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[youtubedl] / youtube_dl / extractor / lynda.py
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'
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
122 def _raise_unavailable(self, video_id):
123 self.raise_login_required(
124 'Video %s is only available for members' % video_id)
125
126 def _real_extract(self, url):
127 mobj = re.match(self._VALID_URL, url)
128 video_id = mobj.group('id')
129 course_id = mobj.group('course_id')
130
131 query = {
132 'videoId': video_id,
133 'type': 'video',
134 }
135
136 video = self._download_json(
137 'https://www.lynda.com/ajax/player', video_id,
138 'Downloading video JSON', fatal=False, query=query)
139
140 # Fallback scenario
141 if not video:
142 query['courseId'] = course_id
143
144 play = self._download_json(
145 'https://www.lynda.com/ajax/course/%s/%s/play'
146 % (course_id, video_id), video_id, 'Downloading play JSON')
147
148 if not play:
149 self._raise_unavailable(video_id)
150
151 formats = []
152 for formats_dict in play:
153 urls = formats_dict.get('urls')
154 if not isinstance(urls, dict):
155 continue
156 cdn = formats_dict.get('name')
157 for format_id, format_url in urls.items():
158 if not format_url:
159 continue
160 formats.append({
161 'url': format_url,
162 'format_id': '%s-%s' % (cdn, format_id) if cdn else format_id,
163 'height': int_or_none(format_id),
164 })
165 self._sort_formats(formats)
166
167 conviva = self._download_json(
168 'https://www.lynda.com/ajax/player/conviva', video_id,
169 'Downloading conviva JSON', query=query)
170
171 return {
172 'id': video_id,
173 'title': conviva['VideoTitle'],
174 'description': conviva.get('VideoDescription'),
175 'release_year': int_or_none(conviva.get('ReleaseYear')),
176 'duration': int_or_none(conviva.get('Duration')),
177 'creator': conviva.get('Author'),
178 'formats': formats,
179 }
180
181 if 'Status' in video:
182 raise ExtractorError(
183 'lynda returned error: %s' % video['Message'], expected=True)
184
185 if video.get('HasAccess') is False:
186 self._raise_unavailable(video_id)
187
188 video_id = compat_str(video.get('ID') or video_id)
189 duration = int_or_none(video.get('DurationInSeconds'))
190 title = video['Title']
191
192 formats = []
193
194 fmts = video.get('Formats')
195 if fmts:
196 formats.extend([{
197 'url': f['Url'],
198 'ext': f.get('Extension'),
199 'width': int_or_none(f.get('Width')),
200 'height': int_or_none(f.get('Height')),
201 'filesize': int_or_none(f.get('FileSize')),
202 'format_id': compat_str(f.get('Resolution')) if f.get('Resolution') else None,
203 } for f in fmts if f.get('Url')])
204
205 prioritized_streams = video.get('PrioritizedStreams')
206 if prioritized_streams:
207 for prioritized_stream_id, prioritized_stream in prioritized_streams.items():
208 formats.extend([{
209 'url': video_url,
210 'height': int_or_none(format_id),
211 'format_id': '%s-%s' % (prioritized_stream_id, format_id),
212 } for format_id, video_url in prioritized_stream.items()])
213
214 self._check_formats(formats, video_id)
215 self._sort_formats(formats)
216
217 subtitles = self.extract_subtitles(video_id)
218
219 return {
220 'id': video_id,
221 'title': title,
222 'duration': duration,
223 'subtitles': subtitles,
224 'formats': formats
225 }
226
227 def _fix_subtitles(self, subs):
228 srt = ''
229 seq_counter = 0
230 for pos in range(0, len(subs) - 1):
231 seq_current = subs[pos]
232 m_current = re.match(self._TIMECODE_REGEX, seq_current['Timecode'])
233 if m_current is None:
234 continue
235 seq_next = subs[pos + 1]
236 m_next = re.match(self._TIMECODE_REGEX, seq_next['Timecode'])
237 if m_next is None:
238 continue
239 appear_time = m_current.group('timecode')
240 disappear_time = m_next.group('timecode')
241 text = seq_current['Caption'].strip()
242 if text:
243 seq_counter += 1
244 srt += '%s\r\n%s --> %s\r\n%s\r\n\r\n' % (seq_counter, appear_time, disappear_time, text)
245 if srt:
246 return srt
247
248 def _get_subtitles(self, video_id):
249 url = 'https://www.lynda.com/ajax/player?videoId=%s&type=transcript' % video_id
250 subs = self._download_json(url, None, False)
251 fixed_subs = self._fix_subtitles(subs)
252 if fixed_subs:
253 return {'en': [{'ext': 'srt', 'data': fixed_subs}]}
254 else:
255 return {}
256
257
258 class LyndaCourseIE(LyndaBaseIE):
259 IE_NAME = 'lynda:course'
260 IE_DESC = 'lynda.com online courses'
261
262 # Course link equals to welcome/introduction video link of same course
263 # We will recognize it as course link
264 _VALID_URL = r'https?://(?:www|m)\.(?:lynda\.com|educourse\.ga)/(?P<coursepath>(?:[^/]+/){2,3}(?P<courseid>\d+))-2\.html'
265
266 _TESTS = [{
267 'url': 'https://www.lynda.com/Graphic-Design-tutorials/Grundlagen-guten-Gestaltung/393570-2.html',
268 'only_matching': True,
269 }, {
270 'url': 'https://www.lynda.com/de/Graphic-Design-tutorials/Grundlagen-guten-Gestaltung/393570-2.html',
271 'only_matching': True,
272 }]
273
274 def _real_extract(self, url):
275 mobj = re.match(self._VALID_URL, url)
276 course_path = mobj.group('coursepath')
277 course_id = mobj.group('courseid')
278
279 item_template = 'https://www.lynda.com/%s/%%s-4.html' % course_path
280
281 course = self._download_json(
282 'https://www.lynda.com/ajax/player?courseId=%s&type=course' % course_id,
283 course_id, 'Downloading course JSON', fatal=False)
284
285 if not course:
286 webpage = self._download_webpage(url, course_id)
287 entries = [
288 self.url_result(
289 item_template % video_id, ie=LyndaIE.ie_key(),
290 video_id=video_id)
291 for video_id in re.findall(
292 r'data-video-id=["\'](\d+)', webpage)]
293 return self.playlist_result(
294 entries, course_id,
295 self._og_search_title(webpage, fatal=False),
296 self._og_search_description(webpage))
297
298 if course.get('Status') == 'NotFound':
299 raise ExtractorError(
300 'Course %s does not exist' % course_id, expected=True)
301
302 unaccessible_videos = 0
303 entries = []
304
305 # Might want to extract videos right here from video['Formats'] as it seems 'Formats' is not provided
306 # by single video API anymore
307
308 for chapter in course['Chapters']:
309 for video in chapter.get('Videos', []):
310 if video.get('HasAccess') is False:
311 unaccessible_videos += 1
312 continue
313 video_id = video.get('ID')
314 if video_id:
315 entries.append({
316 '_type': 'url_transparent',
317 'url': item_template % video_id,
318 'ie_key': LyndaIE.ie_key(),
319 'chapter': chapter.get('Title'),
320 'chapter_number': int_or_none(chapter.get('ChapterIndex')),
321 'chapter_id': compat_str(chapter.get('ID')),
322 })
323
324 if unaccessible_videos > 0:
325 self._downloader.report_warning(
326 '%s videos are only available for members (or paid members) and will not be downloaded. '
327 % unaccessible_videos + self._ACCOUNT_CREDENTIALS_HINT)
328
329 course_title = course.get('Title')
330 course_description = course.get('Description')
331
332 return self.playlist_result(entries, course_id, course_title, course_description)