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[youtubedl] / 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 int_or_none,
13 compat_str,
14 )
15
16
17 class LyndaIE(SubtitlesInfoExtractor):
18 IE_NAME = 'lynda'
19 IE_DESC = 'lynda.com videos'
20 _VALID_URL = r'https?://www\.lynda\.com/[^/]+/[^/]+/\d+/(\d+)-\d\.html'
21 _LOGIN_URL = 'https://www.lynda.com/login/login.aspx'
22 _NETRC_MACHINE = 'lynda'
23
24 _SUCCESSFUL_LOGIN_REGEX = r'isLoggedIn: true'
25 _TIMECODE_REGEX = r'\[(?P<timecode>\d+:\d+:\d+[\.,]\d+)\]'
26
27 ACCOUNT_CREDENTIALS_HINT = 'Use --username and --password options to provide lynda.com account credentials.'
28
29 _TEST = {
30 'url': 'http://www.lynda.com/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html',
31 'md5': 'ecfc6862da89489161fb9cd5f5a6fac1',
32 'info_dict': {
33 'id': '114408',
34 'ext': 'mp4',
35 'title': 'Using the exercise files',
36 'duration': 68
37 }
38 }
39
40 def _real_initialize(self):
41 self._login()
42
43 def _real_extract(self, url):
44 mobj = re.match(self._VALID_URL, url)
45 video_id = mobj.group(1)
46
47 page = self._download_webpage('http://www.lynda.com/ajax/player?videoId=%s&type=video' % video_id, video_id,
48 'Downloading video JSON')
49 video_json = json.loads(page)
50
51 if 'Status' in video_json:
52 raise ExtractorError('lynda returned error: %s' % video_json['Message'], expected=True)
53
54 if video_json['HasAccess'] is False:
55 raise ExtractorError(
56 'Video %s is only available for members. ' % video_id + self.ACCOUNT_CREDENTIALS_HINT, expected=True)
57
58 video_id = compat_str(video_json['ID'])
59 duration = video_json['DurationInSeconds']
60 title = video_json['Title']
61
62 formats = []
63
64 fmts = video_json.get('Formats')
65 if fmts:
66 formats.extend([
67 {
68 'url': fmt['Url'],
69 'ext': fmt['Extension'],
70 'width': fmt['Width'],
71 'height': fmt['Height'],
72 'filesize': fmt['FileSize'],
73 'format_id': str(fmt['Resolution'])
74 } for fmt in fmts])
75
76 prioritized_streams = video_json.get('PrioritizedStreams')
77 if prioritized_streams:
78 formats.extend([
79 {
80 'url': video_url,
81 'width': int_or_none(format_id),
82 'format_id': format_id,
83 } for format_id, video_url in prioritized_streams['0'].items()
84 ])
85
86 self._sort_formats(formats)
87
88 if self._downloader.params.get('listsubtitles', False):
89 self._list_available_subtitles(video_id, page)
90 return
91
92 subtitles = self._fix_subtitles(self.extract_subtitles(video_id, page))
93
94 return {
95 'id': video_id,
96 'title': title,
97 'duration': duration,
98 'subtitles': subtitles,
99 'formats': formats
100 }
101
102 def _login(self):
103 (username, password) = self._get_login_info()
104 if username is None:
105 return
106
107 login_form = {
108 'username': username,
109 'password': password,
110 'remember': 'false',
111 'stayPut': 'false'
112 }
113 request = compat_urllib_request.Request(self._LOGIN_URL, compat_urllib_parse.urlencode(login_form))
114 login_page = self._download_webpage(request, None, 'Logging in as %s' % username)
115
116 # Not (yet) logged in
117 m = re.search(r'loginResultJson = \'(?P<json>[^\']+)\';', login_page)
118 if m is not None:
119 response = m.group('json')
120 response_json = json.loads(response)
121 state = response_json['state']
122
123 if state == 'notlogged':
124 raise ExtractorError('Unable to login, incorrect username and/or password', expected=True)
125
126 # This is when we get popup:
127 # > You're already logged in to lynda.com on two devices.
128 # > If you log in here, we'll log you out of another device.
129 # So, we need to confirm this.
130 if state == 'conflicted':
131 confirm_form = {
132 'username': '',
133 'password': '',
134 'resolve': 'true',
135 'remember': 'false',
136 'stayPut': 'false',
137 }
138 request = compat_urllib_request.Request(self._LOGIN_URL, compat_urllib_parse.urlencode(confirm_form))
139 login_page = self._download_webpage(request, None, 'Confirming log in and log out from another device')
140
141 if re.search(self._SUCCESSFUL_LOGIN_REGEX, login_page) is None:
142 raise ExtractorError('Unable to log in')
143
144 def _fix_subtitles(self, subtitles):
145 if subtitles is None:
146 return subtitles # subtitles not requested
147
148 fixed_subtitles = {}
149 for k, v in subtitles.items():
150 subs = json.loads(v)
151 if len(subs) == 0:
152 continue
153 srt = ''
154 for pos in range(0, len(subs) - 1):
155 seq_current = subs[pos]
156 m_current = re.match(self._TIMECODE_REGEX, seq_current['Timecode'])
157 if m_current is None:
158 continue
159 seq_next = subs[pos + 1]
160 m_next = re.match(self._TIMECODE_REGEX, seq_next['Timecode'])
161 if m_next is None:
162 continue
163 appear_time = m_current.group('timecode')
164 disappear_time = m_next.group('timecode')
165 text = seq_current['Caption']
166 srt += '%s\r\n%s --> %s\r\n%s' % (str(pos), appear_time, disappear_time, text)
167 if srt:
168 fixed_subtitles[k] = srt
169 return fixed_subtitles
170
171 def _get_available_subtitles(self, video_id, webpage):
172 url = 'http://www.lynda.com/ajax/player?videoId=%s&type=transcript' % video_id
173 sub = self._download_webpage(url, None, False)
174 sub_json = json.loads(sub)
175 return {'en': url} if len(sub_json) > 0 else {}
176
177
178 class LyndaCourseIE(InfoExtractor):
179 IE_NAME = 'lynda:course'
180 IE_DESC = 'lynda.com online courses'
181
182 # Course link equals to welcome/introduction video link of same course
183 # We will recognize it as course link
184 _VALID_URL = r'https?://(?:www|m)\.lynda\.com/(?P<coursepath>[^/]+/[^/]+/(?P<courseid>\d+))-\d\.html'
185
186 def _real_extract(self, url):
187 mobj = re.match(self._VALID_URL, url)
188 course_path = mobj.group('coursepath')
189 course_id = mobj.group('courseid')
190
191 page = self._download_webpage('http://www.lynda.com/ajax/player?courseId=%s&type=course' % course_id,
192 course_id, 'Downloading course JSON')
193 course_json = json.loads(page)
194
195 if 'Status' in course_json and course_json['Status'] == 'NotFound':
196 raise ExtractorError('Course %s does not exist' % course_id, expected=True)
197
198 unaccessible_videos = 0
199 videos = []
200 (username, _) = self._get_login_info()
201
202 # Might want to extract videos right here from video['Formats'] as it seems 'Formats' is not provided
203 # by single video API anymore
204
205 for chapter in course_json['Chapters']:
206 for video in chapter['Videos']:
207 if username is None and video['HasAccess'] is False:
208 unaccessible_videos += 1
209 continue
210 videos.append(video['ID'])
211
212 if unaccessible_videos > 0:
213 self._downloader.report_warning('%s videos are only available for members and will not be downloaded. '
214 % unaccessible_videos + LyndaIE.ACCOUNT_CREDENTIALS_HINT)
215
216 entries = [
217 self.url_result('http://www.lynda.com/%s/%s-4.html' %
218 (course_path, video_id),
219 'Lynda')
220 for video_id in videos]
221
222 course_title = course_json['Title']
223
224 return self.playlist_result(entries, course_id, course_title)