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359 lines
14 KiB
359 lines
14 KiB
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_parse_urlencode, |
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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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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?%s' % ( |
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course_id, lecture_id, compat_urllib_parse_urlencode({ |
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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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lecture_id, 'Downloading lecture JSON') |
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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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request = sanitized_Request( |
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self._LOGIN_URL, urlencode_postdata(login_form)) |
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request.add_header('Referer', self._ORIGIN_URL) |
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request.add_header('Origin', self._ORIGIN_URL) |
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response = self._download_webpage( |
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request, None, 'Logging in as %s' % username) |
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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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