_ Git - youtube-dl/blob - youtube_dl/extractor/lynda.py

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