Adding upstream version 2023.03.04.upstream/2023.03.04upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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)