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1 | import re | |
2 | ||
3 | from .common import InfoExtractor | |
4 | from ..compat import ( | |
5 | compat_str, | |
6 | compat_urlparse, | |
7 | ) | |
8 | from ..utils import ( | |
9 | ExtractorError, | |
10 | int_or_none, | |
11 | urlencode_postdata, | |
12 | ) | |
13 | ||
14 | ||
15 | class LyndaBaseIE(InfoExtractor): | |
16 | _SIGNIN_URL = 'https://www.lynda.com/signin/lynda' | |
17 | _PASSWORD_URL = 'https://www.lynda.com/signin/password' | |
18 | _USER_URL = 'https://www.lynda.com/signin/user' | |
19 | _ACCOUNT_CREDENTIALS_HINT = 'Use --username and --password options to provide lynda.com account credentials.' | |
20 | _NETRC_MACHINE = 'lynda' | |
21 | ||
22 | @staticmethod | |
23 | def _check_error(json_string, key_or_keys): | |
24 | keys = [key_or_keys] if isinstance(key_or_keys, compat_str) else key_or_keys | |
25 | for key in keys: | |
26 | error = json_string.get(key) | |
27 | if error: | |
28 | raise ExtractorError('Unable to login: %s' % error, expected=True) | |
29 | ||
30 | def _perform_login_step(self, form_html, fallback_action_url, extra_form_data, note, referrer_url): | |
31 | action_url = self._search_regex( | |
32 | r'<form[^>]+action=(["\'])(?P<url>.+?)\1', form_html, | |
33 | 'post url', default=fallback_action_url, group='url') | |
34 | ||
35 | if not action_url.startswith('http'): | |
36 | action_url = compat_urlparse.urljoin(self._SIGNIN_URL, action_url) | |
37 | ||
38 | form_data = self._hidden_inputs(form_html) | |
39 | form_data.update(extra_form_data) | |
40 | ||
41 | response = self._download_json( | |
42 | action_url, None, note, | |
43 | data=urlencode_postdata(form_data), | |
44 | headers={ | |
45 | 'Referer': referrer_url, | |
46 | 'X-Requested-With': 'XMLHttpRequest', | |
47 | }, expected_status=(418, 500, )) | |
48 | ||
49 | self._check_error(response, ('email', 'password', 'ErrorMessage')) | |
50 | ||
51 | return response, action_url | |
52 | ||
53 | def _perform_login(self, username, password): | |
54 | # Step 1: download signin page | |
55 | signin_page = self._download_webpage( | |
56 | self._SIGNIN_URL, None, 'Downloading signin page') | |
57 | ||
58 | # Already logged in | |
59 | if any(re.search(p, signin_page) for p in ( | |
60 | r'isLoggedIn\s*:\s*true', r'logout\.aspx', r'>Log out<')): | |
61 | return | |
62 | ||
63 | # Step 2: submit email | |
64 | signin_form = self._search_regex( | |
65 | r'(?s)(<form[^>]+data-form-name=["\']signin["\'][^>]*>.+?</form>)', | |
66 | signin_page, 'signin form') | |
67 | signin_page, signin_url = self._login_step( | |
68 | signin_form, self._PASSWORD_URL, {'email': username}, | |
69 | 'Submitting email', self._SIGNIN_URL) | |
70 | ||
71 | # Step 3: submit password | |
72 | password_form = signin_page['body'] | |
73 | self._login_step( | |
74 | password_form, self._USER_URL, {'email': username, 'password': password}, | |
75 | 'Submitting password', signin_url) | |
76 | ||
77 | ||
78 | class LyndaIE(LyndaBaseIE): | |
79 | IE_NAME = 'lynda' | |
80 | IE_DESC = 'lynda.com videos' | |
81 | _VALID_URL = r'''(?x) | |
82 | https?:// | |
83 | (?:www\.)?(?:lynda\.com|educourse\.ga)/ | |
84 | (?: | |
85 | (?:[^/]+/){2,3}(?P<course_id>\d+)| | |
86 | player/embed | |
87 | )/ | |
88 | (?P<id>\d+) | |
89 | ''' | |
90 | ||
91 | _TIMECODE_REGEX = r'\[(?P<timecode>\d+:\d+:\d+[\.,]\d+)\]' | |
92 | ||
93 | _TESTS = [{ | |
94 | 'url': 'https://www.lynda.com/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html', | |
95 | # md5 is unstable | |
96 | 'info_dict': { | |
97 | 'id': '114408', | |
98 | 'ext': 'mp4', | |
99 | 'title': 'Using the exercise files', | |
100 | 'duration': 68 | |
101 | } | |
102 | }, { | |
103 | 'url': 'https://www.lynda.com/player/embed/133770?tr=foo=1;bar=g;fizz=rt&fs=0', | |
104 | 'only_matching': True, | |
105 | }, { | |
106 | 'url': 'https://educourse.ga/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html', | |
107 | 'only_matching': True, | |
108 | }, { | |
109 | 'url': 'https://www.lynda.com/de/Graphic-Design-tutorials/Willkommen-Grundlagen-guten-Gestaltung/393570/393572-4.html', | |
110 | 'only_matching': True, | |
111 | }, { | |
112 | # Status="NotFound", Message="Transcript not found" | |
113 | 'url': 'https://www.lynda.com/ASP-NET-tutorials/What-you-should-know/5034180/2811512-4.html', | |
114 | 'only_matching': True, | |
115 | }] | |
116 | ||
117 | def _raise_unavailable(self, video_id): | |
118 | self.raise_login_required( | |
119 | 'Video %s is only available for members' % video_id) | |
120 | ||
121 | def _real_extract(self, url): | |
122 | mobj = self._match_valid_url(url) | |
123 | video_id = mobj.group('id') | |
124 | course_id = mobj.group('course_id') | |
125 | ||
126 | query = { | |
127 | 'videoId': video_id, | |
128 | 'type': 'video', | |
129 | } | |
130 | ||
131 | video = self._download_json( | |
132 | 'https://www.lynda.com/ajax/player', video_id, | |
133 | 'Downloading video JSON', fatal=False, query=query) | |
134 | ||
135 | # Fallback scenario | |
136 | if not video: | |
137 | query['courseId'] = course_id | |
138 | ||
139 | play = self._download_json( | |
140 | 'https://www.lynda.com/ajax/course/%s/%s/play' | |
141 | % (course_id, video_id), video_id, 'Downloading play JSON') | |
142 | ||
143 | if not play: | |
144 | self._raise_unavailable(video_id) | |
145 | ||
146 | formats = [] | |
147 | for formats_dict in play: | |
148 | urls = formats_dict.get('urls') | |
149 | if not isinstance(urls, dict): | |
150 | continue | |
151 | cdn = formats_dict.get('name') | |
152 | for format_id, format_url in urls.items(): | |
153 | if not format_url: | |
154 | continue | |
155 | formats.append({ | |
156 | 'url': format_url, | |
157 | 'format_id': '%s-%s' % (cdn, format_id) if cdn else format_id, | |
158 | 'height': int_or_none(format_id), | |
159 | }) | |
160 | ||
161 | conviva = self._download_json( | |
162 | 'https://www.lynda.com/ajax/player/conviva', video_id, | |
163 | 'Downloading conviva JSON', query=query) | |
164 | ||
165 | return { | |
166 | 'id': video_id, | |
167 | 'title': conviva['VideoTitle'], | |
168 | 'description': conviva.get('VideoDescription'), | |
169 | 'release_year': int_or_none(conviva.get('ReleaseYear')), | |
170 | 'duration': int_or_none(conviva.get('Duration')), | |
171 | 'creator': conviva.get('Author'), | |
172 | 'formats': formats, | |
173 | } | |
174 | ||
175 | if 'Status' in video: | |
176 | raise ExtractorError( | |
177 | 'lynda returned error: %s' % video['Message'], expected=True) | |
178 | ||
179 | if video.get('HasAccess') is False: | |
180 | self._raise_unavailable(video_id) | |
181 | ||
182 | video_id = compat_str(video.get('ID') or video_id) | |
183 | duration = int_or_none(video.get('DurationInSeconds')) | |
184 | title = video['Title'] | |
185 | ||
186 | formats = [] | |
187 | ||
188 | fmts = video.get('Formats') | |
189 | if fmts: | |
190 | formats.extend([{ | |
191 | 'url': f['Url'], | |
192 | 'ext': f.get('Extension'), | |
193 | 'width': int_or_none(f.get('Width')), | |
194 | 'height': int_or_none(f.get('Height')), | |
195 | 'filesize': int_or_none(f.get('FileSize')), | |
196 | 'format_id': compat_str(f.get('Resolution')) if f.get('Resolution') else None, | |
197 | } for f in fmts if f.get('Url')]) | |
198 | ||
199 | prioritized_streams = video.get('PrioritizedStreams') | |
200 | if prioritized_streams: | |
201 | for prioritized_stream_id, prioritized_stream in prioritized_streams.items(): | |
202 | formats.extend([{ | |
203 | 'url': video_url, | |
204 | 'height': int_or_none(format_id), | |
205 | 'format_id': '%s-%s' % (prioritized_stream_id, format_id), | |
206 | } for format_id, video_url in prioritized_stream.items()]) | |
207 | ||
208 | self._check_formats(formats, video_id) | |
209 | ||
210 | subtitles = self.extract_subtitles(video_id) | |
211 | ||
212 | return { | |
213 | 'id': video_id, | |
214 | 'title': title, | |
215 | 'duration': duration, | |
216 | 'subtitles': subtitles, | |
217 | 'formats': formats | |
218 | } | |
219 | ||
220 | def _fix_subtitles(self, subs): | |
221 | srt = '' | |
222 | seq_counter = 0 | |
223 | for pos in range(0, len(subs) - 1): | |
224 | seq_current = subs[pos] | |
225 | m_current = re.match(self._TIMECODE_REGEX, seq_current['Timecode']) | |
226 | if m_current is None: | |
227 | continue | |
228 | seq_next = subs[pos + 1] | |
229 | m_next = re.match(self._TIMECODE_REGEX, seq_next['Timecode']) | |
230 | if m_next is None: | |
231 | continue | |
232 | appear_time = m_current.group('timecode') | |
233 | disappear_time = m_next.group('timecode') | |
234 | text = seq_current['Caption'].strip() | |
235 | if text: | |
236 | seq_counter += 1 | |
237 | srt += '%s\r\n%s --> %s\r\n%s\r\n\r\n' % (seq_counter, appear_time, disappear_time, text) | |
238 | if srt: | |
239 | return srt | |
240 | ||
241 | def _get_subtitles(self, video_id): | |
242 | url = 'https://www.lynda.com/ajax/player?videoId=%s&type=transcript' % video_id | |
243 | subs = self._download_webpage( | |
244 | url, video_id, 'Downloading subtitles JSON', fatal=False) | |
245 | if not subs or 'Status="NotFound"' in subs: | |
246 | return {} | |
247 | subs = self._parse_json(subs, video_id, fatal=False) | |
248 | if not subs: | |
249 | return {} | |
250 | fixed_subs = self._fix_subtitles(subs) | |
251 | if fixed_subs: | |
252 | return {'en': [{'ext': 'srt', 'data': fixed_subs}]} | |
253 | return {} | |
254 | ||
255 | ||
256 | class LyndaCourseIE(LyndaBaseIE): | |
257 | IE_NAME = 'lynda:course' | |
258 | IE_DESC = 'lynda.com online courses' | |
259 | ||
260 | # Course link equals to welcome/introduction video link of same course | |
261 | # We will recognize it as course link | |
262 | _VALID_URL = r'https?://(?:www|m)\.(?:lynda\.com|educourse\.ga)/(?P<coursepath>(?:[^/]+/){2,3}(?P<courseid>\d+))-2\.html' | |
263 | ||
264 | _TESTS = [{ | |
265 | 'url': 'https://www.lynda.com/Graphic-Design-tutorials/Grundlagen-guten-Gestaltung/393570-2.html', | |
266 | 'only_matching': True, | |
267 | }, { | |
268 | 'url': 'https://www.lynda.com/de/Graphic-Design-tutorials/Grundlagen-guten-Gestaltung/393570-2.html', | |
269 | 'only_matching': True, | |
270 | }] | |
271 | ||
272 | def _real_extract(self, url): | |
273 | mobj = self._match_valid_url(url) | |
274 | course_path = mobj.group('coursepath') | |
275 | course_id = mobj.group('courseid') | |
276 | ||
277 | item_template = 'https://www.lynda.com/%s/%%s-4.html' % course_path | |
278 | ||
279 | course = self._download_json( | |
280 | 'https://www.lynda.com/ajax/player?courseId=%s&type=course' % course_id, | |
281 | course_id, 'Downloading course JSON', fatal=False) | |
282 | ||
283 | if not course: | |
284 | webpage = self._download_webpage(url, course_id) | |
285 | entries = [ | |
286 | self.url_result( | |
287 | item_template % video_id, ie=LyndaIE.ie_key(), | |
288 | video_id=video_id) | |
289 | for video_id in re.findall( | |
290 | r'data-video-id=["\'](\d+)', webpage)] | |
291 | return self.playlist_result( | |
292 | entries, course_id, | |
293 | self._og_search_title(webpage, fatal=False), | |
294 | self._og_search_description(webpage)) | |
295 | ||
296 | if course.get('Status') == 'NotFound': | |
297 | raise ExtractorError( | |
298 | 'Course %s does not exist' % course_id, expected=True) | |
299 | ||
300 | unaccessible_videos = 0 | |
301 | entries = [] | |
302 | ||
303 | # Might want to extract videos right here from video['Formats'] as it seems 'Formats' is not provided | |
304 | # by single video API anymore | |
305 | ||
306 | for chapter in course['Chapters']: | |
307 | for video in chapter.get('Videos', []): | |
308 | if video.get('HasAccess') is False: | |
309 | unaccessible_videos += 1 | |
310 | continue | |
311 | video_id = video.get('ID') | |
312 | if video_id: | |
313 | entries.append({ | |
314 | '_type': 'url_transparent', | |
315 | 'url': item_template % video_id, | |
316 | 'ie_key': LyndaIE.ie_key(), | |
317 | 'chapter': chapter.get('Title'), | |
318 | 'chapter_number': int_or_none(chapter.get('ChapterIndex')), | |
319 | 'chapter_id': compat_str(chapter.get('ID')), | |
320 | }) | |
321 | ||
322 | if unaccessible_videos > 0: | |
323 | self.report_warning( | |
324 | '%s videos are only available for members (or paid members) and will not be downloaded. ' | |
325 | % unaccessible_videos + self._ACCOUNT_CREDENTIALS_HINT) | |
326 | ||
327 | course_title = course.get('Title') | |
328 | course_description = course.get('Description') | |
329 | ||
330 | return self.playlist_result(entries, course_id, course_title, course_description) |