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Diffstat (limited to 'yt_dlp/extractor/udemy.py')
| -rw-r--r-- | yt_dlp/extractor/udemy.py | 475 |
1 files changed, 475 insertions, 0 deletions
diff --git a/yt_dlp/extractor/udemy.py b/yt_dlp/extractor/udemy.py new file mode 100644 index 0000000..329e5da --- /dev/null +++ b/yt_dlp/extractor/udemy.py @@ -0,0 +1,475 @@ +import re +import urllib.request + +from .common import InfoExtractor +from ..compat import compat_HTTPError, compat_str, compat_urlparse +from ..utils import ( + ExtractorError, + determine_ext, + extract_attributes, + float_or_none, + int_or_none, + js_to_json, + sanitized_Request, + smuggle_url, + try_get, + unescapeHTML, + unsmuggle_url, + 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'"courseId"\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,course_is_drmed', + }) + + 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, **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 ' + 'yt-dlp 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.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, 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 _perform_login(self, username, password): + 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) + course_id = unsmuggle_url(url, {})[1].get('course_id') + + webpage = None + if not course_id: + 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: + webpage = webpage or self._download_webpage(url, lecture_id) + 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) + + if not formats and asset.get('course_is_drmed'): + self.report_drm(video_id) + + return { + 'id': video_id, + 'title': title, + 'description': description, + 'thumbnail': thumbnail, + 'duration': duration, + 'formats': formats, + 'subtitles': subtitles, + 'automatic_captions': automatic_captions, + } + + +class UdemyCourseIE(UdemyIE): # XXX: Do not subclass from concrete IE + 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': smuggle_url( + f'https://www.udemy.com/{course_path}/learn/v4/t/lecture/{entry["id"]}', + {'course_id': course_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) |