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Diffstat (limited to 'yt_dlp/extractor/lynda.py')
| -rw-r--r-- | yt_dlp/extractor/lynda.py | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/yt_dlp/extractor/lynda.py b/yt_dlp/extractor/lynda.py new file mode 100644 index 0000000..768ce91 --- /dev/null +++ b/yt_dlp/extractor/lynda.py @@ -0,0 +1,330 @@ +import re + +from .common import InfoExtractor +from ..compat import ( + compat_str, + compat_urlparse, +) +from ..utils import ( + ExtractorError, + int_or_none, + urlencode_postdata, +) + + +class LyndaBaseIE(InfoExtractor): + _SIGNIN_URL = 'https://www.lynda.com/signin/lynda' + _PASSWORD_URL = 'https://www.lynda.com/signin/password' + _USER_URL = 'https://www.lynda.com/signin/user' + _ACCOUNT_CREDENTIALS_HINT = 'Use --username and --password options to provide lynda.com account credentials.' + _NETRC_MACHINE = 'lynda' + + @staticmethod + def _check_error(json_string, key_or_keys): + keys = [key_or_keys] if isinstance(key_or_keys, compat_str) else key_or_keys + for key in keys: + error = json_string.get(key) + if error: + raise ExtractorError('Unable to login: %s' % error, expected=True) + + def _perform_login_step(self, form_html, fallback_action_url, extra_form_data, note, referrer_url): + action_url = self._search_regex( + r'<form[^>]+action=(["\'])(?P<url>.+?)\1', form_html, + 'post url', default=fallback_action_url, group='url') + + if not action_url.startswith('http'): + action_url = compat_urlparse.urljoin(self._SIGNIN_URL, action_url) + + form_data = self._hidden_inputs(form_html) + form_data.update(extra_form_data) + + response = self._download_json( + action_url, None, note, + data=urlencode_postdata(form_data), + headers={ + 'Referer': referrer_url, + 'X-Requested-With': 'XMLHttpRequest', + }, expected_status=(418, 500, )) + + self._check_error(response, ('email', 'password', 'ErrorMessage')) + + return response, action_url + + def _perform_login(self, username, password): + # Step 1: download signin page + signin_page = self._download_webpage( + self._SIGNIN_URL, None, 'Downloading signin page') + + # Already logged in + if any(re.search(p, signin_page) for p in ( + r'isLoggedIn\s*:\s*true', r'logout\.aspx', r'>Log out<')): + return + + # Step 2: submit email + signin_form = self._search_regex( + r'(?s)(<form[^>]+data-form-name=["\']signin["\'][^>]*>.+?</form>)', + signin_page, 'signin form') + signin_page, signin_url = self._login_step( + signin_form, self._PASSWORD_URL, {'email': username}, + 'Submitting email', self._SIGNIN_URL) + + # Step 3: submit password + password_form = signin_page['body'] + self._login_step( + password_form, self._USER_URL, {'email': username, 'password': password}, + 'Submitting password', signin_url) + + +class LyndaIE(LyndaBaseIE): + IE_NAME = 'lynda' + IE_DESC = 'lynda.com videos' + _VALID_URL = r'''(?x) + https?:// + (?:www\.)?(?:lynda\.com|educourse\.ga)/ + (?: + (?:[^/]+/){2,3}(?P<course_id>\d+)| + player/embed + )/ + (?P<id>\d+) + ''' + + _TIMECODE_REGEX = r'\[(?P<timecode>\d+:\d+:\d+[\.,]\d+)\]' + + _TESTS = [{ + 'url': 'https://www.lynda.com/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html', + # md5 is unstable + 'info_dict': { + 'id': '114408', + 'ext': 'mp4', + 'title': 'Using the exercise files', + 'duration': 68 + } + }, { + 'url': 'https://www.lynda.com/player/embed/133770?tr=foo=1;bar=g;fizz=rt&fs=0', + 'only_matching': True, + }, { + 'url': 'https://educourse.ga/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html', + 'only_matching': True, + }, { + 'url': 'https://www.lynda.com/de/Graphic-Design-tutorials/Willkommen-Grundlagen-guten-Gestaltung/393570/393572-4.html', + 'only_matching': True, + }, { + # Status="NotFound", Message="Transcript not found" + 'url': 'https://www.lynda.com/ASP-NET-tutorials/What-you-should-know/5034180/2811512-4.html', + 'only_matching': True, + }] + + def _raise_unavailable(self, video_id): + self.raise_login_required( + 'Video %s is only available for members' % video_id) + + def _real_extract(self, url): + mobj = self._match_valid_url(url) + video_id = mobj.group('id') + course_id = mobj.group('course_id') + + query = { + 'videoId': video_id, + 'type': 'video', + } + + video = self._download_json( + 'https://www.lynda.com/ajax/player', video_id, + 'Downloading video JSON', fatal=False, query=query) + + # Fallback scenario + if not video: + query['courseId'] = course_id + + play = self._download_json( + 'https://www.lynda.com/ajax/course/%s/%s/play' + % (course_id, video_id), video_id, 'Downloading play JSON') + + if not play: + self._raise_unavailable(video_id) + + formats = [] + for formats_dict in play: + urls = formats_dict.get('urls') + if not isinstance(urls, dict): + continue + cdn = formats_dict.get('name') + for format_id, format_url in urls.items(): + if not format_url: + continue + formats.append({ + 'url': format_url, + 'format_id': '%s-%s' % (cdn, format_id) if cdn else format_id, + 'height': int_or_none(format_id), + }) + + conviva = self._download_json( + 'https://www.lynda.com/ajax/player/conviva', video_id, + 'Downloading conviva JSON', query=query) + + return { + 'id': video_id, + 'title': conviva['VideoTitle'], + 'description': conviva.get('VideoDescription'), + 'release_year': int_or_none(conviva.get('ReleaseYear')), + 'duration': int_or_none(conviva.get('Duration')), + 'creator': conviva.get('Author'), + 'formats': formats, + } + + if 'Status' in video: + raise ExtractorError( + 'lynda returned error: %s' % video['Message'], expected=True) + + if video.get('HasAccess') is False: + self._raise_unavailable(video_id) + + video_id = compat_str(video.get('ID') or video_id) + duration = int_or_none(video.get('DurationInSeconds')) + title = video['Title'] + + formats = [] + + fmts = video.get('Formats') + if fmts: + formats.extend([{ + 'url': f['Url'], + 'ext': f.get('Extension'), + 'width': int_or_none(f.get('Width')), + 'height': int_or_none(f.get('Height')), + 'filesize': int_or_none(f.get('FileSize')), + 'format_id': compat_str(f.get('Resolution')) if f.get('Resolution') else None, + } for f in fmts if f.get('Url')]) + + prioritized_streams = video.get('PrioritizedStreams') + if prioritized_streams: + for prioritized_stream_id, prioritized_stream in prioritized_streams.items(): + formats.extend([{ + 'url': video_url, + 'height': int_or_none(format_id), + 'format_id': '%s-%s' % (prioritized_stream_id, format_id), + } for format_id, video_url in prioritized_stream.items()]) + + self._check_formats(formats, video_id) + + subtitles = self.extract_subtitles(video_id) + + return { + 'id': video_id, + 'title': title, + 'duration': duration, + 'subtitles': subtitles, + 'formats': formats + } + + def _fix_subtitles(self, subs): + srt = '' + seq_counter = 0 + for pos in range(0, len(subs) - 1): + seq_current = subs[pos] + m_current = re.match(self._TIMECODE_REGEX, seq_current['Timecode']) + if m_current is None: + continue + seq_next = subs[pos + 1] + m_next = re.match(self._TIMECODE_REGEX, seq_next['Timecode']) + if m_next is None: + continue + appear_time = m_current.group('timecode') + disappear_time = m_next.group('timecode') + text = seq_current['Caption'].strip() + if text: + seq_counter += 1 + srt += '%s\r\n%s --> %s\r\n%s\r\n\r\n' % (seq_counter, appear_time, disappear_time, text) + if srt: + return srt + + def _get_subtitles(self, video_id): + url = 'https://www.lynda.com/ajax/player?videoId=%s&type=transcript' % video_id + subs = self._download_webpage( + url, video_id, 'Downloading subtitles JSON', fatal=False) + if not subs or 'Status="NotFound"' in subs: + return {} + subs = self._parse_json(subs, video_id, fatal=False) + if not subs: + return {} + fixed_subs = self._fix_subtitles(subs) + if fixed_subs: + return {'en': [{'ext': 'srt', 'data': fixed_subs}]} + return {} + + +class LyndaCourseIE(LyndaBaseIE): + IE_NAME = 'lynda:course' + IE_DESC = 'lynda.com online courses' + + # Course link equals to welcome/introduction video link of same course + # We will recognize it as course link + _VALID_URL = r'https?://(?:www|m)\.(?:lynda\.com|educourse\.ga)/(?P<coursepath>(?:[^/]+/){2,3}(?P<courseid>\d+))-2\.html' + + _TESTS = [{ + 'url': 'https://www.lynda.com/Graphic-Design-tutorials/Grundlagen-guten-Gestaltung/393570-2.html', + 'only_matching': True, + }, { + 'url': 'https://www.lynda.com/de/Graphic-Design-tutorials/Grundlagen-guten-Gestaltung/393570-2.html', + 'only_matching': True, + }] + + def _real_extract(self, url): + mobj = self._match_valid_url(url) + course_path = mobj.group('coursepath') + course_id = mobj.group('courseid') + + item_template = 'https://www.lynda.com/%s/%%s-4.html' % course_path + + course = self._download_json( + 'https://www.lynda.com/ajax/player?courseId=%s&type=course' % course_id, + course_id, 'Downloading course JSON', fatal=False) + + if not course: + webpage = self._download_webpage(url, course_id) + entries = [ + self.url_result( + item_template % video_id, ie=LyndaIE.ie_key(), + video_id=video_id) + for video_id in re.findall( + r'data-video-id=["\'](\d+)', webpage)] + return self.playlist_result( + entries, course_id, + self._og_search_title(webpage, fatal=False), + self._og_search_description(webpage)) + + if course.get('Status') == 'NotFound': + raise ExtractorError( + 'Course %s does not exist' % course_id, expected=True) + + unaccessible_videos = 0 + entries = [] + + # Might want to extract videos right here from video['Formats'] as it seems 'Formats' is not provided + # by single video API anymore + + for chapter in course['Chapters']: + for video in chapter.get('Videos', []): + if video.get('HasAccess') is False: + unaccessible_videos += 1 + continue + video_id = video.get('ID') + if video_id: + entries.append({ + '_type': 'url_transparent', + 'url': item_template % video_id, + 'ie_key': LyndaIE.ie_key(), + 'chapter': chapter.get('Title'), + 'chapter_number': int_or_none(chapter.get('ChapterIndex')), + 'chapter_id': compat_str(chapter.get('ID')), + }) + + if unaccessible_videos > 0: + self.report_warning( + '%s videos are only available for members (or paid members) and will not be downloaded. ' + % unaccessible_videos + self._ACCOUNT_CREDENTIALS_HINT) + + course_title = course.get('Title') + course_description = course.get('Description') + + return self.playlist_result(entries, course_id, course_title, course_description) |