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[youtube-dl] / 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_urllib_parse,
8     compat_urllib_request,
9 )
10 from ..utils import (
11     ExtractorError,
12 )
13
14
15 class UdemyIE(InfoExtractor):
16     IE_NAME = 'udemy'
17     _VALID_URL = r'https?://www\.udemy\.com/(?:[^#]+#/lecture/|lecture/view/?\?lectureId=)(?P<id>\d+)'
18     _LOGIN_URL = 'https://www.udemy.com/join/login-submit/'
19     _NETRC_MACHINE = 'udemy'
20
21     _TESTS = [{
22         'url': 'https://www.udemy.com/java-tutorial/#/lecture/172757',
23         'md5': '98eda5b657e752cf945d8445e261b5c5',
24         'info_dict': {
25             'id': '160614',
26             'ext': 'mp4',
27             'title': 'Introduction and Installation',
28             'description': 'md5:c0d51f6f21ef4ec65f091055a5eef876',
29             'duration': 579.29,
30         },
31         'skip': 'Requires udemy account credentials',
32     }]
33
34     def _handle_error(self, response):
35         if not isinstance(response, dict):
36             return
37         error = response.get('error')
38         if error:
39             error_str = 'Udemy returned error #%s: %s' % (error.get('code'), error.get('message'))
40             error_data = error.get('data')
41             if error_data:
42                 error_str += ' - %s' % error_data.get('formErrors')
43             raise ExtractorError(error_str, expected=True)
44
45     def _download_json(self, url_or_request, video_id, note='Downloading JSON metadata'):
46         headers = {
47             'X-Udemy-Snail-Case': 'true',
48             'X-Requested-With': 'XMLHttpRequest',
49         }
50         for cookie in self._downloader.cookiejar:
51             if cookie.name == 'client_id':
52                 headers['X-Udemy-Client-Id'] = cookie.value
53             elif cookie.name == 'access_token':
54                 headers['X-Udemy-Bearer-Token'] = cookie.value
55
56         if isinstance(url_or_request, compat_urllib_request.Request):
57             for header, value in headers.items():
58                 url_or_request.add_header(header, value)
59         else:
60             url_or_request = compat_urllib_request.Request(url_or_request, headers=headers)
61
62         response = super(UdemyIE, self)._download_json(url_or_request, video_id, note)
63         self._handle_error(response)
64         return response
65
66     def _real_initialize(self):
67         self._login()
68
69     def _login(self):
70         (username, password) = self._get_login_info()
71         if username is None:
72             raise ExtractorError(
73                 'Udemy account is required, use --username and --password options to provide account credentials.',
74                 expected=True)
75
76         login_popup = self._download_webpage(
77             'https://www.udemy.com/join/login-popup?displayType=ajax&showSkipButton=1', None,
78             'Downloading login popup')
79
80         if login_popup == '<div class="run-command close-popup redirect" data-url="https://www.udemy.com/"></div>':
81             return
82
83         csrf = self._html_search_regex(
84             r'<input type="hidden" name="csrf" value="(.+?)"',
85             login_popup, 'csrf token')
86
87         login_form = {
88             'email': username,
89             'password': password,
90             'csrf': csrf,
91             'displayType': 'json',
92             'isSubmitted': '1',
93         }
94         request = compat_urllib_request.Request(
95             self._LOGIN_URL, compat_urllib_parse.urlencode(login_form).encode('utf-8'))
96         response = self._download_json(
97             request, None, 'Logging in as %s' % username)
98
99         if 'returnUrl' not in response:
100             raise ExtractorError('Unable to log in')
101
102     def _real_extract(self, url):
103         lecture_id = self._match_id(url)
104
105         lecture = self._download_json(
106             'https://www.udemy.com/api-1.1/lectures/%s' % lecture_id,
107             lecture_id, 'Downloading lecture JSON')
108
109         asset_type = lecture.get('assetType') or lecture.get('asset_type')
110         if asset_type != 'Video':
111             raise ExtractorError(
112                 'Lecture %s is not a video' % lecture_id, expected=True)
113
114         asset = lecture['asset']
115
116         stream_url = asset.get('streamUrl') or asset.get('stream_url')
117         mobj = re.search(r'(https?://www\.youtube\.com/watch\?v=.*)', stream_url)
118         if mobj:
119             return self.url_result(mobj.group(1), 'Youtube')
120
121         video_id = asset['id']
122         thumbnail = asset.get('thumbnailUrl') or asset.get('thumbnail_url')
123         duration = asset['data']['duration']
124
125         download_url = asset.get('downloadUrl') or asset.get('download_url')
126
127         video = download_url.get('Video') or download_url.get('video')
128         video_480p = download_url.get('Video480p') or download_url.get('video_480p')
129
130         formats = [
131             {
132                 'url': video_480p[0],
133                 'format_id': '360p',
134             },
135             {
136                 'url': video[0],
137                 'format_id': '720p',
138             },
139         ]
140
141         title = lecture['title']
142         description = lecture['description']
143
144         return {
145             'id': video_id,
146             'title': title,
147             'description': description,
148             'thumbnail': thumbnail,
149             'duration': duration,
150             'formats': formats
151         }
152
153
154 class UdemyCourseIE(UdemyIE):
155     IE_NAME = 'udemy:course'
156     _VALID_URL = r'https?://www\.udemy\.com/(?P<coursepath>[\da-z-]+)'
157     _SUCCESSFULLY_ENROLLED = '>You have enrolled in this course!<'
158     _ALREADY_ENROLLED = '>You are already taking this course.<'
159     _TESTS = []
160
161     @classmethod
162     def suitable(cls, url):
163         return False if UdemyIE.suitable(url) else super(UdemyCourseIE, cls).suitable(url)
164
165     def _real_extract(self, url):
166         mobj = re.match(self._VALID_URL, url)
167         course_path = mobj.group('coursepath')
168
169         response = self._download_json(
170             'https://www.udemy.com/api-1.1/courses/%s' % course_path,
171             course_path, 'Downloading course JSON')
172
173         course_id = int(response['id'])
174         course_title = response['title']
175
176         webpage = self._download_webpage(
177             'https://www.udemy.com/course/subscribe/?courseId=%s' % course_id,
178             course_id, 'Enrolling in the course')
179
180         if self._SUCCESSFULLY_ENROLLED in webpage:
181             self.to_screen('%s: Successfully enrolled in' % course_id)
182         elif self._ALREADY_ENROLLED in webpage:
183             self.to_screen('%s: Already enrolled in' % course_id)
184
185         response = self._download_json(
186             'https://www.udemy.com/api-1.1/courses/%s/curriculum' % course_id,
187             course_id, 'Downloading course curriculum')
188
189         entries = [
190             self.url_result(
191                 'https://www.udemy.com/%s/#/lecture/%s' % (course_path, asset['id']), 'Udemy')
192             for asset in response if asset.get('assetType') or asset.get('asset_type') == 'Video'
193         ]
194
195         return self.playlist_result(entries, course_id, course_title)