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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_HTTPError,
8 compat_str,
9 compat_urlparse,
10 )
11 from ..utils import (
12 ExtractorError,
13 int_or_none,
14 urlencode_postdata,
15 )
16
17
18 class LyndaBaseIE(InfoExtractor):
19 _SIGNIN_URL = 'https://www.lynda.com/signin'
20 _PASSWORD_URL = 'https://www.lynda.com/signin/password'
21 _USER_URL = 'https://www.lynda.com/signin/user'
22 _ACCOUNT_CREDENTIALS_HINT = 'Use --username and --password options to provide lynda.com account credentials.'
23 _NETRC_MACHINE = 'lynda'
24
25 def _real_initialize(self):
26 self._login()
27
28 @staticmethod
29 def _check_error(json_string, key_or_keys):
30 keys = [key_or_keys] if isinstance(key_or_keys, compat_str) else key_or_keys
31 for key in keys:
32 error = json_string.get(key)
33 if error:
34 raise ExtractorError('Unable to login: %s' % error, expected=True)
35
36 def _login_step(self, form_html, fallback_action_url, extra_form_data, note, referrer_url):
37 action_url = self._search_regex(
38 r'<form[^>]+action=(["\'])(?P<url>.+?)\1', form_html,
39 'post url', default=fallback_action_url, group='url')
40
41 if not action_url.startswith('http'):
42 action_url = compat_urlparse.urljoin(self._SIGNIN_URL, action_url)
43
44 form_data = self._hidden_inputs(form_html)
45 form_data.update(extra_form_data)
46
47 try:
48 response = self._download_json(
49 action_url, None, note,
50 data=urlencode_postdata(form_data),
51 headers={
52 'Referer': referrer_url,
53 'X-Requested-With': 'XMLHttpRequest',
54 })
55 except ExtractorError as e:
56 if isinstance(e.cause, compat_HTTPError) and e.cause.code == 500:
57 response = self._parse_json(e.cause.read().decode('utf-8'), None)
58 self._check_error(response, ('email', 'password'))
59 raise
60
61 self._check_error(response, 'ErrorMessage')
62
63 return response, action_url
64
65 def _login(self):
66 username, password = self._get_login_info()
67 if username is None:
68 return
69
70 # Step 1: download signin page
71 signin_page = self._download_webpage(
72 self._SIGNIN_URL, None, 'Downloading signin page')
73
74 # Already logged in
75 if any(re.search(p, signin_page) for p in (
76 r'isLoggedIn\s*:\s*true', r'logout\.aspx', r'>Log out<')):
77 return
78
79 # Step 2: submit email
80 signin_form = self._search_regex(
81 r'(?s)(<form[^>]+data-form-name=["\']signin["\'][^>]*>.+?</form>)',
82 signin_page, 'signin form')
83 signin_page, signin_url = self._login_step(
84 signin_form, self._PASSWORD_URL, {'email': username},
85 'Submitting email', self._SIGNIN_URL)
86
87 # Step 3: submit password
88 password_form = signin_page['body']
89 self._login_step(
90 password_form, self._USER_URL, {'email': username, 'password': password},
91 'Submitting password', signin_url)
92
93
94 class LyndaIE(LyndaBaseIE):
95 IE_NAME = 'lynda'
96 IE_DESC = 'lynda.com videos'
97 _VALID_URL = r'https?://(?:www\.)?(?:lynda\.com|educourse\.ga)/(?:[^/]+/[^/]+/(?P<course_id>\d+)|player/embed)/(?P<id>\d+)'
98
99 _TIMECODE_REGEX = r'\[(?P<timecode>\d+:\d+:\d+[\.,]\d+)\]'
100
101 _TESTS = [{
102 'url': 'https://www.lynda.com/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html',
103 # md5 is unstable
104 'info_dict': {
105 'id': '114408',
106 'ext': 'mp4',
107 'title': 'Using the exercise files',
108 'duration': 68
109 }
110 }, {
111 'url': 'https://www.lynda.com/player/embed/133770?tr=foo=1;bar=g;fizz=rt&fs=0',
112 'only_matching': True,
113 }, {
114 'url': 'https://educourse.ga/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html',
115 'only_matching': True,
116 }]
117
118 def _raise_unavailable(self, video_id):
119 self.raise_login_required(
120 'Video %s is only available for members' % video_id)
121
122 def _real_extract(self, url):
123 mobj = re.match(self._VALID_URL, url)
124 video_id = mobj.group('id')
125 course_id = mobj.group('course_id')
126
127 query = {
128 'videoId': video_id,
129 'type': 'video',
130 }
131
132 video = self._download_json(
133 'https://www.lynda.com/ajax/player', video_id,
134 'Downloading video JSON', fatal=False, query=query)
135
136 # Fallback scenario
137 if not video:
138 query['courseId'] = course_id
139
140 play = self._download_json(
141 'https://www.lynda.com/ajax/course/%s/%s/play'
142 % (course_id, video_id), video_id, 'Downloading play JSON')
143
144 if not play:
145 self._raise_unavailable(video_id)
146
147 formats = []
148 for formats_dict in play:
149 urls = formats_dict.get('urls')
150 if not isinstance(urls, dict):
151 continue
152 cdn = formats_dict.get('name')
153 for format_id, format_url in urls.items():
154 if not format_url:
155 continue
156 formats.append({
157 'url': format_url,
158 'format_id': '%s-%s' % (cdn, format_id) if cdn else format_id,
159 'height': int_or_none(format_id),
160 })
161 self._sort_formats(formats)
162
163 conviva = self._download_json(
164 'https://www.lynda.com/ajax/player/conviva', video_id,
165 'Downloading conviva JSON', query=query)
166
167 return {
168 'id': video_id,
169 'title': conviva['VideoTitle'],
170 'description': conviva.get('VideoDescription'),
171 'release_year': int_or_none(conviva.get('ReleaseYear')),
172 'duration': int_or_none(conviva.get('Duration')),
173 'creator': conviva.get('Author'),
174 'formats': formats,
175 }
176
177 if 'Status' in video:
178 raise ExtractorError(
179 'lynda returned error: %s' % video['Message'], expected=True)
180
181 if video.get('HasAccess') is False:
182 self._raise_unavailable(video_id)
183
184 video_id = compat_str(video.get('ID') or video_id)
185 duration = int_or_none(video.get('DurationInSeconds'))
186 title = video['Title']
187
188 formats = []
189
190 fmts = video.get('Formats')
191 if fmts:
192 formats.extend([{
193 'url': f['Url'],
194 'ext': f.get('Extension'),
195 'width': int_or_none(f.get('Width')),
196 'height': int_or_none(f.get('Height')),
197 'filesize': int_or_none(f.get('FileSize')),
198 'format_id': compat_str(f.get('Resolution')) if f.get('Resolution') else None,
199 } for f in fmts if f.get('Url')])
200
201 prioritized_streams = video.get('PrioritizedStreams')
202 if prioritized_streams:
203 for prioritized_stream_id, prioritized_stream in prioritized_streams.items():
204 formats.extend([{
205 'url': video_url,
206 'height': int_or_none(format_id),
207 'format_id': '%s-%s' % (prioritized_stream_id, format_id),
208 } for format_id, video_url in prioritized_stream.items()])
209
210 self._check_formats(formats, video_id)
211 self._sort_formats(formats)
212
213 subtitles = self.extract_subtitles(video_id)
214
215 return {
216 'id': video_id,
217 'title': title,
218 'duration': duration,
219 'subtitles': subtitles,
220 'formats': formats
221 }
222
223 def _fix_subtitles(self, subs):
224 srt = ''
225 seq_counter = 0
226 for pos in range(0, len(subs) - 1):
227 seq_current = subs[pos]
228 m_current = re.match(self._TIMECODE_REGEX, seq_current['Timecode'])
229 if m_current is None:
230 continue
231 seq_next = subs[pos + 1]
232 m_next = re.match(self._TIMECODE_REGEX, seq_next['Timecode'])
233 if m_next is None:
234 continue
235 appear_time = m_current.group('timecode')
236 disappear_time = m_next.group('timecode')
237 text = seq_current['Caption'].strip()
238 if text:
239 seq_counter += 1
240 srt += '%s\r\n%s --> %s\r\n%s\r\n\r\n' % (seq_counter, appear_time, disappear_time, text)
241 if srt:
242 return srt
243
244 def _get_subtitles(self, video_id):
245 url = 'https://www.lynda.com/ajax/player?videoId=%s&type=transcript' % video_id
246 subs = self._download_json(url, None, False)
247 if subs:
248 return {'en': [{'ext': 'srt', 'data': self._fix_subtitles(subs)}]}
249 else:
250 return {}
251
252
253 class LyndaCourseIE(LyndaBaseIE):
254 IE_NAME = 'lynda:course'
255 IE_DESC = 'lynda.com online courses'
256
257 # Course link equals to welcome/introduction video link of same course
258 # We will recognize it as course link
259 _VALID_URL = r'https?://(?:www|m)\.(?:lynda\.com|educourse\.ga)/(?P<coursepath>[^/]+/[^/]+/(?P<courseid>\d+))-\d\.html'
260
261 def _real_extract(self, url):
262 mobj = re.match(self._VALID_URL, url)
263 course_path = mobj.group('coursepath')
264 course_id = mobj.group('courseid')
265
266 item_template = 'https://www.lynda.com/%s/%%s-4.html' % course_path
267
268 course = self._download_json(
269 'https://www.lynda.com/ajax/player?courseId=%s&type=course' % course_id,
270 course_id, 'Downloading course JSON', fatal=False)
271
272 if not course:
273 webpage = self._download_webpage(url, course_id)
274 entries = [
275 self.url_result(
276 item_template % video_id, ie=LyndaIE.ie_key(),
277 video_id=video_id)
278 for video_id in re.findall(
279 r'data-video-id=["\'](\d+)', webpage)]
280 return self.playlist_result(
281 entries, course_id,
282 self._og_search_title(webpage, fatal=False),
283 self._og_search_description(webpage))
284
285 if course.get('Status') == 'NotFound':
286 raise ExtractorError(
287 'Course %s does not exist' % course_id, expected=True)
288
289 unaccessible_videos = 0
290 entries = []
291
292 # Might want to extract videos right here from video['Formats'] as it seems 'Formats' is not provided
293 # by single video API anymore
294
295 for chapter in course['Chapters']:
296 for video in chapter.get('Videos', []):
297 if video.get('HasAccess') is False:
298 unaccessible_videos += 1
299 continue
300 video_id = video.get('ID')
301 if video_id:
302 entries.append({
303 '_type': 'url_transparent',
304 'url': item_template % video_id,
305 'ie_key': LyndaIE.ie_key(),
306 'chapter': chapter.get('Title'),
307 'chapter_number': int_or_none(chapter.get('ChapterIndex')),
308 'chapter_id': compat_str(chapter.get('ID')),
309 })
310
311 if unaccessible_videos > 0:
312 self._downloader.report_warning(
313 '%s videos are only available for members (or paid members) and will not be downloaded. '
314 % unaccessible_videos + self._ACCOUNT_CREDENTIALS_HINT)
315
316 course_title = course.get('Title')
317 course_description = course.get('Description')
318
319 return self.playlist_result(entries, course_id, course_title, course_description)