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[youtubedl] / youtube_dl / extractor / udemy.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_urllib_request,
10 compat_urlparse,
11 )
12 from ..utils import (
13 determine_ext,
14 extract_attributes,
15 ExtractorError,
16 float_or_none,
17 int_or_none,
18 sanitized_Request,
19 unescapeHTML,
20 urlencode_postdata,
21 )
22
23
24 class UdemyIE(InfoExtractor):
25 IE_NAME = 'udemy'
26 _VALID_URL = r'''(?x)
27 https?://
28 www\.udemy\.com/
29 (?:
30 [^#]+\#/lecture/|
31 lecture/view/?\?lectureId=|
32 [^/]+/learn/v4/t/lecture/
33 )
34 (?P<id>\d+)
35 '''
36 _LOGIN_URL = 'https://www.udemy.com/join/login-popup/?displayType=ajax&showSkipButton=1'
37 _ORIGIN_URL = 'https://www.udemy.com'
38 _NETRC_MACHINE = 'udemy'
39
40 _TESTS = [{
41 'url': 'https://www.udemy.com/java-tutorial/#/lecture/172757',
42 'md5': '98eda5b657e752cf945d8445e261b5c5',
43 'info_dict': {
44 'id': '160614',
45 'ext': 'mp4',
46 'title': 'Introduction and Installation',
47 'description': 'md5:c0d51f6f21ef4ec65f091055a5eef876',
48 'duration': 579.29,
49 },
50 'skip': 'Requires udemy account credentials',
51 }, {
52 # new URL schema
53 'url': 'https://www.udemy.com/electric-bass-right-from-the-start/learn/v4/t/lecture/4580906',
54 'only_matching': True,
55 }]
56
57 def _extract_course_info(self, webpage, video_id):
58 course = self._parse_json(
59 unescapeHTML(self._search_regex(
60 r'ng-init=["\'].*\bcourse=({.+?});', webpage, 'course', default='{}')),
61 video_id, fatal=False) or {}
62 course_id = course.get('id') or self._search_regex(
63 (r'&quot;id&quot;\s*:\s*(\d+)', r'data-course-id=["\'](\d+)'),
64 webpage, 'course id')
65 return course_id, course.get('title')
66
67 def _enroll_course(self, base_url, webpage, course_id):
68 def combine_url(base_url, url):
69 return compat_urlparse.urljoin(base_url, url) if not url.startswith('http') else url
70
71 checkout_url = unescapeHTML(self._search_regex(
72 r'href=(["\'])(?P<url>(?:https?://(?:www\.)?udemy\.com)?/payment/checkout/.+?)\1',
73 webpage, 'checkout url', group='url', default=None))
74 if checkout_url:
75 raise ExtractorError(
76 'Course %s is not free. You have to pay for it before you can download. '
77 'Use this URL to confirm purchase: %s'
78 % (course_id, combine_url(base_url, checkout_url)),
79 expected=True)
80
81 enroll_url = unescapeHTML(self._search_regex(
82 r'href=(["\'])(?P<url>(?:https?://(?:www\.)?udemy\.com)?/course/subscribe/.+?)\1',
83 webpage, 'enroll url', group='url', default=None))
84 if enroll_url:
85 webpage = self._download_webpage(
86 combine_url(base_url, enroll_url),
87 course_id, 'Enrolling in the course',
88 headers={'Referer': base_url})
89 if '>You have enrolled in' in webpage:
90 self.to_screen('%s: Successfully enrolled in the course' % course_id)
91
92 def _download_lecture(self, course_id, lecture_id):
93 return self._download_json(
94 'https://www.udemy.com/api-2.0/users/me/subscribed-courses/%s/lectures/%s?'
95 % (course_id, lecture_id),
96 lecture_id, 'Downloading lecture JSON', query={
97 'fields[lecture]': 'title,description,view_html,asset',
98 'fields[asset]': 'asset_type,stream_url,thumbnail_url,download_urls,data',
99 })
100
101 def _handle_error(self, response):
102 if not isinstance(response, dict):
103 return
104 error = response.get('error')
105 if error:
106 error_str = 'Udemy returned error #%s: %s' % (error.get('code'), error.get('message'))
107 error_data = error.get('data')
108 if error_data:
109 error_str += ' - %s' % error_data.get('formErrors')
110 raise ExtractorError(error_str, expected=True)
111
112 def _download_json(self, url_or_request, *args, **kwargs):
113 headers = {
114 'X-Udemy-Snail-Case': 'true',
115 'X-Requested-With': 'XMLHttpRequest',
116 }
117 for cookie in self._downloader.cookiejar:
118 if cookie.name == 'client_id':
119 headers['X-Udemy-Client-Id'] = cookie.value
120 elif cookie.name == 'access_token':
121 headers['X-Udemy-Bearer-Token'] = cookie.value
122 headers['X-Udemy-Authorization'] = 'Bearer %s' % cookie.value
123
124 if isinstance(url_or_request, compat_urllib_request.Request):
125 for header, value in headers.items():
126 url_or_request.add_header(header, value)
127 else:
128 url_or_request = sanitized_Request(url_or_request, headers=headers)
129
130 response = super(UdemyIE, self)._download_json(url_or_request, *args, **kwargs)
131 self._handle_error(response)
132 return response
133
134 def _real_initialize(self):
135 self._login()
136
137 def _login(self):
138 (username, password) = self._get_login_info()
139 if username is None:
140 return
141
142 login_popup = self._download_webpage(
143 self._LOGIN_URL, None, 'Downloading login popup')
144
145 def is_logged(webpage):
146 return any(re.search(p, webpage) for p in (
147 r'href=["\'](?:https://www\.udemy\.com)?/user/logout/',
148 r'>Logout<'))
149
150 # already logged in
151 if is_logged(login_popup):
152 return
153
154 login_form = self._form_hidden_inputs('login-form', login_popup)
155
156 login_form.update({
157 'email': username,
158 'password': password,
159 })
160
161 response = self._download_webpage(
162 self._LOGIN_URL, None, 'Logging in as %s' % username,
163 data=urlencode_postdata(login_form),
164 headers={
165 'Referer': self._ORIGIN_URL,
166 'Origin': self._ORIGIN_URL,
167 })
168
169 if not is_logged(response):
170 error = self._html_search_regex(
171 r'(?s)<div[^>]+class="form-errors[^"]*">(.+?)</div>',
172 response, 'error message', default=None)
173 if error:
174 raise ExtractorError('Unable to login: %s' % error, expected=True)
175 raise ExtractorError('Unable to log in')
176
177 def _real_extract(self, url):
178 lecture_id = self._match_id(url)
179
180 webpage = self._download_webpage(url, lecture_id)
181
182 course_id, _ = self._extract_course_info(webpage, lecture_id)
183
184 try:
185 lecture = self._download_lecture(course_id, lecture_id)
186 except ExtractorError as e:
187 # Error could possibly mean we are not enrolled in the course
188 if isinstance(e.cause, compat_HTTPError) and e.cause.code == 403:
189 self._enroll_course(url, webpage, course_id)
190 lecture = self._download_lecture(course_id, lecture_id)
191 else:
192 raise
193
194 title = lecture['title']
195 description = lecture.get('description')
196
197 asset = lecture['asset']
198
199 asset_type = asset.get('asset_type') or asset.get('assetType')
200 if asset_type != 'Video':
201 raise ExtractorError(
202 'Lecture %s is not a video' % lecture_id, expected=True)
203
204 stream_url = asset.get('stream_url') or asset.get('streamUrl')
205 if stream_url:
206 youtube_url = self._search_regex(
207 r'(https?://www\.youtube\.com/watch\?v=.*)', stream_url, 'youtube URL', default=None)
208 if youtube_url:
209 return self.url_result(youtube_url, 'Youtube')
210
211 video_id = compat_str(asset['id'])
212 thumbnail = asset.get('thumbnail_url') or asset.get('thumbnailUrl')
213 duration = float_or_none(asset.get('data', {}).get('duration'))
214
215 subtitles = {}
216 automatic_captions = {}
217
218 formats = []
219
220 def extract_output_format(src, f_id):
221 return {
222 'url': src['url'],
223 'format_id': '%sp' % (src.get('height') or f_id),
224 'width': int_or_none(src.get('width')),
225 'height': int_or_none(src.get('height')),
226 'vbr': int_or_none(src.get('video_bitrate_in_kbps')),
227 'vcodec': src.get('video_codec'),
228 'fps': int_or_none(src.get('frame_rate')),
229 'abr': int_or_none(src.get('audio_bitrate_in_kbps')),
230 'acodec': src.get('audio_codec'),
231 'asr': int_or_none(src.get('audio_sample_rate')),
232 'tbr': int_or_none(src.get('total_bitrate_in_kbps')),
233 'filesize': int_or_none(src.get('file_size_in_bytes')),
234 }
235
236 outputs = asset.get('data', {}).get('outputs')
237 if not isinstance(outputs, dict):
238 outputs = {}
239
240 def add_output_format_meta(f, key):
241 output = outputs.get(key)
242 if isinstance(output, dict):
243 output_format = extract_output_format(output, key)
244 output_format.update(f)
245 return output_format
246 return f
247
248 def extract_formats(source_list):
249 if not isinstance(source_list, list):
250 return
251 for source in source_list:
252 video_url = source.get('file') or source.get('src')
253 if not video_url or not isinstance(video_url, compat_str):
254 continue
255 format_id = source.get('label')
256 f = {
257 'url': video_url,
258 'format_id': '%sp' % format_id,
259 'height': int_or_none(format_id),
260 }
261 if format_id:
262 # Some videos contain additional metadata (e.g.
263 # https://www.udemy.com/ios9-swift/learn/#/lecture/3383208)
264 f = add_output_format_meta(f, format_id)
265 formats.append(f)
266
267 download_urls = asset.get('download_urls')
268 if isinstance(download_urls, dict):
269 extract_formats(download_urls.get('Video'))
270
271 view_html = lecture.get('view_html')
272 if view_html:
273 view_html_urls = set()
274 for source in re.findall(r'<source[^>]+>', view_html):
275 attributes = extract_attributes(source)
276 src = attributes.get('src')
277 if not src:
278 continue
279 res = attributes.get('data-res')
280 height = int_or_none(res)
281 if src in view_html_urls:
282 continue
283 view_html_urls.add(src)
284 if attributes.get('type') == 'application/x-mpegURL' or determine_ext(src) == 'm3u8':
285 m3u8_formats = self._extract_m3u8_formats(
286 src, video_id, 'mp4', entry_protocol='m3u8_native',
287 m3u8_id='hls', fatal=False)
288 for f in m3u8_formats:
289 m = re.search(r'/hls_(?P<height>\d{3,4})_(?P<tbr>\d{2,})/', f['url'])
290 if m:
291 if not f.get('height'):
292 f['height'] = int(m.group('height'))
293 if not f.get('tbr'):
294 f['tbr'] = int(m.group('tbr'))
295 formats.extend(m3u8_formats)
296 else:
297 formats.append(add_output_format_meta({
298 'url': src,
299 'format_id': '%dp' % height if height else None,
300 'height': height,
301 }, res))
302
303 # react rendition since 2017.04.15 (see
304 # https://github.com/rg3/youtube-dl/issues/12744)
305 data = self._parse_json(
306 self._search_regex(
307 r'videojs-setup-data=(["\'])(?P<data>{.+?})\1', view_html,
308 'setup data', default='{}', group='data'), video_id,
309 transform_source=unescapeHTML, fatal=False)
310 if data and isinstance(data, dict):
311 extract_formats(data.get('sources'))
312 if not duration:
313 duration = int_or_none(data.get('duration'))
314 tracks = data.get('tracks')
315 if isinstance(tracks, list):
316 for track in tracks:
317 if not isinstance(track, dict):
318 continue
319 if track.get('kind') != 'captions':
320 continue
321 src = track.get('src')
322 if not src or not isinstance(src, compat_str):
323 continue
324 lang = track.get('language') or track.get(
325 'srclang') or track.get('label')
326 sub_dict = automatic_captions if track.get(
327 'autogenerated') is True else subtitles
328 sub_dict.setdefault(lang, []).append({
329 'url': src,
330 })
331
332 self._sort_formats(formats, field_preference=('height', 'width', 'tbr', 'format_id'))
333
334 return {
335 'id': video_id,
336 'title': title,
337 'description': description,
338 'thumbnail': thumbnail,
339 'duration': duration,
340 'formats': formats,
341 'subtitles': subtitles,
342 'automatic_captions': automatic_captions,
343 }
344
345
346 class UdemyCourseIE(UdemyIE):
347 IE_NAME = 'udemy:course'
348 _VALID_URL = r'https?://(?:www\.)?udemy\.com/(?P<id>[^/?#&]+)'
349 _TESTS = []
350
351 @classmethod
352 def suitable(cls, url):
353 return False if UdemyIE.suitable(url) else super(UdemyCourseIE, cls).suitable(url)
354
355 def _real_extract(self, url):
356 course_path = self._match_id(url)
357
358 webpage = self._download_webpage(url, course_path)
359
360 course_id, title = self._extract_course_info(webpage, course_path)
361
362 self._enroll_course(url, webpage, course_id)
363
364 response = self._download_json(
365 'https://www.udemy.com/api-2.0/courses/%s/cached-subscriber-curriculum-items' % course_id,
366 course_id, 'Downloading course curriculum', query={
367 'fields[chapter]': 'title,object_index',
368 'fields[lecture]': 'title,asset',
369 'page_size': '1000',
370 })
371
372 entries = []
373 chapter, chapter_number = [None] * 2
374 for entry in response['results']:
375 clazz = entry.get('_class')
376 if clazz == 'lecture':
377 asset = entry.get('asset')
378 if isinstance(asset, dict):
379 asset_type = asset.get('asset_type') or asset.get('assetType')
380 if asset_type != 'Video':
381 continue
382 lecture_id = entry.get('id')
383 if lecture_id:
384 entry = {
385 '_type': 'url_transparent',
386 'url': 'https://www.udemy.com/%s/learn/v4/t/lecture/%s' % (course_path, entry['id']),
387 'title': entry.get('title'),
388 'ie_key': UdemyIE.ie_key(),
389 }
390 if chapter_number:
391 entry['chapter_number'] = chapter_number
392 if chapter:
393 entry['chapter'] = chapter
394 entries.append(entry)
395 elif clazz == 'chapter':
396 chapter_number = entry.get('object_index')
397 chapter = entry.get('title')
398
399 return self.playlist_result(entries, course_id, title)