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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/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)