]> Raphaƫl G. Git Repositories - youtubedl/blob - youtube_dl/extractor/udemy.py
Prepare to release.
[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 formats = []
216
217 def extract_output_format(src):
218 return {
219 'url': src['url'],
220 'format_id': '%sp' % (src.get('height') or format_id),
221 'width': int_or_none(src.get('width')),
222 'height': int_or_none(src.get('height')),
223 'vbr': int_or_none(src.get('video_bitrate_in_kbps')),
224 'vcodec': src.get('video_codec'),
225 'fps': int_or_none(src.get('frame_rate')),
226 'abr': int_or_none(src.get('audio_bitrate_in_kbps')),
227 'acodec': src.get('audio_codec'),
228 'asr': int_or_none(src.get('audio_sample_rate')),
229 'tbr': int_or_none(src.get('total_bitrate_in_kbps')),
230 'filesize': int_or_none(src.get('file_size_in_bytes')),
231 }
232
233 outputs = asset.get('data', {}).get('outputs')
234 if not isinstance(outputs, dict):
235 outputs = {}
236
237 def add_output_format_meta(f, key):
238 output = outputs.get(key)
239 if isinstance(output, dict):
240 output_format = extract_output_format(output)
241 output_format.update(f)
242 return output_format
243 return f
244
245 download_urls = asset.get('download_urls')
246 if isinstance(download_urls, dict):
247 video = download_urls.get('Video')
248 if isinstance(video, list):
249 for format_ in video:
250 video_url = format_.get('file')
251 if not video_url:
252 continue
253 format_id = format_.get('label')
254 f = {
255 'url': format_['file'],
256 'format_id': '%sp' % format_id,
257 'height': int_or_none(format_id),
258 }
259 if format_id:
260 # Some videos contain additional metadata (e.g.
261 # https://www.udemy.com/ios9-swift/learn/#/lecture/3383208)
262 f = add_output_format_meta(f, format_id)
263 formats.append(f)
264
265 view_html = lecture.get('view_html')
266 if view_html:
267 view_html_urls = set()
268 for source in re.findall(r'<source[^>]+>', view_html):
269 attributes = extract_attributes(source)
270 src = attributes.get('src')
271 if not src:
272 continue
273 res = attributes.get('data-res')
274 height = int_or_none(res)
275 if src in view_html_urls:
276 continue
277 view_html_urls.add(src)
278 if attributes.get('type') == 'application/x-mpegURL' or determine_ext(src) == 'm3u8':
279 m3u8_formats = self._extract_m3u8_formats(
280 src, video_id, 'mp4', entry_protocol='m3u8_native',
281 m3u8_id='hls', fatal=False)
282 for f in m3u8_formats:
283 m = re.search(r'/hls_(?P<height>\d{3,4})_(?P<tbr>\d{2,})/', f['url'])
284 if m:
285 if not f.get('height'):
286 f['height'] = int(m.group('height'))
287 if not f.get('tbr'):
288 f['tbr'] = int(m.group('tbr'))
289 formats.extend(m3u8_formats)
290 else:
291 formats.append(add_output_format_meta({
292 'url': src,
293 'format_id': '%dp' % height if height else None,
294 'height': height,
295 }, res))
296
297 self._sort_formats(formats, field_preference=('height', 'width', 'tbr', 'format_id'))
298
299 return {
300 'id': video_id,
301 'title': title,
302 'description': description,
303 'thumbnail': thumbnail,
304 'duration': duration,
305 'formats': formats
306 }
307
308
309 class UdemyCourseIE(UdemyIE):
310 IE_NAME = 'udemy:course'
311 _VALID_URL = r'https?://(?:www\.)?udemy\.com/(?P<id>[^/?#&]+)'
312 _TESTS = []
313
314 @classmethod
315 def suitable(cls, url):
316 return False if UdemyIE.suitable(url) else super(UdemyCourseIE, cls).suitable(url)
317
318 def _real_extract(self, url):
319 course_path = self._match_id(url)
320
321 webpage = self._download_webpage(url, course_path)
322
323 course_id, title = self._extract_course_info(webpage, course_path)
324
325 self._enroll_course(url, webpage, course_id)
326
327 response = self._download_json(
328 'https://www.udemy.com/api-2.0/courses/%s/cached-subscriber-curriculum-items' % course_id,
329 course_id, 'Downloading course curriculum', query={
330 'fields[chapter]': 'title,object_index',
331 'fields[lecture]': 'title,asset',
332 'page_size': '1000',
333 })
334
335 entries = []
336 chapter, chapter_number = [None] * 2
337 for entry in response['results']:
338 clazz = entry.get('_class')
339 if clazz == 'lecture':
340 asset = entry.get('asset')
341 if isinstance(asset, dict):
342 asset_type = asset.get('asset_type') or asset.get('assetType')
343 if asset_type != 'Video':
344 continue
345 lecture_id = entry.get('id')
346 if lecture_id:
347 entry = {
348 '_type': 'url_transparent',
349 'url': 'https://www.udemy.com/%s/learn/v4/t/lecture/%s' % (course_path, entry['id']),
350 'title': entry.get('title'),
351 'ie_key': UdemyIE.ie_key(),
352 }
353 if chapter_number:
354 entry['chapter_number'] = chapter_number
355 if chapter:
356 entry['chapter'] = chapter
357 entries.append(entry)
358 elif clazz == 'chapter':
359 chapter_number = entry.get('object_index')
360 chapter = entry.get('title')
361
362 return self.playlist_result(entries, course_id, title)