mirror of https://github.com/yt-dlp/yt-dlp
[udemy] Initial support for free courses (#1617)
Sergey M․
11 years ago
parent
2a1db721d4
commit
e5de3f6c89
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from __future__ import unicode_literals
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import re
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from .common import InfoExtractor
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from ..utils import (
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compat_urllib_parse,
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compat_urllib_request,
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ExtractorError,
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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'https?://www\.udemy\.com/(?:[^#]+#/lecture/|lecture/view/?\?lectureId=)(?P<id>\d+)'
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_LOGIN_URL = 'https://www.udemy.com/join/login-submit/'
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_NETRC_MACHINE = 'udemy'
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_TEST = {
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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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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, video_id, note='Downloading JSON metadata'):
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response = super(UdemyIE, self)._download_json(url, video_id, note)
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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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raise ExtractorError(
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'Udemy account is required, use --username and --password options to provide account credentials.',
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expected=True)
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login_popup = self._download_webpage(
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'https://www.udemy.com/join/login-popup?displayType=ajax&showSkipButton=1', None,
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'Downloading login popup')
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if login_popup == '<div class="run-command close-popup redirect" data-url="https://www.udemy.com/"></div>':
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return
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csrf = self._html_search_regex(r'<input type="hidden" name="csrf" value="(.+?)"', login_popup, 'csrf token')
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login_form = {
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'email': username,
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'password': password,
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'csrf': csrf,
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'displayType': 'json',
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'isSubmitted': '1',
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}
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request = compat_urllib_request.Request(self._LOGIN_URL, compat_urllib_parse.urlencode(login_form))
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response = self._download_json(request, None, 'Logging in as %s' % username)
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if 'returnUrl' not in response:
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raise ExtractorError('Unable to log in')
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def _real_extract(self, url):
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mobj = re.match(self._VALID_URL, url)
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lecture_id = mobj.group('id')
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lecture = self._download_json(
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'https://www.udemy.com/api-1.1/lectures/%s' % lecture_id, lecture_id, 'Downloading lecture JSON')
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if lecture['assetType'] != 'Video':
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raise ExtractorError('Lecture %s is not a video' % lecture_id, expected=True)
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asset = lecture['asset']
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stream_url = asset['streamUrl']
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mobj = re.search(r'(https?://www\.youtube\.com/watch\?v=.*)', stream_url)
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if mobj:
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return self.url_result(mobj.group(1), 'Youtube')
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video_id = asset['id']
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thumbnail = asset['thumbnailUrl']
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duration = asset['data']['duration']
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download_url = asset['downloadUrl']
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formats = [
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{
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'url': download_url['Video480p'][0],
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'format_id': '360p',
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},
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{
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'url': download_url['Video'][0],
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'format_id': '720p',
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},
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]
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title = lecture['title']
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description = lecture['description']
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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<coursepath>[\da-z-]+)'
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_SUCCESSFULLY_ENROLLED = '>You have enrolled in this course!<'
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_ALREADY_ENROLLED = '>You are already taking this course.<'
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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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mobj = re.match(self._VALID_URL, url)
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course_path = mobj.group('coursepath')
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response = self._download_json(
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'https://www.udemy.com/api-1.1/courses/%s' % course_path, course_path, 'Downloading course JSON')
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course_id = int(response['id'])
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course_title = response['title']
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webpage = self._download_webpage(
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'https://www.udemy.com/course/subscribe/?courseId=%s' % course_id, course_id, 'Enrolling in the course')
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if self._SUCCESSFULLY_ENROLLED in webpage:
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self.to_screen('%s: Successfully enrolled in' % course_id)
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elif self._ALREADY_ENROLLED in webpage:
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self.to_screen('%s: Already enrolled in' % course_id)
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response = self._download_json('https://www.udemy.com/api-1.1/courses/%s/curriculum' % course_id,
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course_id, 'Downloading course curriculum')
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entries = [
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self.url_result('https://www.udemy.com/%s/#/lecture/%s' % (course_path, asset['id']), 'Udemy')
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for asset in response if asset.get('assetType') == 'Video'
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]
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return self.playlist_result(entries, course_id, course_title)
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