youtube_dl/extractor/lynda.py

   1 from __future__ import unicode_literals
   2
   3 import re
   4 import json
   5
   6 from .common import InfoExtractor
   7 from ..compat import (
   8     compat_str,
   9     compat_urllib_parse,
  10     compat_urllib_request,
  11 )
  12 from ..utils import (
  13     ExtractorError,
  14     int_or_none,
  15 )
  16
  17
  18 class LyndaIE(InfoExtractor):
  19     IE_NAME = 'lynda'
  20     IE_DESC = 'lynda.com videos'
  21     _VALID_URL = r'https?://www\.lynda\.com/[^/]+/[^/]+/\d+/(\d+)-\d\.html'
  22     _LOGIN_URL = 'https://www.lynda.com/login/login.aspx'
  23     _NETRC_MACHINE = 'lynda'
  24
  25     _SUCCESSFUL_LOGIN_REGEX = r'isLoggedIn: true'
  26     _TIMECODE_REGEX = r'\[(?P<timecode>\d+:\d+:\d+[\.,]\d+)\]'
  27
  28     ACCOUNT_CREDENTIALS_HINT = 'Use --username and --password options to provide lynda.com account credentials.'
  29
  30     _TEST = {
  31         'url': 'http://www.lynda.com/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html',
  32         'md5': 'ecfc6862da89489161fb9cd5f5a6fac1',
  33         'info_dict': {
  34             'id': '114408',
  35             'ext': 'mp4',
  36             'title': 'Using the exercise files',
  37             'duration': 68
  38         }
  39     }
  40
  41     def _real_initialize(self):
  42         self._login()
  43
  44     def _real_extract(self, url):
  45         mobj = re.match(self._VALID_URL, url)
  46         video_id = mobj.group(1)
  47
  48         page = self._download_webpage('http://www.lynda.com/ajax/player?videoId=%s&type=video' % video_id, video_id,
  49                                       'Downloading video JSON')
  50         video_json = json.loads(page)
  51
  52         if 'Status' in video_json:
  53             raise ExtractorError('lynda returned error: %s' % video_json['Message'], expected=True)
  54
  55         if video_json['HasAccess'] is False:
  56             raise ExtractorError(
  57                 'Video %s is only available for members. ' % video_id + self.ACCOUNT_CREDENTIALS_HINT, expected=True)
  58
  59         video_id = compat_str(video_json['ID'])
  60         duration = video_json['DurationInSeconds']
  61         title = video_json['Title']
  62
  63         formats = []
  64
  65         fmts = video_json.get('Formats')
  66         if fmts:
  67             formats.extend([
  68                 {
  69                     'url': fmt['Url'],
  70                     'ext': fmt['Extension'],
  71                     'width': fmt['Width'],
  72                     'height': fmt['Height'],
  73                     'filesize': fmt['FileSize'],
  74                     'format_id': str(fmt['Resolution'])
  75                 } for fmt in fmts])
  76
  77         prioritized_streams = video_json.get('PrioritizedStreams')
  78         if prioritized_streams:
  79             formats.extend([
  80                 {
  81                     'url': video_url,
  82                     'width': int_or_none(format_id),
  83                     'format_id': format_id,
  84                 } for format_id, video_url in prioritized_streams['0'].items()
  85             ])
  86
  87         self._check_formats(formats, video_id)
  88         self._sort_formats(formats)
  89
  90         subtitles = self.extract_subtitles(video_id, page)
  91
  92         return {
  93             'id': video_id,
  94             'title': title,
  95             'duration': duration,
  96             'subtitles': subtitles,
  97             'formats': formats
  98         }
  99
 100     def _login(self):
 101         (username, password) = self._get_login_info()
 102         if username is None:
 103             return
 104
 105         login_form = {
 106             'username': username,
 107             'password': password,
 108             'remember': 'false',
 109             'stayPut': 'false'
 110         }
 111         request = compat_urllib_request.Request(self._LOGIN_URL, compat_urllib_parse.urlencode(login_form))
 112         login_page = self._download_webpage(request, None, 'Logging in as %s' % username)
 113
 114         # Not (yet) logged in
 115         m = re.search(r'loginResultJson = \'(?P<json>[^\']+)\';', login_page)
 116         if m is not None:
 117             response = m.group('json')
 118             response_json = json.loads(response)
 119             state = response_json['state']
 120
 121             if state == 'notlogged':
 122                 raise ExtractorError('Unable to login, incorrect username and/or password', expected=True)
 123
 124             # This is when we get popup:
 125             # > You're already logged in to lynda.com on two devices.
 126             # > If you log in here, we'll log you out of another device.
 127             # So, we need to confirm this.
 128             if state == 'conflicted':
 129                 confirm_form = {
 130                     'username': '',
 131                     'password': '',
 132                     'resolve': 'true',
 133                     'remember': 'false',
 134                     'stayPut': 'false',
 135                 }
 136                 request = compat_urllib_request.Request(self._LOGIN_URL, compat_urllib_parse.urlencode(confirm_form))
 137                 login_page = self._download_webpage(request, None, 'Confirming log in and log out from another device')
 138
 139         if re.search(self._SUCCESSFUL_LOGIN_REGEX, login_page) is None:
 140             raise ExtractorError('Unable to log in')
 141
 142     def _fix_subtitles(self, subs):
 143         srt = ''
 144         for pos in range(0, len(subs) - 1):
 145             seq_current = subs[pos]
 146             m_current = re.match(self._TIMECODE_REGEX, seq_current['Timecode'])
 147             if m_current is None:
 148                 continue
 149             seq_next = subs[pos + 1]
 150             m_next = re.match(self._TIMECODE_REGEX, seq_next['Timecode'])
 151             if m_next is None:
 152                 continue
 153             appear_time = m_current.group('timecode')
 154             disappear_time = m_next.group('timecode')
 155             text = seq_current['Caption'].strip()
 156             srt += '%s\r\n%s --> %s\r\n%s' % (str(pos), appear_time, disappear_time, text)
 157         if srt:
 158             return srt
 159
 160     def _get_subtitles(self, video_id, webpage):
 161         url = 'http://www.lynda.com/ajax/player?videoId=%s&type=transcript' % video_id
 162         subs = self._download_json(url, None, False)
 163         if subs:
 164             return {'en': [{'ext': 'srt', 'data': self._fix_subtitles(subs)}]}
 165         else:
 166             return {}
 167
 168
 169 class LyndaCourseIE(InfoExtractor):
 170     IE_NAME = 'lynda:course'
 171     IE_DESC = 'lynda.com online courses'
 172
 173     # Course link equals to welcome/introduction video link of same course
 174     # We will recognize it as course link
 175     _VALID_URL = r'https?://(?:www|m)\.lynda\.com/(?P<coursepath>[^/]+/[^/]+/(?P<courseid>\d+))-\d\.html'
 176
 177     def _real_extract(self, url):
 178         mobj = re.match(self._VALID_URL, url)
 179         course_path = mobj.group('coursepath')
 180         course_id = mobj.group('courseid')
 181
 182         page = self._download_webpage('http://www.lynda.com/ajax/player?courseId=%s&type=course' % course_id,
 183                                       course_id, 'Downloading course JSON')
 184         course_json = json.loads(page)
 185
 186         if 'Status' in course_json and course_json['Status'] == 'NotFound':
 187             raise ExtractorError('Course %s does not exist' % course_id, expected=True)
 188
 189         unaccessible_videos = 0
 190         videos = []
 191         (username, _) = self._get_login_info()
 192
 193         # Might want to extract videos right here from video['Formats'] as it seems 'Formats' is not provided
 194         # by single video API anymore
 195
 196         for chapter in course_json['Chapters']:
 197             for video in chapter['Videos']:
 198                 if username is None and video['HasAccess'] is False:
 199                     unaccessible_videos += 1
 200                     continue
 201                 videos.append(video['ID'])
 202
 203         if unaccessible_videos > 0:
 204             self._downloader.report_warning('%s videos are only available for members and will not be downloaded. '
 205                                             % unaccessible_videos + LyndaIE.ACCOUNT_CREDENTIALS_HINT)
 206
 207         entries = [
 208             self.url_result('http://www.lynda.com/%s/%s-4.html' %
 209                             (course_path, video_id),
 210                             'Lynda')
 211             for video_id in videos]
 212
 213         course_title = course_json['Title']
 214
 215         return self.playlist_result(entries, course_id, course_title)