youtube-dl

Another place where youtube-dl lives on
git clone git://git.oshgnacknak.de/youtube-dl.git
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lynda.py (12703B)

      1 from __future__ import unicode_literals
      2 
      3 import re
      4 
      5 from .common import InfoExtractor
      6 from ..compat import (
      7     compat_str,
      8     compat_urlparse,
      9 )
     10 from ..utils import (
     11     ExtractorError,
     12     int_or_none,
     13     urlencode_postdata,
     14 )
     15 
     16 
     17 class LyndaBaseIE(InfoExtractor):
     18     _SIGNIN_URL = 'https://www.lynda.com/signin/lynda'
     19     _PASSWORD_URL = 'https://www.lynda.com/signin/password'
     20     _USER_URL = 'https://www.lynda.com/signin/user'
     21     _ACCOUNT_CREDENTIALS_HINT = 'Use --username and --password options to provide lynda.com account credentials.'
     22     _NETRC_MACHINE = 'lynda'
     23 
     24     def _real_initialize(self):
     25         self._login()
     26 
     27     @staticmethod
     28     def _check_error(json_string, key_or_keys):
     29         keys = [key_or_keys] if isinstance(key_or_keys, compat_str) else key_or_keys
     30         for key in keys:
     31             error = json_string.get(key)
     32             if error:
     33                 raise ExtractorError('Unable to login: %s' % error, expected=True)
     34 
     35     def _login_step(self, form_html, fallback_action_url, extra_form_data, note, referrer_url):
     36         action_url = self._search_regex(
     37             r'<form[^>]+action=(["\'])(?P<url>.+?)\1', form_html,
     38             'post url', default=fallback_action_url, group='url')
     39 
     40         if not action_url.startswith('http'):
     41             action_url = compat_urlparse.urljoin(self._SIGNIN_URL, action_url)
     42 
     43         form_data = self._hidden_inputs(form_html)
     44         form_data.update(extra_form_data)
     45 
     46         response = self._download_json(
     47             action_url, None, note,
     48             data=urlencode_postdata(form_data),
     49             headers={
     50                 'Referer': referrer_url,
     51                 'X-Requested-With': 'XMLHttpRequest',
     52             }, expected_status=(418, 500, ))
     53 
     54         self._check_error(response, ('email', 'password', 'ErrorMessage'))
     55 
     56         return response, action_url
     57 
     58     def _login(self):
     59         username, password = self._get_login_info()
     60         if username is None:
     61             return
     62 
     63         # Step 1: download signin page
     64         signin_page = self._download_webpage(
     65             self._SIGNIN_URL, None, 'Downloading signin page')
     66 
     67         # Already logged in
     68         if any(re.search(p, signin_page) for p in (
     69                 r'isLoggedIn\s*:\s*true', r'logout\.aspx', r'>Log out<')):
     70             return
     71 
     72         # Step 2: submit email
     73         signin_form = self._search_regex(
     74             r'(?s)(<form[^>]+data-form-name=["\']signin["\'][^>]*>.+?</form>)',
     75             signin_page, 'signin form')
     76         signin_page, signin_url = self._login_step(
     77             signin_form, self._PASSWORD_URL, {'email': username},
     78             'Submitting email', self._SIGNIN_URL)
     79 
     80         # Step 3: submit password
     81         password_form = signin_page['body']
     82         self._login_step(
     83             password_form, self._USER_URL, {'email': username, 'password': password},
     84             'Submitting password', signin_url)
     85 
     86 
     87 class LyndaIE(LyndaBaseIE):
     88     IE_NAME = 'lynda'
     89     IE_DESC = 'lynda.com videos'
     90     _VALID_URL = r'''(?x)
     91                     https?://
     92                         (?:www\.)?(?:lynda\.com|educourse\.ga)/
     93                         (?:
     94                             (?:[^/]+/){2,3}(?P<course_id>\d+)|
     95                             player/embed
     96                         )/
     97                         (?P<id>\d+)
     98                     '''
     99 
    100     _TIMECODE_REGEX = r'\[(?P<timecode>\d+:\d+:\d+[\.,]\d+)\]'
    101 
    102     _TESTS = [{
    103         'url': 'https://www.lynda.com/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html',
    104         # md5 is unstable
    105         'info_dict': {
    106             'id': '114408',
    107             'ext': 'mp4',
    108             'title': 'Using the exercise files',
    109             'duration': 68
    110         }
    111     }, {
    112         'url': 'https://www.lynda.com/player/embed/133770?tr=foo=1;bar=g;fizz=rt&fs=0',
    113         'only_matching': True,
    114     }, {
    115         'url': 'https://educourse.ga/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html',
    116         'only_matching': True,
    117     }, {
    118         'url': 'https://www.lynda.com/de/Graphic-Design-tutorials/Willkommen-Grundlagen-guten-Gestaltung/393570/393572-4.html',
    119         'only_matching': True,
    120     }, {
    121         # Status="NotFound", Message="Transcript not found"
    122         'url': 'https://www.lynda.com/ASP-NET-tutorials/What-you-should-know/5034180/2811512-4.html',
    123         'only_matching': True,
    124     }]
    125 
    126     def _raise_unavailable(self, video_id):
    127         self.raise_login_required(
    128             'Video %s is only available for members' % video_id)
    129 
    130     def _real_extract(self, url):
    131         mobj = re.match(self._VALID_URL, url)
    132         video_id = mobj.group('id')
    133         course_id = mobj.group('course_id')
    134 
    135         query = {
    136             'videoId': video_id,
    137             'type': 'video',
    138         }
    139 
    140         video = self._download_json(
    141             'https://www.lynda.com/ajax/player', video_id,
    142             'Downloading video JSON', fatal=False, query=query)
    143 
    144         # Fallback scenario
    145         if not video:
    146             query['courseId'] = course_id
    147 
    148             play = self._download_json(
    149                 'https://www.lynda.com/ajax/course/%s/%s/play'
    150                 % (course_id, video_id), video_id, 'Downloading play JSON')
    151 
    152             if not play:
    153                 self._raise_unavailable(video_id)
    154 
    155             formats = []
    156             for formats_dict in play:
    157                 urls = formats_dict.get('urls')
    158                 if not isinstance(urls, dict):
    159                     continue
    160                 cdn = formats_dict.get('name')
    161                 for format_id, format_url in urls.items():
    162                     if not format_url:
    163                         continue
    164                     formats.append({
    165                         'url': format_url,
    166                         'format_id': '%s-%s' % (cdn, format_id) if cdn else format_id,
    167                         'height': int_or_none(format_id),
    168                     })
    169             self._sort_formats(formats)
    170 
    171             conviva = self._download_json(
    172                 'https://www.lynda.com/ajax/player/conviva', video_id,
    173                 'Downloading conviva JSON', query=query)
    174 
    175             return {
    176                 'id': video_id,
    177                 'title': conviva['VideoTitle'],
    178                 'description': conviva.get('VideoDescription'),
    179                 'release_year': int_or_none(conviva.get('ReleaseYear')),
    180                 'duration': int_or_none(conviva.get('Duration')),
    181                 'creator': conviva.get('Author'),
    182                 'formats': formats,
    183             }
    184 
    185         if 'Status' in video:
    186             raise ExtractorError(
    187                 'lynda returned error: %s' % video['Message'], expected=True)
    188 
    189         if video.get('HasAccess') is False:
    190             self._raise_unavailable(video_id)
    191 
    192         video_id = compat_str(video.get('ID') or video_id)
    193         duration = int_or_none(video.get('DurationInSeconds'))
    194         title = video['Title']
    195 
    196         formats = []
    197 
    198         fmts = video.get('Formats')
    199         if fmts:
    200             formats.extend([{
    201                 'url': f['Url'],
    202                 'ext': f.get('Extension'),
    203                 'width': int_or_none(f.get('Width')),
    204                 'height': int_or_none(f.get('Height')),
    205                 'filesize': int_or_none(f.get('FileSize')),
    206                 'format_id': compat_str(f.get('Resolution')) if f.get('Resolution') else None,
    207             } for f in fmts if f.get('Url')])
    208 
    209         prioritized_streams = video.get('PrioritizedStreams')
    210         if prioritized_streams:
    211             for prioritized_stream_id, prioritized_stream in prioritized_streams.items():
    212                 formats.extend([{
    213                     'url': video_url,
    214                     'height': int_or_none(format_id),
    215                     'format_id': '%s-%s' % (prioritized_stream_id, format_id),
    216                 } for format_id, video_url in prioritized_stream.items()])
    217 
    218         self._check_formats(formats, video_id)
    219         self._sort_formats(formats)
    220 
    221         subtitles = self.extract_subtitles(video_id)
    222 
    223         return {
    224             'id': video_id,
    225             'title': title,
    226             'duration': duration,
    227             'subtitles': subtitles,
    228             'formats': formats
    229         }
    230 
    231     def _fix_subtitles(self, subs):
    232         srt = ''
    233         seq_counter = 0
    234         for pos in range(0, len(subs) - 1):
    235             seq_current = subs[pos]
    236             m_current = re.match(self._TIMECODE_REGEX, seq_current['Timecode'])
    237             if m_current is None:
    238                 continue
    239             seq_next = subs[pos + 1]
    240             m_next = re.match(self._TIMECODE_REGEX, seq_next['Timecode'])
    241             if m_next is None:
    242                 continue
    243             appear_time = m_current.group('timecode')
    244             disappear_time = m_next.group('timecode')
    245             text = seq_current['Caption'].strip()
    246             if text:
    247                 seq_counter += 1
    248                 srt += '%s\r\n%s --> %s\r\n%s\r\n\r\n' % (seq_counter, appear_time, disappear_time, text)
    249         if srt:
    250             return srt
    251 
    252     def _get_subtitles(self, video_id):
    253         url = 'https://www.lynda.com/ajax/player?videoId=%s&type=transcript' % video_id
    254         subs = self._download_webpage(
    255             url, video_id, 'Downloading subtitles JSON', fatal=False)
    256         if not subs or 'Status="NotFound"' in subs:
    257             return {}
    258         subs = self._parse_json(subs, video_id, fatal=False)
    259         if not subs:
    260             return {}
    261         fixed_subs = self._fix_subtitles(subs)
    262         if fixed_subs:
    263             return {'en': [{'ext': 'srt', 'data': fixed_subs}]}
    264         return {}
    265 
    266 
    267 class LyndaCourseIE(LyndaBaseIE):
    268     IE_NAME = 'lynda:course'
    269     IE_DESC = 'lynda.com online courses'
    270 
    271     # Course link equals to welcome/introduction video link of same course
    272     # We will recognize it as course link
    273     _VALID_URL = r'https?://(?:www|m)\.(?:lynda\.com|educourse\.ga)/(?P<coursepath>(?:[^/]+/){2,3}(?P<courseid>\d+))-2\.html'
    274 
    275     _TESTS = [{
    276         'url': 'https://www.lynda.com/Graphic-Design-tutorials/Grundlagen-guten-Gestaltung/393570-2.html',
    277         'only_matching': True,
    278     }, {
    279         'url': 'https://www.lynda.com/de/Graphic-Design-tutorials/Grundlagen-guten-Gestaltung/393570-2.html',
    280         'only_matching': True,
    281     }]
    282 
    283     def _real_extract(self, url):
    284         mobj = re.match(self._VALID_URL, url)
    285         course_path = mobj.group('coursepath')
    286         course_id = mobj.group('courseid')
    287 
    288         item_template = 'https://www.lynda.com/%s/%%s-4.html' % course_path
    289 
    290         course = self._download_json(
    291             'https://www.lynda.com/ajax/player?courseId=%s&type=course' % course_id,
    292             course_id, 'Downloading course JSON', fatal=False)
    293 
    294         if not course:
    295             webpage = self._download_webpage(url, course_id)
    296             entries = [
    297                 self.url_result(
    298                     item_template % video_id, ie=LyndaIE.ie_key(),
    299                     video_id=video_id)
    300                 for video_id in re.findall(
    301                     r'data-video-id=["\'](\d+)', webpage)]
    302             return self.playlist_result(
    303                 entries, course_id,
    304                 self._og_search_title(webpage, fatal=False),
    305                 self._og_search_description(webpage))
    306 
    307         if course.get('Status') == 'NotFound':
    308             raise ExtractorError(
    309                 'Course %s does not exist' % course_id, expected=True)
    310 
    311         unaccessible_videos = 0
    312         entries = []
    313 
    314         # Might want to extract videos right here from video['Formats'] as it seems 'Formats' is not provided
    315         # by single video API anymore
    316 
    317         for chapter in course['Chapters']:
    318             for video in chapter.get('Videos', []):
    319                 if video.get('HasAccess') is False:
    320                     unaccessible_videos += 1
    321                     continue
    322                 video_id = video.get('ID')
    323                 if video_id:
    324                     entries.append({
    325                         '_type': 'url_transparent',
    326                         'url': item_template % video_id,
    327                         'ie_key': LyndaIE.ie_key(),
    328                         'chapter': chapter.get('Title'),
    329                         'chapter_number': int_or_none(chapter.get('ChapterIndex')),
    330                         'chapter_id': compat_str(chapter.get('ID')),
    331                     })
    332 
    333         if unaccessible_videos > 0:
    334             self._downloader.report_warning(
    335                 '%s videos are only available for members (or paid members) and will not be downloaded. '
    336                 % unaccessible_videos + self._ACCOUNT_CREDENTIALS_HINT)
    337 
    338         course_title = course.get('Title')
    339         course_description = course.get('Description')
    340 
    341         return self.playlist_result(entries, course_id, course_title, course_description)