #%s: %s' % (error.get('code'), error.get('message'))
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error_data = error.get('data')
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if error_data:
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error_str += ' - %s' % error_data.get('formErrors')
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raise ExtractorError(error_str, expected=True)
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def _download_json(self, url_or_request, *args, **kwargs):
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headers = {
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'X-Udemy-Snail-Case': 'true',
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'X-Requested-With': 'XMLHttpRequest',
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}
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for cookie in self._downloader.cookiejar:
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if cookie.name == 'client_id':
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headers['X-Udemy-Client-Id'] = cookie.value
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elif cookie.name == 'access_token':
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headers['X-Udemy-Bearer-Token'] = cookie.value
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headers['X-Udemy-Authorization'] = 'Bearer %s' % cookie.value
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if isinstance(url_or_request, compat_urllib_request.Request):
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for header, value in headers.items():
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url_or_request.add_header(header, value)
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else:
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url_or_request = sanitized_Request(url_or_request, headers=headers)
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response = super(UdemyIE, self)._download_json(url_or_request, *args, **kwargs)
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self._handle_error(response)
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return response
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def _real_initialize(self):
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self._login()
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def _login(self):
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(username, password) = self._get_login_info()
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if username is None:
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return
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login_popup = self._download_webpage(
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self._LOGIN_URL, None, 'Downloading login popup')
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def is_logged(webpage):
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return any(p in webpage for p in ['href="https://www.udemy.com/user/logout/', '>Logout<'])
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# already logged in
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if is_logged(login_popup):
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return
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login_form = self._form_hidden_inputs('login-form', login_popup)
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login_form.update({
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'email': username,
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'password': password,
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})
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response = self._download_webpage(
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self._LOGIN_URL, None, 'Logging in as %s' % username,
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data=urlencode_postdata(login_form),
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headers={
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'Referer': self._ORIGIN_URL,
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'Origin': self._ORIGIN_URL,
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})
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if not is_logged(response):
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error = self._html_search_regex(
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r'(?s)<div[^>]+class="form-errors[^"]*">(.+?)</div>',
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response, 'error message', default=None)
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if error:
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raise ExtractorError('Unable to login: %s' % error, expected=True)
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raise ExtractorError('Unable to log in')
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def _real_extract(self, url):
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lecture_id = self._match_id(url)
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webpage = self._download_webpage(url, lecture_id)
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course_id, _ = self._extract_course_info(webpage, lecture_id)
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try:
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lecture = self._download_lecture(course_id, lecture_id)
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except ExtractorError as e:
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# Error could possibly mean we are not enrolled in the course
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if isinstance(e.cause, compat_HTTPError) and e.cause.code == 403:
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self._enroll_course(url, webpage, course_id)
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lecture = self._download_lecture(course_id, lecture_id)
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else:
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raise
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title = lecture['title']
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description = lecture.get('description')
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asset = lecture['asset']
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asset_type = asset.get('asset_type') or asset.get('assetType')
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if asset_type != 'Video':
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raise ExtractorError(
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'Lecture %s is not a video' % lecture_id, expected=True)
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stream_url = asset.get('stream_url') or asset.get('streamUrl')
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if stream_url:
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youtube_url = self._search_regex(
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r'(https?://www\.youtube\.com/watch\?v=.*)', stream_url, 'youtube URL', default=None)
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if youtube_url:
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return self.url_result(youtube_url, 'Youtube')
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video_id = asset['id']
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thumbnail = asset.get('thumbnail_url') or asset.get('thumbnailUrl')
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duration = float_or_none(asset.get('data', {}).get('duration'))
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formats = []
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def extract_output_format(src):
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return {
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'url': src['url'],
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'format_id': '%sp' % (src.get('height') or format_id),
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'width': int_or_none(src.get('width')),
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'height': int_or_none(src.get('height')),
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'vbr': int_or_none(src.get('video_bitrate_in_kbps')),
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'vcodec': src.get('video_codec'),
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'fps': int_or_none(src.get('frame_rate')),
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'abr': int_or_none(src.get('audio_bitrate_in_kbps')),
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'acodec': src.get('audio_codec'),
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'asr': int_or_none(src.get('audio_sample_rate')),
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'tbr': int_or_none(src.get('total_bitrate_in_kbps')),
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'filesize': int_or_none(src.get('file_size_in_bytes')),
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}
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outputs = asset.get('data', {}).get('outputs')
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if not isinstance(outputs, dict):
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outputs = {}
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def add_output_format_meta(f, key):
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output = outputs.get(key)
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if isinstance(output, dict):
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output_format = extract_output_format(output)
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output_format.update(f)
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return output_format
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return f
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download_urls = asset.get('download_urls')
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if isinstance(download_urls, dict):
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video = download_urls.get('Video')
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if isinstance(video, list):
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for format_ in video:
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video_url = format_.get('file')
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if not video_url:
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continue
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format_id = format_.get('label')
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f = {
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'url': format_['file'],
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'format_id': '%sp' % format_id,
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'height': int_or_none(format_id),
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}
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if format_id:
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# Some videos contain additional metadata (e.g.
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# https://www.udemy.com/ios9-swift/learn/#/lecture/3383208)
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f = add_output_format_meta(f, format_id)
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formats.append(f)
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view_html = lecture.get('view_html')
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if view_html:
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view_html_urls = set()
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for source in re.findall(r'<source[^>]+>', view_html):
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attributes = extract_attributes(source)
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src = attributes.get('src')
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if not src:
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continue
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res = attributes.get('data-res')
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height = int_or_none(res)
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if src in view_html_urls:
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continue
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view_html_urls.add(src)
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if attributes.get('type') == 'application/x-mpegURL' or determine_ext(src) == 'm3u8':
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m3u8_formats = self._extract_m3u8_formats(
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src, video_id, 'mp4', entry_protocol='m3u8_native',
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m3u8_id='hls', fatal=False)
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for f in m3u8_formats:
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m = re.search(r'/hls_(?P<height>\d{3,4})_(?P<tbr>\d{2,})/', f['url'])
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if m:
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if not f.get('height'):
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f['height'] = int(m.group('height'))
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if not f.get('tbr'):
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f['tbr'] = int(m.group('tbr'))
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formats.extend(m3u8_formats)
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else:
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formats.append(add_output_format_meta({
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'url': src,
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'format_id': '%dp' % height if height else None,
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'height': height,
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}, res))
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self._sort_formats(formats, field_preference=('height', 'width', 'tbr', 'format_id'))
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return {
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'id': video_id,
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'title': title,
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'description': description,
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'thumbnail': thumbnail,
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'duration': duration,
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'formats': formats
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}
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class UdemyCourseIE(UdemyIE):
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IE_NAME = 'udemy:course'
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_VALID_URL = r'https?://www\.udemy\.com/(?P<id>[^/?#&]+)'
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_TESTS = []
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@classmethod
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def suitable(cls, url):
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return False if UdemyIE.suitable(url) else super(UdemyCourseIE, cls).suitable(url)
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def _real_extract(self, url):
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course_path = self._match_id(url)
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webpage = self._download_webpage(url, course_path)
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course_id, title = self._extract_course_info(webpage, course_path)
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self._enroll_course(url, webpage, course_id)
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response = self._download_json(
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'https://www.udemy.com/api-2.0/courses/%s/cached-subscriber-curriculum-items' % course_id,
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course_id, 'Downloading course curriculum', query={
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'fields[chapter]': 'title,object_index',
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'fields[lecture]': 'title,asset',
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'page_size': '1000',
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})
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entries = []
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chapter, chapter_number = [None] * 2
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for entry in response['results']:
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clazz = entry.get('_class')
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if clazz == 'lecture':
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asset = entry.get('asset')
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if isinstance(asset, dict):
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asset_type = asset.get('asset_type') or asset.get('assetType')
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if asset_type != 'Video':
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continue
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lecture_id = entry.get('id')
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if lecture_id:
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entry = {
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'_type': 'url_transparent',
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'url': 'https://www.udemy.com/%s/learn/v4/t/lecture/%s' % (course_path, entry['id']),
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'title': entry.get('title'),
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'ie_key': UdemyIE.ie_key(),
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}
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if chapter_number:
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entry['chapter_number'] = chapter_number
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if chapter:
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entry['chapter'] = chapter
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entries.append(entry)
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elif clazz == 'chapter':
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chapter_number = entry.get('object_index')
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chapter = entry.get('title')
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return self.playlist_result(entries, course_id, title)
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